土木工程桥梁专业英语.ppt

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1、BRIDGESHistoryofBridgeDevelopmentClapperBridgeRomanArchBridgeZhaozhouBridgeCoveredBridgeTowerBridgeBrooklynBridgeAkashiKaikyōBridgeHistoryofBridgeDevelopmentClapperBridgeprimitiveMaterial：1.Treetrunk2.StoneHistoryofBridgeDevelopmentRomanArchBridge100B.C.RomansArchdesignevenlydistributesstressesNa

2、turalconcretemadefrommudandstrawHistoryofBridgeDevelopmentZhaozhouBridge安济桥600A.D.CHINAChineseoldeststandingstonebridgeLowbridge,shallowarch,allowsboatsandwatertopassthroughHistoryofBridgeDevelopmentCoveredbridge(廊桥)17thEuropetimber-trussbridgeProtectwoodenstructuralHistoryofBridgeDevelopmentTowe

3、rBridgeLondonEnglandbuilt1886–1894combinedbasculeandsuspensiontwobridgetowersHistoryofBridgeDevelopmentBrooklynBridgeCompletedin1883NewYorkCityofUSAhybridcable-stayed/suspensionbridgeUseofsteelinsuspendingcablesHistoryofBridgeDevelopmentAkashiKaikyōBridge1988-1998thelongestcentralspanintheworld(1

4、991m)TypesofBridgesBeambridgeArchBridgeMoveablebridgeCable-StayedBridgeSuspensionBridgeBeambridgeabridgethatutilizesgirdersasthemeansofsupportingthedeckthemostcommonlybuiltandutilizedbridgethemostsimplifiedformNomomentsaretransferredthroughoutthesupportArchBridgeOneormorearchesMasonry,reinforcedc

5、oncreteorsteeldeckarchbridge(上承式拱桥)througharchbridge(下承式拱桥)SpanscanbelongerthanbeamortrussArchBridgeWorkflowontheRomanBridge:thefalsework(脚手架)wasmovedtoanotheropeningassoonasthelowerarchribhadbeencompletedMoveablebridgeBeamismoveableAdvantage：lowercostDisadvantage：trafficmustbehaltedwhenitisopene

6、dMoveablebridgeAllkindsofmoveablebridgesCable-StayedBridgeoneormoretowerscablessupportthebridgedecktwomajorclassesofcable-stayedbridges:harpandfan.optimalforspanslongerthancantileverbridges,andshorterthansuspensionbridges.Cable-StayedBridgeTheRusskyBridge,theworld'slongestcable-stayedbridgeThebri

7、dgewascompletedinJuly2012,Russiawitha1104mlongcentralspanCable-StayedBridgeOctávioFriasdeOliveira(圣保罗奥利韦尔)BridgeSãoPaulo,Brazil,openedinMