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单词 bridge
释义

bridge


bridge 1

B0479300 (brĭj)n.1. A structure spanning and providing passage over a gap or barrier, such as a river or roadway.2. Something resembling or analogous to this structure in form or function: a land bridge between the continents; a bridge of understanding between two countries.3. a. The upper bony ridge of the human nose.b. The part of a pair of eyeglasses that rests against this ridge.4. A fixed or removable replacement for one or several but not all of the natural teeth, usually anchored at each end to a natural tooth.5. Music a. A thin, upright piece of wood in some stringed instruments that supports the strings above the soundboard.b. A transitional passage connecting two subjects or movements.6. Nautical A crosswise platform or enclosed area above the main deck of a ship from which the ship is controlled.7. Games a. A long stick with a notched plate at one end, used to steady the cue in billiards. Also called rest1.b. The hand used as a support to steady the cue.8. Electricity a. Any of various instruments for measuring or comparing the characteristics, such as impedance or inductance, of a conductor.b. An electrical shunt.9. Chemistry An intramolecular connection that spans atoms or groups of atoms.tr.v. bridged, bridg·ing, bridg·es 1. To build a bridge over.2. To cross by or as if by a bridge.
[Middle English brigge, from Old English brycg; see bhrū- in Indo-European roots.]
bridge′a·ble adj.

bridge 2

B0479300 (brĭj)n. Any of several card games derived from whist, usually played by four people in two partnerships, in which trump is determined by bidding and the hand opposite the declarer is played as a dummy.
[From earlier biritch (influenced by bridge), from Russian birich, a call, from Old Russian birichĭ.]

bridge

(brɪdʒ) n1. (Civil Engineering) a structure that spans and provides a passage over a road, railway, river, or some other obstacle2. something that resembles this in shape or function: his letters provided a bridge across the centuries. 3. (Anatomy) a. the hard ridge at the upper part of the nose, formed by the underlying nasal bonesb. any anatomical ridge or connecting structure. Compare pons4. the part of a pair of glasses that rests on the nose5. (Dentistry) Also called: bridgework a dental plate containing one or more artificial teeth that is secured to the surrounding natural teeth6. (Nautical Terms) a platform athwartships and above the rail, from which a ship is piloted and navigated7. (Instruments) a piece of wood, usually fixed, supporting the strings of a violin, guitar, etc, and transmitting their vibrations to the sounding board8. (Literary & Literary Critical Terms) Also called: bridge passage a passage in a musical, literary, or dramatic work linking two or more important sections9. (Electronics) electronics Also called: bridge circuit any of several networks, such as a Wheatstone bridge, consisting of two branches across which a measuring device is connected. The resistance, capacitance, etc, of one component can be determined from the known values of the others when the voltage in each branch is balanced10. (Computer Science) computing a device that connects networks and sends packets between them11. (Billiards & Snooker) billiards snooker a. a support for a cue made by placing the fingers on the table and raising the thumbb. a cue rest with a notched end for shots beyond normal reach12. (Theatre) theatre a. a platform of adjustable height above or beside the stage for the use of stagehands, light operators, etcb. chiefly Brit a part of the stage floor that can be raised or lowered13. (Mechanical Engineering) a partition in a furnace or boiler to keep the fuel in place14. build bridges to promote reconciliation or cooperation between hostile groups or people15. burn one's bridges See burn11916. cross a bridge when one comes to it to deal with a problem only when it arises; not to anticipate difficultiesvb (tr) 17. to build or provide a bridge over something; span: to bridge a river. 18. to connect or reduce the distance between: let us bridge our differences. [Old English brycg; related to Old Norse bryggja gangway, Old Frisian bregge, Old High German brucka, Danish, Swedish bro] ˈbridgeable, ˈbridgable adj ˈbridgeless adj

bridge

(brɪdʒ) n (Bridge) a card game for four players, based on whist, in which one hand (the dummy) is exposed and the trump suit decided by bidding between the players. See also contract bridge, duplicate bridge, rubber bridge, auction bridge[C19: of uncertain origin, but compare Turkish bir-üç (unattested phrase) one-three (said perhaps to refer to the one exposed hand and the three players' hands)]

Bridge

(brɪdʒ) n (Biography) Frank. 1879–1941, English composer, esp of chamber music. He taught Benjamin Britten

bridge1

(brɪdʒ)

n., v. bridged, bridg•ing,
adj. n. 1. a structure spanning and providing passage over a river, chasm, road, or the like. 2. a connecting, transitional, or intermediate route, phase, etc. 3. a raised transverse platform from which a power vessel is navigated and that often includes a pilot house. 4. the ridge or upper line of the nose. 5. the part of a pair of eyeglasses that joins the two lenses and spans the nose. 6. an artificial replacement, fixed or removable, of a missing tooth or teeth, supported by adjacent natural teeth or roots. 7. a thin fixed wedge or support raising the strings of a musical instrument above the sounding board. 8. a transitional modulatory passage connecting sections of a musical composition. 9. a transitional passage as in a literary work. 10. an electrical circuit or device for measuring resistance, capacitance, inductance, or impedance. Compare Wheatstone bridge. 11. a gantry over a railroad track for supporting waterspouts, signals, etc. 12. a. the arch formed by the hand and fingers to support the striking end of a billiards or pool cue. b. a notched piece of wood with a long handle used to support the striking end of a cue. 13. a gallery or platform that can be raised or lowered over a stage for use by technical crew members. 14. a valence bond connecting two parts of a molecule. v.t. 15. to make a bridge or passage over; span. 16. to join by or as if by a bridge. 17. to make (a way) by a bridge. adj. 18. (esp. of clothing) less expensive than a manufacturer's most expensive products. [before 1000; Middle English brigge, Old English brycg, c. Old Saxon bruggia, Old High German brucca, Old Norse bryggja] bridge′a•ble, adj.

bridge2

(brɪdʒ)

n. a card game derived from whist in which one partnership plays to fulfill a certain declaration against an opposing partnership. [1885–90; earlier also sp. britch, biritch; of obscure orig.]

bridge


Past participle: bridged
Gerund: bridging
Imperative
bridge
bridge
Present
I bridge
you bridge
he/she/it bridges
we bridge
you bridge
they bridge
Preterite
I bridged
you bridged
he/she/it bridged
we bridged
you bridged
they bridged
Present Continuous
I am bridging
you are bridging
he/she/it is bridging
we are bridging
you are bridging
they are bridging
Present Perfect
I have bridged
you have bridged
he/she/it has bridged
we have bridged
you have bridged
they have bridged
Past Continuous
I was bridging
you were bridging
he/she/it was bridging
we were bridging
you were bridging
they were bridging
Past Perfect
I had bridged
you had bridged
he/she/it had bridged
we had bridged
you had bridged
they had bridged
Future
I will bridge
you will bridge
he/she/it will bridge
we will bridge
you will bridge
they will bridge
Future Perfect
I will have bridged
you will have bridged
he/she/it will have bridged
we will have bridged
you will have bridged
they will have bridged
Future Continuous
I will be bridging
you will be bridging
he/she/it will be bridging
we will be bridging
you will be bridging
they will be bridging
Present Perfect Continuous
I have been bridging
you have been bridging
he/she/it has been bridging
we have been bridging
you have been bridging
they have been bridging
Future Perfect Continuous
I will have been bridging
you will have been bridging
he/she/it will have been bridging
we will have been bridging
you will have been bridging
they will have been bridging
Past Perfect Continuous
I had been bridging
you had been bridging
he/she/it had been bridging
we had been bridging
you had been bridging
they had been bridging
Conditional
I would bridge
you would bridge
he/she/it would bridge
we would bridge
you would bridge
they would bridge
Past Conditional
I would have bridged
you would have bridged
he/she/it would have bridged
we would have bridged
you would have bridged
they would have bridged

bridge

1. Position of the hand on which the cue rests.2. Position of the hand on which the cue rests.3. Position of the hand on which the cue rests.
Thesaurus
Noun1.bridge - a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.bridge - a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.spanarch - (architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above itBailey bridge - a temporary bridge designed for rapid constructioncantilever bridge - bridge constructed of two cantilevers that meet in the middlecattle grid, cattle guard - a bridge over a ditch consisting of parallel metal bars that allow pedestrians and vehicles to pass, but not cattlecovered bridge - a bridge whose passageway is protected by a roof and enclosing sidesdrawbridge, lift bridge - a bridge that can be raised to block passage or to allow boats or ships to pass beneath itfootbridge, overcrossing, pedestrian bridge - a bridge designed for pedestriansflyover, overpass - bridge formed by the upper level of a crossing of two highways at different levelspier - a support for two adjacent bridge spansbateau bridge, floating bridge, pontoon bridge - a temporary bridge built over a series of pontoonsrope bridge - a bridge consisting of ropessteel arch bridge - a steel bridge constructed in the form of an archstructure, construction - a thing constructed; a complex entity constructed of many parts; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"suspension bridge - a bridge that has a roadway supported by cables that are anchored at both endstoll bridge - a bridge where toll is charged for crossingtransportation, transportation system, transit - a facility consisting of the means and equipment necessary for the movement of passengers or goodstrestle - a supporting tower used to support a bridgetrestle bridge - a bridge supported by trestleworktruss bridge - a bridge supported by trussesviaduct - bridge consisting of a series of arches supported by piers used to carry a road (or railroad) over a valley
2.bridge - a circuit consisting of two branches (4 arms arranged in a diamond configuration) across which a meter is connectedbridge circuitcircuit, electric circuit, electrical circuit - an electrical device that provides a path for electrical current to flowWheatstone bridge - a bridge used to measure resistances
3.bridge - something resembling a bridge in form or function; "his letters provided a bridge across the centuries"connection, connexion, connectedness - a relation between things or events (as in the case of one causing the other or sharing features with it); "there was a connection between eating that pickle and having that nightmare"
4.bridge - the hard ridge that forms the upper part of the nose; "her glasses left marks on the bridge of her nose"anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure"nasal bone, os nasale, nasal - an elongated rectangular bone that forms the bridge of the nosenose, olfactory organ - the organ of smell and entrance to the respiratory tract; the prominent part of the face of man or other mammals; "he has a cold in the nose"
5.bridge - any of various card games based on whist for four playerscard game, cards - a game played with playing cardsbridge whist - the earliest form of bridge; the dealer could name the trump suitauction, auction bridge - a variety of bridge in which tricks made in excess of the contract are scored toward game; now generally superseded by contract bridgecontract bridge, contract - a variety of bridge in which the bidder receives points toward game only for the number of tricks he bidtrumping, ruff - (card games) the act of taking a trick with a trump when unable to follow suitmajor suit - (bridge) a suit of superior scoring value, either spades or heartsminor suit - ( bridge) a suit of inferior scoring value, either diamonds or clubsstopper - (bridge) a playing card with a value sufficiently high to insure taking a trick in a particular suit; "if my partner has a spade stopper I can bid no trump"bidding, bid - (bridge) the number of tricks a bridge player is willing to contract to makecontract, declaration - (contract bridge) the highest bid becomes the contract setting the number of tricks that the bidder must maketakeout - (bridge) a bid that asks your partner to bid another suitovercall, overbid - (bridge) a bid that is higher than your opponent's bid (especially when your partner has not bid at all and your bid exceeds the value of your hand)slam, sweep - winning all or all but one of the tricks in bridgedoubleton - (bridge) a pair of playing cards that are the only cards in their suit in the hand dealt to a playerraise - bid (one's partner's suit) at a higher leveldeclare - designate (a trump suit or no-trump) with the final bid of a handoutbid - bid over an opponent's bid when one's partner has not bid or doubledoverbid - to bid for more tricks than one can expect to win,preempt - make a preemptive bid in the game of bridge
6.bridge - a wooden support that holds the strings upstringed instrument - a musical instrument in which taut strings provide the source of soundsupport - any device that bears the weight of another thing; "there was no place to attach supports for a shelf"
7.bridge - a denture anchored to teeth on either side of missing teethbridgeworkdental plate, denture, plate - a dental appliance that artificially replaces missing teeth
8.bridge - the link between two lenses; rests on the nosenosepiecelinkup, tie-in, link, tie - a fastener that serves to join or connect; "the walls are held together with metal links placed in the wet mortar during construction"eyeglasses, glasses, specs, spectacles - optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision
9.bridge - an upper deck where a ship is steered and the captain standsbridge - an upper deck where a ship is steered and the captain standsbridge deckconning tower - a raised bridge on a submarine; often used for entering and exitingfly bridge, flybridge, flying bridge, monkey bridge - the highest navigational bridge on a ship; a small (often open) deck above the pilot housepilothouse, wheelhouse - an enclosed compartment from which a vessel can be navigatedupper deck - a higher deck
Verb1.bridge - connect or reduce the distance betweenbridge overconnect, link, link up, tie - connect, fasten, or put together two or more pieces; "Can you connect the two loudspeakers?"; "Tie the ropes together"; "Link arms"bridge over, tide over, keep going - suffice for a period between two points; "This money will keep us going for another year"
2.bridge - make a bridge across; "bridge a river"bring together, join - cause to become joined or linked; "join these two parts so that they fit together"
3.bridge - cross over on a bridgecross, cut across, cut through, get over, traverse, pass over, get across, track, cover - travel across or pass over; "The caravan covered almost 100 miles each day"

bridge

noun1. arch, span, viaduct, aqueduct, flyover, overpass He walked over the railway bridge.2. link, tie, bond, connection They saw themselves as a bridge to peace.verb1. span, cross, go over, cross over, traverse, reach across, extend across, arch over a tree used to bridge the river2. reconcile, unite, resolve, overcome She bridged the gap between pop music and opera.
reconcile separate, split, divide, widen, sever, keep apart, sunder
Related words
adjective pontine

Bridges

Bridges Brooklyn Bridge, Clifton Suspension Bridge, Forth Railway Bridge, Forth Road Bridge, Gateshead Millennium Bridge, Golden Gate Bridge, Halfpenny Bridge, Humber Bridge, London Bridge, Millennium Bridge, Oakland Bay Bridge, Rainbow Bridge, Rialto Bridge, Severn Bridge, Bridge of Sighs, Skye Bridge, Sydney Harbour Bridge, Tower Bridge, Tyne Bridge, Waterloo Bridge, Westminster BridgeTypes of bridge aqueduct, Bailey bridge, balance, bascule, or counterpoise bridge, box-girder bridge, cable-stayed bridge, cantilever bridge, clapper bridge, deck bridge, drawbridge, flyover, footbridge, pivot, swing, or turn bridge, pontoon bridge, snow bridge, suspension bridge, truss bridge, turn bridge, viaduct
Translations
桥琴马船桥鼻梁弥合

bridge

(bridʒ) noun1. a structure carrying a road or railway over a river etc. 2. the narrow raised platform for the captain of a ship. 船橋 船桥3. the bony part (of the nose). 鼻樑 鼻梁4. the support of the strings of a violin etc. 琴馬,弦柱 琴马 verb1. to build a bridge over. They bridged the stream. 架橋 架桥2. to close a gap, pause etc. He bridged the awkward silence with a funny remark. 彌合 弥合

bridge

桥zhCN

bridge


See:
  • a bridge too far
  • be like painting the Forth Bridge
  • be water under the bridge
  • bridge over
  • bridge over (something)
  • bridge the gap
  • build bridges
  • burn (one's) bridges
  • burn (one's) bridges in front of (one)
  • burn bridges
  • burn bridges in front of
  • burn one's bridges
  • burn one's bridges/boats, to
  • burn your bridges
  • cross a bridge before one comes to it
  • cross a bridge when one comes to it
  • cross a bridge when you come to it
  • cross a/that bridge before (one) comes to it
  • cross that bridge later
  • cross that bridge when (one) comes to it
  • cross that bridge when one comes to it
  • cross that bridge when you come to it
  • Don't cross that bridge till you come to it.
  • paint the Forth Bridge
  • water over the dam
  • water under the bridge

bridge


bridge,

structure built over water or any obstacle or depression to allow the passage of pedestrians or vehicles. See also viaductviaduct
[Lat.,=road conveyor], type of bridge for carrying a highway or railroad over a valley, over low ground, or over a road. It is commonly constructed in the form of several towers or piers that support arches on which the roadway rests.
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.

Early Bridges

In ancient times and among primitive peoples a log was thrown across a stream, or two vines or woven fibrous ropes (the upper for a handhold and the lower for a footwalk) were thrown across, to serve as a bridge. Later, arched structures of stone or brick were used; traces of these, built from 4000 to 2000 B.C., have been found in the E Mediterranean region. The Romans built long, arched spans, many of which are still standing. Bridges built during the Middle Ages usually rested on crude stone arches with heavy pierspier,
in engineering, term applied to a mass of reinforced concrete or masonry supporting a large structure, such as a bridge. When piers are built on ground of poor bearing value, it is often necessary to drive piles to obtain a firm base.
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 (intermediate supports) that were a great obstruction to river traffic, and their roadways were often lined with small shops.

The best known early American design is the New England covered bridge, since wood was abundant and cheap, and did not demand trained masons. Colonial American bridge builders were willing to run the risk of rot or fire in exchange for such savings in time and manpower. Beginning with Abraham Darby's bridge at Coalbrookdale in 1779, most bridges began to be built of cast and wrought iron. Robert Stephenson, an English engineer, designed and built a bridge of this type across Menai Strait in North Wales (1850). Another is Victoria Bridge across the St. Lawrence at Montreal. The disadvantage of cast iron for bridges is its low tensile strength.

Modern Bridge Designs

There are six basic modern bridge forms: the beam, the truss, the arch, the cantilever, the cable-stayed, and the suspension. A beam bridge is made of long timber, metal, or concrete beams anchored at each end. If the beams are arranged in a lattice, such as a triangle, so that each shares only a portion of the weight on any part of the structure, the result is a truss bridge. An arch bridge has a bowed shape causing the vertical force of the weight it carries to produce a horizontal outward force at its ends. It may be constructed of steel, concrete, or masonry. A cantilevercantilever
, beam supported rigidly at one end to carry a load along the free arm or at the free end. A slanting beam fixed at the base is often used to support the free end, as in a common bracket.
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 bridge is formed by self-supporting arms anchored at and projecting toward one another from the ends; they meet in the middle of the span where they are connected together or support a third member. In a cable-stayed bridge, the roadway is supported by cables attached directly to the supporting tower or towers. This differs from a suspension bridge, where the roadway is suspended from vertical cables that are in turn attached to two or more main cables. These main cables hang from two towers and have their ends anchored in bedrock or concrete.

The modern era of bridge building began with the development of the Bessemer processBessemer process
[for Sir Henry Bessemer], industrial process for the manufacture of steel from molten pig iron. The principle involved is that of oxidation of the impurities in the iron by the oxygen of air that is blown through the molten iron; the heat of oxidation raises the
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 for converting cast iron into steel. It became possible to design framed structures with greater ease and flexibility. Single-piece, rolled steel beams can support spans of 50 to 100 ft (15–30 m), depending on the load. Larger, built-up beams are made for longer spans; a steel box-beam bridge with an 850-ft (260-m) span crosses the Rhine at Cologne.

Truss, Arch, and Cantilever Bridges

The truss can span even greater distances and carry heavy loads; it is therefore commonly used for railroad bridges. A large truss span like that over the Columbia River at Astoria, Oreg., can extend to 1,232 ft (376 m); the Ikitsuki Bridge, connecting Ikitsuki and Hirado islands in SW Japan, has a continuous-truss span of 1,312 ft (400 m), the longest in the world. If the truss is shaped into an arch, even longer bridges are possible; the Chaotianmen Bridge in Chongqing, China, the Lupu Bridge, Shanghai, China, the New River Bridge in West Virginia, the Bayonne Bridge between New York and New Jersey, and the Sydney Harbor Bridge in Australia have the longest steel arch spans, at 1,811 ft (552 m), 1,804 ft (550 m), 1,700 ft (518 m), 1,675 ft (510 m), and 1,670 ft (509 m), respectively. Concrete arch bridges tend to be somewhat smaller, the largest being the Wanxian Bridge in China and the Krk Bridge in Croatia at 1,378 ft (420 m) and 1,280 ft (390 m), respectively. The longest concrete arch bridge in the United States is the Natchez Trace Parkway Bridge in Franklin, Tenn., at 582 ft (177 m), although the concrete and steel O'Callaghan-Tillman Memorial Bridge, Nev.-Ariz., near Hoover Dam, has the largest concrete arch, at 1,079 ft (329 m). The cantilever, however, is more common for spans of such lengths. The cantilevered Forth Bridge (1890) in Scotland was the first major structure built entirely of steel, the material that made possible its two record-setting spans of 1,710 ft (521 m) each. They remained the longest in existence until 1917, when the St. Lawrence River at Quebec Bridge was built; it has an 1,800-ft (549-m) span. The longest cantilever bridge in the United States is the Commodore John Barry Bridge in Chester, Penn., which has an 1,644 ft (501 m) span.

Cable-Stayed, Suspension, and Combination Bridges

The cable-stayed bridge is the most modern type, coming into prominence during the 1950s. The longest is the Russky Bridge, Vladivostok, Russia, which has a main span of 3,622 ft (1,104 m); the Sutong Bridge, Suzhou–Nantong, Jiangsu, China, with a main span of 3,570 ft (1,088 m), and the Stonecutters Bridge, Hong Kong, with a main span of 3,340 ft (1,018 m) are other long cable-stayed bridges. The longest cable-stayed bridge in the United States is the Arthur Ravenel, Jr., Bridge in Charleston, S.C., which has a span of 1,546 ft (471 m).

The suspension bridge is used for the longest spans. The earliest suspension bridges built in America were those constructed by the American builder James Finley. The design of suspension bridges advanced when J. A. RoeblingRoebling, John Augustus
, 1806–69, German-American engineer, b. Mulhouse. He studied engineering in Berlin and in 1831 came to the United States. He demonstrated the practicability of steel cable and established a plant for manufacturing it at Trenton, N.J.
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, a German-born engineer who emigrated to the United States, developed the use of wire cables and stiffening trusses. His first completed suspension bridge spanned the Niagara River in 1854. He also designed the Brooklyn BridgeBrooklyn Bridge,
vehicular suspension bridge, New York City, southernmost of the bridges across the East River, between lower Manhattan and Brooklyn; built 1869–83. The achievement of J. A. Roebling and his son W. A. Roebling, it has a span of 1,595.5 ft (487 m).
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 across the East River (completed 1883), which was the world's longest suspension bridge at the time of its construction, having a main span of 1,595.5 ft (487 m).

Today the longest spans in the world are suspended. The longest main spans are the Akashi Kaikyo Bridge, Hyogo, Japan, 6,529 ft (1,990 m); the Xihoumen Bridge, Zhoushan Archipelago, China, 5,414 ft (1,650 m); the Store Bælt Bridge, Denmark, 5,328 ft (1,624 m); the south span of the Runyang Bridge, Jiangsu, China, 4,888 ft (1,490 m); and the Humber River Bridge, Hull, England, 4,626 ft (1410 m). The longest suspension bridges in the United States are the Verrazzano-Narrows BridgeVerrazzano-Narrows Bridge,
vehicular suspension bridge, New York City, across the Narrows at the entrance to New York harbor, linking the boroughs of Brooklyn and Staten Island. Designed by O. H. Ammann, the bridge was completed in 1964.
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, New York City, 4,260 ft (1,298 m); the Golden Gate BridgeGolden Gate Bridge,
across the Golden Gate from San Francisco to Marin Co., W Calif.; built 1933–37. Its overall length is 9,266 ft (2,824 m); its main span across the strait, 4,200 ft (1,280 m), is one of the longest suspension bridges in the world. Joseph B.
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, San Francisco, 4,200 ft (1,280 m); the Mackinac Straits Bridge, Mich., 3,800 ft (1,158 m); George Washington BridgeGeorge Washington Bridge,
vehicular suspension bridge across the Hudson River, between Manhattan borough of New York City and Fort Lee, N.J.; constructed 1927–31. It is one of the longest suspension bridges in the world.
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, New York City, 3,500 ft (1,067 m); and the two Tacoma Narrows Bridges, Tacoma, Wash., 2,800 ft (853 m) each.

Combination spans are often used to bridge even longer stretches of water. The San Francisco–Oakland Bay BridgeSan Francisco–Oakland Bay Bridge,
double-decked structure, W Calif.; built 1933–36 and (eastern section replacement) 2002–13. It has a total length of 8.25 mi (13.2 km).
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, noted for its three long spans, of which two are traditional suspension spans and the third a self-anchored single-tower suspension, has a total length of 8.25 mi (13.2 km). The Hong Kong–Zhuhai–Macau Bridge's main section, which links Hong Kong with Macau and Zhuhai, China, across the Pearl River estuary, consists of a 14.2 mi (22.9 km) bridge and 4.2 mi (6.7 km) tunnel; the Chesapeake Bay Bridge-TunnelChesapeake Bay Bridge-Tunnel,
officially the Lucius J. Kellam, Jr. Bridge-Tunnel,
17.6 mi (28.2 km) long, across the mouth of Chesapeake Bay, E Va., connecting Cape Charles with Norfolk, Va.
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 has two 1-mi (1.6-km) tunnels along its 17.6-mi (28.2-km) length; and the 8-mi (12.9-km) Confederation BridgeConfederation Bridge,
Fr. Pont de la Confédération, bridge that joins Borden-Carleton in Prince Edward Island with Cape Jourimain in New Brunswick, Canada. Spanning the Northumberland Strait at its narrowest point, the bridge measures 8 mi (12.
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, linking Prince Edward Island to the Canadian mainland, consists of three bridges. The longest cross-sea bridges are the Hangzhou Bay Bridge, 22.4 mi (36 km) long, which crosses the bay between Zhapu and Cixi, Zhejiang prov., China; the Donghai Bridge, 20.2 mi (32.5 km), which connects Shanghai, China, with the deepwater port on Yangshan Island in Hangzhou Bay; and the Jiaozhou Bay Bridge, 16.6 mi (26.7 km) long, which connects Qingdao with Huangdao, Shangdong prov., China; these bridges combine causeway with cable-stayed spans. The longest combination spans in the United States are the twin Lake Ponchartrain Causeways near New Orleans, Louisiana, whose parallel roadways stretch nearly 24 mi (38 km). Some viaducts carrying high-speed rail lines over land are even longer; the longest is the Danyang-Kunshan Grand Bridge, a 102.4-mi (164.8-km) viaduct in Jiangsu prov., China.

Movable Bridges

Movable bridges are generally constructed over waterways where it is impossible or prohibitive to build a fixed bridge high enough for water traffic to pass under it. The most common types of movable bridge are the lifting, bascule, and swing bridges. The lifting bridge, or lift bridge, consists of a rigid frame carrying the road and resting abutments, over each of which rises a steel-frame tower. The center span, which in existing bridges is as long as 585 ft (178 m), is hoisted vertically. The bascule bridge follows the principle of the ancient drawbridge. It may be in one span or in two halves meeting at the center. It consists of a rigid structure mounted at the abutment on a horizontal shaft, about which it swings in a vertical arc. The lower center span of the famous Tower Bridge in London is of the double-leaf bascule type. Because of the need for large counterweights and the stress on hoisting machinery, bascule bridge spans are limited to about 250 ft (75 m). The swing bridge is usually mounted on a pier in midstream and swung parallel to the stream to allow water passage.

Military Bridges

In wartime, where the means of crossing a stream or river is lacking or a bridge has been destroyed by the enemy, the military bridge plays a vital role. Standard types of military bridges include the trestle, built on the spot by the engineering corps from any available material, and the floating bridge made with portable pontoonspontoon,
one of a number of floats used chiefly to support a bridge, to raise a sunken ship, or to float a hydroplane or a floating dock. Pontoons have been built of wood, of hides stretched over wicker frames, of copper or tin sheet metal sheathed over wooden frames, of
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.

Bibliography

See D. Plowden, The Spans of North America (1984); H. Petroski, Engineers of Dreams: Great Bridge Builders and the Spanning of America (1995); J. Dupré and F. O. Geary, Bridges: A History of the World's Most Famous and Important Spans (1996); S. A. Ostrow, Bridges (1997); F. Gottemoeller, Bridgescape: The Art of Designing Bridges (1998); K. Willard, Bridges: Designing the Future (1999). See also bibliographies for articles on individual bridges.


bridge,

card game derived from whistwhist,
card game for four players, those on opposite sides of the table being partners. The full pack of 52 cards is dealt. The dealer's last card is turned up to indicate trump, and after he draws this card in hand, the player on the left of the dealer leads.
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, played with 52 cards by four players in two partnerships.

Basic Rules

The cards in contract bridge rank from ace down to two; in bidding, suits rank spades, hearts, diamonds, and clubs. After all cards are dealt, so that each player holds 13 cards, the dealer begins the auction, which proceeds in rotation to the left. Each player must bid, pass, double (increase the value of the previously stated contract), or redouble (only after a double, further increasing the point value of the contract). A bid is an offer to win a stated number (over six) of tricks with a named suit as trump or with no trump. The lowest bid is one, the highest seven. Each bid, i.e., "one diamond," "one no-trump," "four hearts," must be higher than the preceding bid, with no-trump ranking above spades. Artificial bids are those that convey certain information to a partner and are not meant to be taken literally. The highest bid of the auction becomes the contract after three consecutive passes end the bidding. The player who first named the suit (or no-trump) specified in the winning bid becomes the declarer. The player to the left of the declarer leads any card face up, and the next hand, that of the declarer's partner, is placed face up on the table, grouped in suits. This is known as the dummy, and the declarer selects the cards to be played from this hand. The object of the game for both partnerships is to win as many tricks as possible, a trick being the three cards played in rotation after the lead. Suits must be followed, but a player who has no cards in the suit led may play any card. Highest trump or, if no trump card is played, highest card of the suit led wins. Points are awarded for the number of tricks won. Numerous conventions—generally accepted forms of bidding—are used in bridge, but the four standard ones are Blackwood, Gerber, Stayman, and grand-slam force.

Competitive Bridge

Duplicate bridge, in which the same prearranged hands are played by individuals, pairs, or teams of four, is the main form of competitive bridge. The laws of contract bridge are promulgated in the Western Hemisphere by the American Contract Bridge League, which holds various bridge tournaments. In international contract bridge matches the Bermuda bowl, the trophy for victory, is the emblem of the world championship. In Olympic years an olympiad championship is held by the World Bridge Federation and replaces the team tournament for the Bermuda bowl.

History

Bridge probably originated in the Middle East in the 19th cent. Auction bridge, one form of the game, was developed by the British in India and later was popular in England and the United States. It is still played but has largely been supplanted by contract bridge, which achieved popularity after important innovations were made in 1925 by Harold S. Vanderbilt. Its phenomenal popularity owed much to the activities of Ely CulbertsonCulbertson, Ely
, 1891–1955, American authority on contract bridge, b. Romania. His father was an American engineer then living in Romania, and his mother was of Russian parentage.
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. The craze subsided but was later revived; books, tournaments, and newspaper columns on bridge abound. Culbertson devised the honor count system to evaluate a hand for bidding. The point count (or standard American) system introduced by Charles H. Goren in the 1940s has generally replaced honor count.

Bibliography

See C. H. Goren, Bridge Complete (rev. ed. 1971); T. Reese and A. Dormer, The Complete Book of Bridge (1974).

bridge

See radio-source structure.

Bridge

A structure that spans a depression or provides a passage between two points at a height above the ground: affording passage for pedestrians and vehicles.

bascule bridge

A drawbridge with one or two balanced leaves that pivot vertically on a trunion located at one end of the span.

drawbridge

At the entrance to fortifications, a bridge over the moat or ditch, hinged and provided with a raising and lowering mechanism so as to hinder or permit passage.

footbridge

A narrow bridge structure that is designed to carry pedestrians only.

sidewalk bridge

A lightweight structural covering over a sidewalk to protect pedestrians from construction or cleaning of the structures overhead.

skywalk

A walkway that is located over the ground level and the street; and often connects buildings across a street.

suspension bridge

A bridge hung from cables that are strung between two towers or a tower and abutment.

swing bridge

A bridge that opens by turning horizontally on a turntable supported on a pier.

Bridge

 

a structure that provides a path over an obstacle. Bridges are classified according to the type of obstacle—bridges across rivers and other watercourses (bridges proper), across roads (overpasses), and across gullies and ravines (viaducts and trestles); according to the function of the path—railroad bridges, highway bridges, municipal bridges, footbridges, and bridges for integrated traffic, for the passage of water-ways (canal bridges), for water supply (aqueducts), and for gas and petroleum pipes; and according to the material of the main components—wooden, masonry, reinforced-concrete, and steel bridges.

The cost of erecting bridges accounts for up to 15 percent of the total construction cost of a road; on modern high-speed highways it is even higher. There are special requirements for the strength, safety, and durability of bridges. In addition, the design of a bridge should meet the requirements of industrial fabrication and mechanized erection, thus assuring rapid construction and high-quality workmanship.

Bridges usually consist of spans and piers. A vehicle roadway, as well as footways and pipelines, is laid on the bridge span. A distinction is made between river spans (over the navigable part of a river) and shore spans (over the remaining part). The roadway of a span may be below or above the supporting structure, as well as in the middle. The intermediate supports for a bridge are called piers, and the end supports are called abutments. The latter join the bridge to the embankments of the approaches. The loads on the span are transmitted to the piers through bearing parts. Other bridge systems are known, such as the frame type, in which the span and pier are a single unit (in such cases no bearing parts are installed).

The principal dimensions of a bridge (see Figure 1) are the total length L; the effective spans l1, l2, and l3 of the span structures, as measured between the centers of the support points; the internal widths l01, l02, and l03 of the piers; and the width of the roadway and sidewalks. The position of the structures with respect to height is described by marks (heights above an arbitrary horizon) for the roadway level R, the low-water level LW, the high-water level HW, and the base of the pier foundations F. The length of a bridge across a watercourse depends on its aperture, which is the sum of the internal widths between the piers minus the embankment cones. The aperture is found from hydraulic computations.

The height of a bridge (mark R) and the internal widths for the principal spans across navigable rivers are usually dictated by the conditions for the passage of ships. For overpasses the internal widths and the level of the roadway are dictated by the dimensions of the road beneath. In other cases, the level of the roadway is usually determined by the layout of the road passing across the bridge; the number and length of the spans are chosen on the basis of the lowest cost by comparing several versions. The width of the roadway and catwalks (overall bridge dimension), as well as the width and height of the free space under the bridge (navigation clearance), must provide for the passage of land and water transportation of the expected density. In the USSR the width of the roadbed on a bridge for a single-track railroad is 4.9

Figure 1. Diagram of a bridge: (1) river span, (2) shore spans, (3) roadway, (4) piers, (5) abutments, (6) bearing parts

m (including the catwalks). On a highway bridge the width of the roadway is set according to the number of traffic lanes (the width of a lane is 3.5–3.75 m).

A distinction is made among girder, arch, frame, suspension, guy, and combination bridges, depending on the basic design. A special group is formed by floating bridges, drawbridges, and prefabricated bridges.

Girder bridges have spans with a supporting structure in the form of continuous beams (girders) or through trusses, which may be simple (continuous; Figure 2, a) or cantilevered, with ends (cantilevers) that extend to adjacent spans by and are connected by hinges to simple beams suspended from the spans (Figure 2,b). Continuous (through) beams are more complicated in design than simple beams, but they are more economical and provide a smoother contour for the bridge roadway, which is especially important for high-speed traffic.

Arch bridges (Figure 2,c) require smaller consumption of materials for spans than do girder bridges. On the other hand, their piers must be designed to withstand horizontal forces, and therefore the cost of their construction is usually higher. If a tie beam is used (Figure 2,d), the piers are relieved of the thrust effect, but in this case the expenditures for the span structure are increased.

The piers of frame bridges (columns or pedestals) are rigidly connected to the spans by collar beams. A collar beam may be connected to several pedestals (Figure 2,e). Also widely used are bridges consisting of separate T-shaped frames, which are interconnected by hinges (cantilever-frame bridges) or beams

Figure 2. Bridge systems: (a) through-beam, (b) cantilever-beam, (c) arch, (d) combination (thrustless arch with tie beam), (e) frame, (f) frame-suspension, (g) suspension, (h) guy; (1) hinge, (2) arch, (3) structure above arch, (4) tie beam, (5) column, (6) collar beam, (7) cable, (8) tower, (9) hangers, (10) stiffening beam, (11) anchor abutment, (12) guys

mounted on the ends of the collar beams (suspension-frame bridges, Figure 2,f).

Suspension bridges (Figure 2,g) are similar in function to arch bridges, but the load-bearing elements are under tension and are convex downward, so that the thrust acts on the piers toward the center of the span. Guy bridges (Figure 2,h) closely resemble suspension bridges in design.

The load-bearing structures of combined systems blend elements of various types of bridges (for example, girder and arch bridges).

History. The construction of major bridges began in the era of the slaveholding society. Many stone and wooden bridges and aqueducts were constructed in ancient Rome, which had developed a network of roads totaling about 75, 000 km. The stone bridges that have been partially preserved have solid, largely semicircular, arches with small spans, and piers one-third to one-half of the span in width. Light wooden bridges on piles, as well as floating bridges, were also built; the latter were frequently used for military purposes.

During the Middle Ages the development of cities and the expansion of commerce necessitated the construction of many bridges; several unique masonry bridges of that period have substantial spans, smoother arches, and narrower supports (for example, the bridge across the Adda River in Trezzo, Italy, with a span of 72.25 m).

Bridges have been known in Russia since antiquity. The Tales of Bygone Years tells of bridge-building in the mid-tenth century. A floating bridge across the Dnieper at Kiev is mentioned in the chronicle (1115). Wooden girder bridges on piers consisting of log frameworks filled with stone (cribs) were also constructed. There was extensive bridge-building (mainly masonry) in Armenia and Georgia.

In the 16th and 17th centuries, both land and water communications developed. Bridges with large spans were required for the passage of ships. In the 18th century the span of wooden bridges on masonry piers reached 119 m (the bridge across the Limmat River in Germany). An outstanding achievement of the time was a wooden arch bridge across the Neva River, with a span of 298 m, designed by the talented self-educated Russian I. P. Kulibin.

Beginning in the late 18th century, metal was used in bridge construction. The first metal (cast iron) bridge was built in Great Britain across the Severn River in 1779. It had a span of about 30 m, which was covered by cast iron arches. Cast iron arch bridges became commonplace in other countries, including Russia. Such a bridge (now the Lieutenant Shmidt Bridge) was erected in St. Petersburg in 1850 by the Russian engineer S. V. Kerbedz; it had seven spans, 45–47 m each.

Several large suspension bridges (with iron chains), with spans of up to 265 m, were erected in the first half of the 19th century. However, owing to imperfect design and inadequate rigidity, many bridges collapsed because of the action of the wind or the increased vibration amplitudes during the passage of large numbers of people marching in step (the resonance phenomenon). In the mid-19th century the erection of steel girder bridges began. One of the first was the Britannia Railroad Bridge, constructed in Great Britain by the engineer R. Stephenson. Its spans were continuous tubular beams, 70 and 140 m long. The first attempts at analysis and testing of bridges with models during design and construction were made in this period. A theory of bridge design was developed. Of great importance was the research of the Russian engineer D. I. Zhuravskii, who developed methods of calculating girder frames and beams for transverse forces and who built several major bridges on the St. Petersburg-Moscow railroad.

The steel bridge with girder spans, frequently using through trusses for medium and large spans, became the principal type in the second half of the 19th century. The Russian school of bridge-building—and, in particular, professors N. A. Beleliub-skii and L. D. Proskuriakov—performed a great service in the development of new designs and forms of spans and in the improvement of their calculations. The bridge across the Volga at Syzran’, constructed between 1875 and 1881 according to a design by Beleliubskii, was 1, 443 m long (13 spans of 111 m each) and was the largest in Europe at that time.

In the 20th century the growth of industrial production and advances in construction work brought about the further development of bridge-building; the lengths covered by steel spans increased substantially. Among the large structures erected were a cantilever girder bridge across the St. Lawrence River in Quebec, Canada (1917), with a span of 549 m, and the arch bridge across the Kill van Kull in New York (1931), with a span of 503.8 m. In 1937 a suspension bridge with a main span of 1, 280 m was built across the Golden Gate in San Francisco.

Large metal bridges have been built in the USSR across the Volga at Gorky and Saratov (1935) and across the Dnieper at Zaporozh’e (according to the plans of N. S. Streletskii). Through the efforts of E. O. Paton, the use of automatic welding for the fabrication and erection of span structures is becoming increasingly widespread.

Reinforced-concrete bridges became very common in the early 20th century. Reinforced concrete was used mainly for girder spans of up to 50 m and for larger arch spans (more than 250 m). In the 1930’s a number of unique arch bridges were erected in the USSR using cast reinforced concrete (for example, the bridge across the Moskva River at Voskresensk, the Volodarskii Bridge across the Neva River in Leningrad, and the Moskvoretskii Bridge in Moscow). The use of prefabricated reinforced-concrete units was begun in the early 1940’s. After the Great Patriotic War several long-span reinforced-concrete arch bridges were built, including one across the Dnieper with a span of 228 m. In the USSR, valuable contributions to the science and practice of bridge-building were made by G. P. Perederii, Streletskii, G. K. Evgrafov, and E. E. Gibshman; contributions abroad were made by E. Freyssinet, F. Leonhardt, R. Maillart, and R. Morandi.

Structural configurations of modern bridges. In contemporary bridge-building the principal structural members of metal bridges are made from mild and low-alloy steels; aluminum alloys are sometimes used. Solid metal beams of the same or different heights are usually used for the construction of metal railroad bridges with spans of up to 80 m and highway bridges with spans of up to 300 m. The main beams are interconnected by means of couplings. A reinforced-concrete slab for the roadway is placed over the beams. The slab is joined by special supports to the main metal beams, thus providing for their joint functioning and, as a result, reducing the quantity of metal in the structure (such bridges are called steel reinforced-concrete types; see Figure 3). Box-type main beams made of steel sheets reinforced internally by longitudinal ribs and transverse plates are also used. The slab for the roadway on such beams is made of reinforced concrete or metal. Such spans are economical, light, and rigid, which makes possible their use for large spans (up to 300 m). Metal span structures in the form of through trusses are used for the largest spans (more than 500 m). Through trusses are more economical than solid beams but are more difficult to fabricate and assemble. For the construction of a railroad track or motor-vehicle road, longitudinal and transverse beams are laid down between the trusses for the roadway, and a reinforced-concrete slab or rails are laid on the beams.

Figure 3. Span with continuous I-beams: (1) main beams, (2) reinforced-concrete slab for roadway, (3) roadway surfacing, (4) sidewalks, (5) braces

Metal arch bridges are constructed to cover spans of up to 500 m (if the foundation soils are solid). They are usually built in mountainous areas. One of the largest arch bridges crosses the Vltava River in Czechoslovakia (1967) and has a span of about 320 m.

Suspension bridges are built to cover spans exceeding 1, 000 m (for example, when crossing the mouths of deep rivers, bays, and straits, where the construction of a great number of piers is complicated and uneconomical). The cables of such bridges are made of high-strength steel wires arranged in parallel or twisted into a rope. The towers of a suspension bridge are usually box-type and made of metal; they are sometimes made from reinforced concrete. The Verrazano-Narrows Bridge (USA, 1964) has the longest span (1, 298 m).

Guy bridges are becoming more common for spans of 150–350 m. The guys that support the stiffening girder may converge at the peak of the tower or run parallel to one another. Asymmetrical single-tower arrangements are in use (a bridge across the Rhine River at Cologne, 1959). The stiffening I-beams or box beams of suspension and guy bridges are kept level by hangers or guys. For large spans (more than 500 m), the main beams are replaced by through trusses.

Reinforced-concrete bridges are divided into cast and prefabricated types. Cast bridges are poured at the construction site; prefabricated bridges are assembled from separate components that are made in special plants for reinforced-concrete structural members or at on-site areas. Reinforced-concrete girder bridges usually have a slab for the roadway and sidewalks, as well as crossbeams (plates) and main beams. The roadway slab forms part of the main beams. In the USSR extensive use is made of spans prefabricated from separate beams that cover the entire span and are interconnected by poured seams in the roadway and plate slabs and by welded metal insertion elements. If the beam reinforcement is prestressed, the beams can be divided lengthwise into individual blocks, which are delivered to the construction site from the plants. The tensioned reinforcement squeezes the blocks together, forming a beam.

Solid reinforced-concrete cantilever and frame bridges with spans of 50–200 m have become widespread. The main beams of such bridges are usually box-type beams. The most efficient means of cantilever-type construction of bridges are the frame-suspension and cantilever-frame systems, because tension for the collar beams of T-shaped frames, both during assembly and in use, arises at the upper edge, and reinforcement is needed only at the top. For continuous beams, bottom reinforcement is also necessary, which greatly complicates the work. On the other hand, there are no discontinuities in the contour of continuous beams; therefore, there has been a notable tendency toward more extensive use of continuous beams in modern bridges. In bridge-building practice there are examples of reinforced-concrete bridges with spans in the form of through trusses. However, the complexity of connecting the reinforced-concrete elements at the truss joints restricts their use.

Reinforced-concrete arch bridges with solid or free-standing arches are used for spans from 50–60 m to 200–300 m. In the USSR arch bridges are usually made from prefabricated reinforced concrete. Arch-cantilever bridges in which two half-arches are joined at the top by tie beams to form a T-shaped frame are also built. A number of large bridges have been built using this system (for example, the subway bridge in Kiev).

As motor-vehicle transportation develops, complicated, multitiered bridge-type structures are being built on highways, particularly in the cities; they curve both vertically and horizontally and consist of reinforced-concrete or steel trestles and overpasses. The curvilinear spans frequently have a box-shaped cross section.

The piers of modern metal and reinforced-concrete bridges are usually made of light cast concrete or prefabricated reinforced concrete on a natural or pile foundation.

Construction. The installation of piers is the most time-consuming, labor-intensive, and costly process in the construction of a bridge (up to 50 percent of the total cost). The hydrogeological conditions determine whether the piers are constructed in open excavations or by driving piles, massive cofferdams, caissons, and prefabricated reinforced-concrete casings. For the piers of small and medium bridges in modern construction, extensive use is made of reinforced-concrete piles, which are driven into the ground by steam, diesel, or electric vibratory pile drivers; for the construction of large bridges, tubular prefabricated reinforced-concrete shells up to 3 m in diameter are sunk by vibration pile driving or drilling.

Spans are usually erected by methods that avoid the construction of continuous falsework in river beds. Small and medium spans or large portions of them are hoisted into position on the piers by erecting cranes with a lifting capacity of up to 130 tons. For larger spans, the span is assembled on shore and then transported or floated on pontoons and placed on the piers. The most common method of bridge erection is the cantilever type, in which the structure is built out from the piers across the span. Metal spans are assembled by a crane that moves along the finished portion; the bridge elements move under the crane along a track on the assembled span. For reinforced-concrete spans, the cantilever-type method of assembly (developed in the USSR) includes the fabrication of the individual structural elements (units) at a plant and their delivery to the assembly site (usually by water) and placement in the desired location by special cranes. The joints between blocks are filled with cement mortar; adhesive joints between blocks are also used. Blocks are frequently joined by locking beams that are installed with the same cranes. Outside the USSR, the cantilever-type concreting method is used in addition to cantilever-type assembly: a sliding casing is suspended from the completed portion of a structure, the span portion is concreted, and the reinforcement is tensioned after the concrete has set. The erection of suspension bridges begins with the towers, and then temporary cables are hung and used to lay up the main cables. The final step is installation of the hangers and a stiffening beam.

Construction in the USSR is carried out by specialized organizations (bridge-building teams, trains, and mobile task forces), which are provided with equipment, mechanisms, cranes with a large lifting capacity, and stock auxiliary structural members. Bridges are usually constructed by industrial methods; only prefabricated structures are assembled at the site. All new bridges undergo tests (for temporary, moving loads), which are conducted by specialized bridge-testing stations.

Calculations. Calculations for bridges are performed mainly by the method of limiting states. Each portion of a bridge (the spans and the supports) must satisfy requirements for strength, deflection, and crack resistance under the most unfavorable combination of loads on the structure. Two kinds of loads act on a bridge: constant loads (the weight of the bridge itself and the preliminary stress on the reinforcement) and temporary loads (the weight of railroad trains or columns of motor vehicles and crowds of people on the sidewalks, tracked or wheeled live loads, wind and ice pressure, collisions of ships with the piers, impacts of traffic on the rails or sidewalks, and the forces produced by sudden braking). In seismic areas, an allowance is made for the inertia loads that arise during earthquakes. All load calculations are standardized with regard to the existing traffic load and the prospects for its increase. Methods of bridge design are based on achievements in mathematics, structural mechanics, the theory of strength of materials, and other sciences. Electronic computers are used extensively for calculations.

Trends in the development of bridge-building. The modern trend in bridge-building is characterized by increased use of prefabricated components and factory-made parts, the introduction of industrial production and operating methods, and the mechanization of the basic technological processes, along with the further development of structural systems for bridges and an increase in their maximum span.

The use of high-strength steels and light alloys and the use of welding instead of riveting is increasing in bridge construction; the structural shape of spans is being improved through the use of rigid box-type sheet components. In reinforced-concrete bridge-building the use of thin-wall components made of high-strength concrete is acquiring increasing importance, as are the standardization of the prefabricated elements for spans and piers, the creation of new types of prestressed components, and the development of standard casings and erecting units.

REFERENCES

Nadezhin, B. M. Mosty i puteprovody v gorodakh. Moscow, 1964.
Gibshman, E. E. Proektirovanie dereviannykh mostov. Moscow, 1965.
Gibshman, E. E. Proektirovanie metallicheskikh mostov. Moscow, 1969.
Evgrafov, G. K. , and N. N. Bogdanov. Proektirovanie mostov. Moscow, 1966.
Stroitel’stvo mostov. Moscow, 1966.
II’iasevich, S. A. Metallicheskie korobchatye mosty. Moscow, 1970.
Nazarenko, B. P. Zhelezobetonnye mosty, 2nd ed. Moscow, 1970.N. N. BOGDANOV and M. E. GIBSHMANArchitecture. Many bridges are outstanding monuments to architecture and engineering skill. In masonry bridges, the most common type of bridge until the second half of the 19th century, the massive abutments and spans, which necessitated large quantities of construction materials, visually embodied the concepts of stability, strength, and reliability.
A union of architecture and engineering skill was achieved in the bridges of ancient Rome. The expressive architectonics of the massive, multiple-arch construction, almost devoid of decoration, imparts to the bridge a sense of stark power, which is characteristic of the utilitarian edifices of ancient Rome (the Alcántara bridge across the ravine of the Tagus River in Spain, A.D. 98–106, builder Gaius Julius Lacer). In metal bridge components, maximum use is made of the mechanical and physical properties of the material (metal withstands tensile forces well). Because of this quality, metal bridges became less massive than masonry bridges and acquired a more delicate outline, which is an important artistic feature (the bridge across the Douro River at Porto, Portugal, 1881–85, engineer A. G. Eiffel). Metal bridges with efficient engineering and architectural treatments have affected the architectural styles of the 20th century.
Reinforced-concrete bridges are sculpturally expressive. The dynamism and visual lightness of form often impart a singular elegance to large structures (the bridge across the Arve River in Switzerland, 1936; engineer R. Maillart). The substantial dimensions, large shapes, and distinctive outline of bridges influence the architectural aspect of a city (for example, bridges in Leningrad, Prague, and Budapest). Therefore, the structural and architectural-spatial treatment of a municipal bridge must take into account the specific conditions of its location and the natural and architectural environment.
A particularly important and complicated urban-planning problem is the search for a harmonious combination of the outline, scale, and structural design of a bridge with the long-established buildings of old cities that are often valuable from a historical and artistic standpoint. An example of a successful solution is the Alexander Nevsky bridge across the Neva River in Leningrad (1965, engineers A. S. Evdonin and others, architects Iu. I. Sinitsa and others). By repeating the outline of the other Neva bridges over the water, it is made commensurate with the scale of the river and the buildings on its esplanades.

E. K. IVANOVA


Bridge

 

an electrical device used to measure resistance, capacitance, inductance, and other electrical quantities. It consists of a bridge circuit, whose operation is based on comparison of the quantity being measured with a standard value of the quantity. The comparison method yields very accurate results; therefore, bridges are widely used in laboratories and industrial practice.

The simplest type of DC bridge, used in measuring effective (ohmic) resistance, is shown in Figure 1. The supply voltage (current) is connected to the input terminals A and B (on the supply diagonal). A null indicator or measuring instrument is connected to the output terminals C and D (on the measuring diagonal). By adjusting one or more variable resistors, the potentials at the points C and D can be made equal. Equilibrium is achieved when the null indicator shows no current flowing through the measuring diagonal (that is, the bridge is balanced).

Figure 1. Circuit of a DC Wheat-stone bridge: (E) current source; (G) galvanometer (null indicator); (AC), (CB), (BD), and (DA) bridge arms; (Rx) resistance being measured; (R2), (R3), and (R4) calibrated variable resistances

For the balanced condition of a bridge, the ratio of the resistances of the arms is given by the equation R1·R4 = R2·R3 (the equilibrium condition). To measure a resistance Rx, it is connected in one arm of the bridge—for example, as the resistance R1, If the bridge is balanced, Rx = (R2 · R3)/R4. In this method the accuracy of measurement of Rx is determined by the precision of the calibrated resistances R2, R3, and R4 and by the sensitivity of the null indicator.

The Wheatstone (four-arm) bridge shown in Figure 1 is commonly used for measuring resistances R≧1 ohm (Ω). The results of measurement of resistances R < 1 Ω with a Wheat-stone bridge are significantly affected by the resistances of the connecting leads and by contact resistances, since they are becoming commensurate with Rx. To measure resistances from 1 microhm (μΩ) to 1 Ω, double or multiarm bridges are used. Combined single and double bridges exist that are capable of measuring resistances from 1 μ to 1 Ω with an error of the order of ± 0.002 percent. Sometimes the resistances are not varied, and the results of measurement are recorded by an instrument calibrated in units of the quantity being measured and connected to the measuring diagonal; this is called the unbalanced-bridge method.

Balanced AC bridges are used to measure capacitance, inductance, coefficient of mutual inductance, and so on. The results of measurement of such quantities depend on the frequency of the voltage supplied to the bridge; therefore, measurements are usually made at some specified constant frequency. The basic circuit of an AC bridge is similar to the one shown in Figure 1, with the difference that each arm may contain an inductance coil, a capacitor, and a resistor. An AC bridge is usually balanced by adjusting two components rather than one, since the balancing of such a bridge depends on the ratio of the impedances of its arms, which in the presence of capacitances and inductances are complex quantities. The magnitudes of the quantities being measured are determined from the conditions of balancing of the bridge.

Measuring generators operating at audio frequency are the most common source of alternating current for AC bridges. Industrial alternating current (50 hertz) is used less frequently. A moving-coil galvanometer is used as the null indicator for a DC bridge; vibration galvanometers, telephones, electronic pointer indicators, or electron-beam instruments are used for AC bridges. In modern bridges the balancing process is automated, and the results of a measurement are displayed as a number on a readout device. Such instruments are called digital bridges.

REFERENCES

Gorodovskii, A. F. Mosty postoiannogo toka. Moscow-Leningrad, 1964.
Nizhnii, S. M. Mosty peremennogo toka. Moscow-Leningrad, 1966.
Shkurin, G. P. Spravochnik po elektro- i elektronno-izmeritel’nym priboram. Moscow, 1972.

G. P. SHKURIN


Bridge

 

of a ship. (1) Navigational, or captain’s, bridge, an elevated superstructure on the upper deck of a ship that provides an all-around view; it houses the equipment and instruments required to run the ship, as well as facilities for visual or acoustic signals.

(2) Fore-and-aft bridge (gangway), constructed to run lengthwise above the upper deck of a ship (usually a tanker) to connect the ship’s superstructures. It permits the crew to move about safely during a storm.

What does it mean when you dream about a bridge?

Bridges often indicate literal travel. They also frequently represent life transitions. Because bodies of water symbolize the subconscious as well as the emotions, a bridge may indicate a structure that keeps one from falling into one’s subconscious or into one’s emotions (as in “bridge over troubled water”). Bridges are also links between two otherwise separated shores. Any one of these connotations might be indicated, and thus bridge images must be interpreted in the larger context of the dream.

bridge

[brij] (civil engineering) A structure erected to span natural or artificial obstacles, such as rivers, highways, or railroads, and supporting a footpath or roadway for pedestrian, highway, or railroad traffic. (communications) A device that joins two networks of the same type. (electricity) An electrical instrument having four or more branches, by means of which one or more of the electrical constants of an unknown component may be measured. An electrical shunt path. (mathematics) A line whose removal disconnects a component of a graph. Also known as isthmus. (mining engineering) A piece of timber held above the cap of a set by blocks and used to facilitate the driving of spiling in soft or running ground. (naval architecture) An elevated structure extending across or over the weather deck of a vessel, containing stations for control and visual communications. (organic chemistry) A connection between two different parts of a molecule consisting of a valence bond, an atom, or an unbranched chain of atoms. (petroleum engineering) An obstruction in a borehole resulting from the wall caving or the presence of a large boulder. A device installed in a borehole either permanently or temporarily to retain cement or other material.

Bridge

A structure built to provide ready passage over natural or artificial obstacles, or under another passageway. Bridges serve highways, railways, canals, aqueducts, utility pipelines, and pedestrian walkways. In many jurisdictions, bridges are defined as those structures spanning an arbitrary minimum distance, generally about 10–20 ft (3–6 m); shorter structures are classified as culverts or tunnels. In addition, natural formations eroded into bridgelike form are often called bridges. This article covers only bridges providing conventional transportation passageways.

Bridges generally are considered to be composed of three separate parts: substructure, superstructure, and deck. The substructure or foundation of a bridge consists of the piers and abutments which carry the superimposed load of the superstructure to the underlying soil or rock. The superstructure is that portion of a bridge or trestle lying above the piers and abutments. The deck or flooring is supported on the bridge superstructure; it carries and is in direct contact with the traffic for which passage is provided.

Bridges are classified in several ways. Thus, according to the use they serve, they may be termed railway, highway, canal, aqueduct, utility pipeline, or pedestrian bridges. If they are classified by the materials of which they are constructed (principally the superstructure), they are called steel, concrete, timber, stone, or aluminum bridges. Deck bridges carry the deck on the very top of the superstructure. Through bridges carry the deck within the superstructure. The type of structural action is denoted by the application of terms such as truss, arch, suspension, stringer or girder, stayed-girder, composite construction, hybrid girder, continuous, cantilever, or orthotropic (steel deck plate).

The two most general classifications are the fixed and the movable. In the former, the horizontal and vertical alignment of the bridge are permanent; in the latter, either the horizontal or vertical alignment is such that it can be readily changed to permit the passage beneath the bridge of traffic. Movable bridges are sometimes called drawbridges in an anachronistic reference to an obsolete type of movable bridge spanning the moats of castles.

A singular type of bridge is the floating or pontoon bridge, which can be a movable bridge if it is designed so that a portion of it can be moved to permit the passage of water traffic.

The term trestle is used to describe a series of short spans supported by braced towers, and the term viaduct is used to describe a high structure of short spans, often of arch construction.

Fixed bridges

This type of construction is selected when the vertical clearance provided beneath the bridge exceeds the clearance required by the traffic it spans. For very short spans, construction may be a solid slab or a number of beams; for longer spans, the choice may be girders or trusses. Still longer spans may dictate the use of arch construction, and if the spans are even longer, stayed-girder bridges are used. Suspension bridges are used for the longest spans.

Beam bridges consist of a series of beams, usually of rolled steel, supporting the roadway directly on their top flanges. The beams are placed parallel to traffic and extend from abutment to abutment. Plate-girder bridges are used for longer spans than can be practically traversed with a beam bridge. In its simplest form, the plate girder consists of two flange plates welded to a web plate, the whole having the shape of an I. Box-girder bridges have steel girders fabricated by welding four plates into a box section. A conventional floor beam and stringer can be used on box-girder bridges, but the more economical arrangement is to widen the top flange plate of the box so that it serves as the deck. When this is done, the plate is stiffened to desired rigidity by closely spaced bar stiffeners or by corrugated or honeycomb-type plates. These stiffened decks, which double as the top flange of the box girders, are termed orthotropic. The wearing surface on such bridges is usually a relatively thin layer of asphalt.

Truss bridges, consisting of members vertically arranged in a triangular pattern, can be used when the crossing is too long to be spanned economically by simple plate girders. Where there is sufficient clearance underneath the bridge, the deck bridge is more economical than the through bridge because the trusses can be placed closer together, reducing the span of the floor beams.

The continuous bridge is a structure supported at three or more points and capable of resisting bending and shearing forces at all sections throughout its length. The bending forces in the center of the span are reduced by the bending forces acting oppositely at the piers. Trusses, plate girders, and box girders can be made continuous. The advantages of a continuous bridge over a simple-span bridge (that is, one that does not extend beyond its two supports) are economy of material, convenience of erection (without need for falsework), and increased rigidity under traffic. The disadvantages are its sensitivity to relative change in the levels of supporting piers, the difficulty of constructing the bridge to make it function as it is supposed to, and the occurrence of large movements at one location due to thermal changes.

The cantilever bridge consists of two spans projecting toward each other and joined at their ends by a suspended simple span. The projecting spans are known as cantilever arms, and these, plus the suspended span, constitute the main span. The cantilever arms also extend back to shore, and the section from shore to the piers offshore is termed the anchor span. Trusses, plate girders, and box girders can be built as cantilever bridges. The chief advantages of the cantilever design are the saving in material and ease of erection of the main span. The cable-stayed bridge, a modification of the cantilever bridge which has come into modern use, resembles a suspension bridge. It consists of girders or trusses cantilevering both ways from a central tower and supported by inclined cables attached to the tower at the top or sometimes at several levels.

The suspension bridge is a structure consisting of either a roadway or a truss suspended from two cables which pass over two towers and are anchored by backstays to a firm foundation. If the roadway is attached directly to the cables by suspenders, the structure lacks rigidity, with the result that wind loads and moving live loads distort the cables and produce a wave motion on the roadway. When the roadway is supported by a truss which is hung from the cable, the structure is called a stiffened suspension bridge. The stiffening truss distributes the concentrated live loads over a considerable length of the cable.

Since the development of the prestressing method, bridges of almost every type are being constructed of concrete. Prior to the advent of prestressing, these bridges were of three types: (1) arches, which were built in either short or long spans; (2) slab bridges of quite short spans, which were simply reinforced concrete slabs extending from abutment to abutment; and (3) deck girder bridges, consisting of concrete slabs built integrally with a series of concrete girders placed parallel to traffic. The advent of prestressed concrete greatly extended the utility and economy of concrete for bridges, particularly by making the hollow box-girder type practicable. See Prestressed concrete

Movable bridges

Modern movable bridges are either bascule, vertical lift, or swing; with few exceptions, they span waterways. They are said to be closed when set for the traffic they carry, and open when set to permit traffic to pass through the waterway they cross. Bascule and swing bridges provide unlimited vertical clearance in the open position. The vertical clearance of a lift bridge is limited by its design.

The bascule bridge consists primarily of a cantilever span, which may be either a truss or a plate girder, extending across the channel. Bascule bridges rotate about a horizontal axis parallel with the waterway. The portion of the bridge on the land side of the axis, carrying a counterweight to ease the mechanical effort of moving the bridge, drops downward, while the forward part of the leaf opens up over the channel much like the action of a playground seesaw. Bascule bridges may be either single-leaf, where rotation of the entire leaf over the waterway is about one axis on one side of the waterway, or double-leaf, where the leaves over the waterway rotate about two axes on opposite sides of the waterway.

The vertical-lift bridge has a span similar to that of a fixed bridge and is lifted by steel ropes running over large sheaves at the tops of its towers to the counterweights, which fall as the lift span rises and rise as it falls. If the bridge is operated by machinery on each tower, it is known as a tower drive. If it is driven by machinery located on the lift span, it is known as a span drive.

Swing bridges revolve about a vertical axis on a pier, called the pivot pier, in the waterway. There are three general classes of swing bridges: the rim-bearing, the center-bearing, and the combined rim-bearing and center-bearing. Rim-bearing bridges are supported on circular girder drums on rollers, center-bearing on a single large bearing at the center of rotation.

Substructure

Bridge substructure consists of those elements that support the trusses, girders, stringers, floor beams, and decks of the bridge superstructure. Piers and abutments are the primary bridge substructure elements. Other types of substructure, such as skewbacks for arch bridges, pile bents for trestles, and various forms of support wall, are also commonly used for specific applications.

Degradation

Many factors can cause bridges to degrade and become structurally deficient and in need of repair. Two environmental factors that cause significant damage to primarily concrete components in bridges are excessive changes in temperature and freeze-thaw cycles in the presence of moisture. Steel structures are vulnerable to corrosion, especially in prolonged moisture environments. Use of deicing salts on concrete pavements and bridge decks produces chemical reactions that accelerate the corrosion of reinforcing steel. A significant cause of bridge damage is vehicular impact and fatigue from repeated truck loads. Special loads, such as seismic, wind, and snow, also may produce dramatic degradation of bridge structures. See Mechanical vibration

Strengthening techniques

The strengthening of concrete bridges is generally achieved by replacing the damaged material, incorporating additional structural members, as in external prestressing, or increasing the size and capacity of existing members.

Repair techniques

Numerous repair techniques have evolved for concrete members in both bridges and buildings for replacing damaged concrete, repairing cracks, and repairing corroded reinforced steel bars. Steel bridges are most often strengthened by the addition of new steel members or smaller elements. Steel welding and bolting are well-developed techniques for steel connections. Thus, strengthening of steel bridges is perhaps more defined than for the concrete bridges. Techniques for repairing steel bridge elements include flame straightening, hot mechanical straightening, cold mechanical straightening, welding, bolting, partial replacement and complete replacement.

bridge

1. A structure that spans a depression or provides a passage between two points which are at a height above the ground affording a passage for pedestrians, vehicles, etc. 2. At a demolition or construction site, a scaffold built over the adjacent sidewalk to protect pedestrians and motor vehicles from falling material or debris. 3. In the backstage of a theater, a platform or gallery (of fixed or adjustable height), over or alongside the stage; used by scene painters (see paint bridge), lighting operators (see light bridge), and stagehands.

Bridge

Al Siratfine as razor’s edge, over which all must pass to enter paradise. [Islam: Koran]AmauroteUtopian crossing; means “faintly seen.” [Br. Lit.: Utopia]Bifrostrainbow of water and fire for gods’ passage from Asgard to Midgard. [Norse Myth.: Leach, 139]Bridge of San Luis Reyrope bridge in Andes which breaks, killing five people. [Am. Lit.: Bridge of San Luis Rey]Brooklyn Bridgesuspension bridge spanning the East River from Manhattan to Brooklyn. [Am. Hist.: EB, II: 301]Golden Gate Bridgesuspension bridge in San Francisco spanning the Golden Gate. [Am. Hist.: EB, IV: 607]London Bridgea bridge spanning the Thames at London; (not the Tower Bridge). [Br. Hist.: EB, VI: 311]River Kwai Bridgebridge built by British POWs under Japanese orders. [Jap. Hist.: Bridge Over the River Kwai]Xerxesconstructed famed pontoon crossing of Hellespont. [Gk. Hist.: Brewer Dictionary, 1169]

bridge

11. a structure that spans and provides a passage over a road, railway, river, or some other obstacle 2. a. the hard ridge at the upper part of the nose, formed by the underlying nasal bones b. any anatomical ridge or connecting structure 3. a dental plate containing one or more artificial teeth that is secured to the surrounding natural teeth 4. a platform athwartships and above the rail, from which a ship is piloted and navigated 5. a piece of wood, usually fixed, supporting the strings of a violin, guitar, etc., and transmitting their vibrations to the sounding board 6. a passage in a musical, literary, or dramatic work linking two or more important sections 7. Electronics any of several networks, such as a Wheatstone bridge, consisting of two branches across which a measuring device is connected. The resistance, capacitance, etc., of one component can be determined from the known values of the others when the voltage in each branch is balanced 8. Computing a device that connects networks and sends packets between them 9. Billiards Snookera. a support for a cue made by placing the fingers on the table and raising the thumb b. a cue rest with a notched end for shots beyond normal reach 10. Theatrea. a platform of adjustable height above or beside the stage for the use of stagehands, light operators, etc b. Chiefly Brit a part of the stage floor that can be raised or lowered 11. a partition in a furnace or boiler to keep the fuel in place
www.worldbridge.org

bridge

2 a card game for four players, based on whist, in which one hand (the dummy) is exposed and the trump suit decided by bidding between the players
www.worldbridge.org

Bridge

Frank. 1879--1941, English composer, esp of chamber music. He taught Benjamin Britten

BRIDGE

(1)A component of ICES for civil engineers.

[Sammet 1969, p. 616].

bridge

(networking, hardware)A device which forwards traffic betweennetwork segments based on data link layer information.These segments would have a common network layer address.

Every network should only have one root bridge.

See also gateway, router.

bridge

(1) To cross from one circuit, channel or element over to another.

(2) See Wi-Fi bridge, wireless bridge and conference bridge.

(3) A device that connects two LAN segments together. Bridges are inserted into the network to keep traffic contained within the segments to improve performance. By monitoring which station acknowledged receipt of the address, bridges learn which nodes belong to the segment and maintain their own address tables. Multiport bridges have more than two ports and perform a switching function like a LAN switch.

Bridges vs. Routers
Bridges work at the non-routable data link layer 2 and are not concerned with the network protocol (typically IP). Routers work at the routable layer 3 and inspect the network protocol. Since bridges do not have to glean routing information, they are faster than routers.

A type of bridge that connects disparate networks, such as Ethernet and Token Ring, is called a bridge router. See LAN, transparent bridge, repeater, router, gateway and hub.


Bridge

(dreams)There are many meanings that you could give to this symbol. The details in the dream are just as important as the bridge itself. The first consideration should be given to how much you travel. The bridge can be interpreted literally if it is a part of your daily commute. On a more theoretical level, bridges can symbolize transitions (e. g., transition from one stage to another, from one level of consciousness to another). Since most bridges are over water (i. e., emotions, unconscious), this dream could also be symbolic of your rising above your emotional difficulties or unconscious drives.

bridge


bridge

 [brij] 1. a denture" >fixed partial denture; see illustration. A bridge unit serves to restore a functional unit by replacing one or more missing teeth. A fixed bridge consists of abutment and pontic teeth splinted together. From Darby and Walsh, 1995.pons.2. a protoplasmic structure uniting adjacent elements of a cell, similar in plants and animals.conjugative bridge in bacterial conjugation, a connection formed between two bacterial cells by the attachment of an F pilus from an F+ cell to an F cell.disulfide bridge disulfide bond.

bridge

(brij), 1. The upper part of the ridge of the nose formed by the nasal bones. 2. One of the threads of protoplasm that appear to pass from one cell to another. 3. Synonym(s): fixed partial denture

bridge

(brĭj)n.1. a. The upper bony ridge of the human nose.b. The part of a pair of eyeglasses that rests against this ridge.2. A fixed or removable replacement for one or several but not all of the natural teeth, usually anchored at each end to a natural tooth.3. Chemistry An intramolecular connection that spans atoms or groups of atoms.
bridge′a·ble adj.

BRIDGE

Beta Radiation Investigation With Direct Stenting and Galileo in Europe. A study which evaluated intracoronary 32P radiation and the Galileo Radiotherapy System after direct Multi-Link Rx Tetra coronary stenting.
 
Conclusion
32P intravascular brachytherapy reduces in-stent neointimal proliferation and restenosis; thrombosis was a major problem.

bridge

Dentistry A fixed partial denture; a prosthetic replacement of missing teeth cemented or attached to abutment teeth or implants adjacent to the space; removable partial denture is a prosthetic replacement of missing teeth on a framework that can be removed by a Pt Physical therapy An exercise in which a person lays on his/her back with bended knees, while lifting the pelvis, placing thighs, back and pelvis in a straight line, strengthening abdominal, lower back, gluteus and hamstring muscles Transplantation medicine An organ surrogate that carries out a particular physiologic function and “buys time” for a Pt awaiting a donor organ for transplantation

bridge

(brij) 1. The upper part of the ridge of the nose formed by the nasal bones. 2. One of the threads of protoplasm that appear to pass from one cell to another. 3. Synonym(s): fixed partial denture.

bridge

(brij) 1. The upper part of the external nose formed by the junction of the nasal bones.2. The curved part of a pair of eyeglasses that rests on the bridge of the nose. 3. A narrow band of tissue. 4. A cast dental restoration that replaces missing teeth. The restoration is usually made of gold alloy, with or without a porcelain exterior, and is attached to adjacent or abutment teeth for support. 4. The use of a short-acting drug when treatment with a longer-acting drug must be temporarily interrupted or during the initiation of the long-acting drug before it reaches full therapeutic effectiveness.

Patient care

Bridging is commonly used for perioperative anticoagulation. In patients who have atrial fibrillation or a history of blood clotting, warfarin, which has a relatively long half-life, is withheld several days before surgery. The bridge consists of the administration of low-molecular-weight heparins (LMWHs), which have a shorter half-life, until about 12 hr before the procedure in order to prevent clotting. At a safe time after the operation, LMWHs are reinstituted until warfarin reaches therapeutic levels, e.g., an international normalized ratio of 2 or more. The duration of bridging therapy varies but is typically between 2 days and 1 week.

BRIDGING5. An exercise for activating the abdominal and hip extensor muscles. The patient lies on his back with knees flexed and feet flat against a horizontal surface, such as a floor, bed, or plinth (treatment table). The patient then lifts his hips while his feet, shoulders, and head maintain contact with the surface. Bridging is often recommended as part of preprosthetic training for patients with transtibial or transfemoral lower extremity amputations. See: illustration

CAUTION!

Bridging should always be performed while the prosthesis is removed.

disulfide bridge

Disulfide bond.

bridge

A fixed support for false teeth which bridges across the gap between surviving natural teeth.

Bridge

An appliance of one or more artificial teeth anchored by crowns on the adjacent teeth.Mentioned in: Tooth Replacements and Restorations

bridge 

That part of a spectacle frame which forms the main connection between the lenses or rims. The bridge assembly is generally taken to include the pads, if any (British Standard). See spectacles.
flush bridge The bridge of a spectacle frame with zero projection.
inset bridge A spectacle frame so shaped that the bearing surface of the bridge is behind the plane of the lenses.
keyhole bridge Bridge of a spectacle frame with pads, looking like the outline of the upper part of a keyhole.
pad bridge A bridge of a spectacle frame with two pads acting as the resting surface on the nose.
saddle bridge A bridge so shaped as to rest on the nose over a continuous area, but in which the ends of the bearing surface are extended to lie behind the back plane of the front (British Standard).

bridge

(brij) 1. The upper part of the ridge of the nose formed by the nasal bones. 2. One of the threads of protoplasm that appear to pass from one cell to another. 3. Synonym(s): fixed partial denture.

Bridge


Related to Bridge: Bridge game

BRIDGE. A building constructed over a river, creek, or other stream, or ditch or other place, in order to facilitate the passage over the same. 3 Harr. 108.
2. Bridges are of several kinds, public and private. Public bridges may be divided into, 1st. Those which belong to the public; as state, county, or township bridges, over which all the people have a right to pass, with or without paying toll these are built by public authority at the public expense, either of the state itself, or a district or part of the state.
3. - 2d. Those which have been built by companies, or at the expense of private individuals, and over Which all the people have a right to pass, on the payment of a toll fixed by law. 3d. Those which have been built by private individuals and which have been dedicated to public uses. 2 East, R. 356; 5 Burr. R. 2594; 2 Bl. R. 685 1 Camp. R. 262, n.; 2 M. & S. 262.
4. A private bridge is one erected for the use of one or more private persons; such a bridge will not be considered a public bridge, although it may be occasionally used by the public. 12 East, R. 203-4. Vide 7 Pick. R. 844; 11 Pet. R. 539; 7 N. H. Rcp. 59; 1 Pick. R. 432; 4 John. Ch. R. 150.

Bridge


Bridge

1. In broadcasting, a fade-out between two scenes indicating a transition.

2. An advertisement in a magazine or other periodical that goes across two pages.
See BRDG

BRIDGE


AcronymDefinition
BRIDGEBehavioral Research in Diabetes Group Exchange (professional society)
BRIDGEBuilding Relationships in Diverse Geographic Environments (political action community)
BRIDGEBuilding Radio frequency Identification solutions for the Global Environment (IAIK group project, Graz, Austria)
BRIDGEBuilding Resources in Democracy, Governance and Elections (Melbourne, Victoria, Australia)
BRIDGEBiotechnology Research for Innovation, Development and Growth in Europe
BRIDGEBaltimore Regional Initiative Developing Genuine Equality, Inc. (Baltimore, MD)
BRIDGEBehavioral Rating Inventory for Drug-Generated Effects (biological psychiatry)

bridge


Related to bridge: Bridge game
  • all
  • noun
  • verb

Synonyms for bridge

noun arch

Synonyms

  • arch
  • span
  • viaduct
  • aqueduct
  • flyover
  • overpass

noun link

Synonyms

  • link
  • tie
  • bond
  • connection

verb span

Synonyms

  • span
  • cross
  • go over
  • cross over
  • traverse
  • reach across
  • extend across
  • arch over

verb reconcile

Synonyms

  • reconcile
  • unite
  • resolve
  • overcome

Antonyms

  • separate
  • split
  • divide
  • widen
  • sever
  • keep apart
  • sunder

Synonyms for bridge

noun a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc

Synonyms

  • span

Related Words

  • arch
  • Bailey bridge
  • cantilever bridge
  • cattle grid
  • cattle guard
  • covered bridge
  • drawbridge
  • lift bridge
  • footbridge
  • overcrossing
  • pedestrian bridge
  • flyover
  • overpass
  • pier
  • bateau bridge
  • floating bridge
  • pontoon bridge
  • rope bridge
  • steel arch bridge
  • structure
  • construction
  • suspension bridge
  • toll bridge
  • transportation
  • transportation system
  • transit
  • trestle
  • trestle bridge
  • truss bridge
  • viaduct

noun a circuit consisting of two branches (4 arms arranged in a diamond configuration) across which a meter is connected

Synonyms

  • bridge circuit

Related Words

  • circuit
  • electric circuit
  • electrical circuit
  • Wheatstone bridge

noun something resembling a bridge in form or function

Related Words

  • connection
  • connexion
  • connectedness

noun the hard ridge that forms the upper part of the nose

Related Words

  • anatomical structure
  • bodily structure
  • body structure
  • complex body part
  • structure
  • nasal bone
  • os nasale
  • nasal
  • nose
  • olfactory organ

noun any of various card games based on whist for four players

Related Words

  • card game
  • cards
  • bridge whist
  • auction
  • auction bridge
  • contract bridge
  • contract
  • trumping
  • ruff
  • major suit
  • minor suit
  • stopper
  • bidding
  • bid
  • declaration
  • takeout
  • overcall
  • overbid
  • slam
  • sweep
  • doubleton
  • raise
  • declare
  • outbid
  • preempt

noun a wooden support that holds the strings up

Related Words

  • stringed instrument
  • support

noun a denture anchored to teeth on either side of missing teeth

Synonyms

  • bridgework

Related Words

  • dental plate
  • denture
  • plate

noun the link between two lenses

Synonyms

  • nosepiece

Related Words

  • linkup
  • tie-in
  • link
  • tie
  • eyeglasses
  • glasses
  • specs
  • spectacles

noun an upper deck where a ship is steered and the captain stands

Synonyms

  • bridge deck

Related Words

  • conning tower
  • fly bridge
  • flybridge
  • flying bridge
  • monkey bridge
  • pilothouse
  • wheelhouse
  • upper deck

verb connect or reduce the distance between

Synonyms

  • bridge over

Related Words

  • connect
  • link
  • link up
  • tie
  • bridge over
  • tide over
  • keep going

verb make a bridge across

Related Words

  • bring together
  • join

verb cross over on a bridge

Related Words

  • cross
  • cut across
  • cut through
  • get over
  • traverse
  • pass over
  • get across
  • track
  • cover
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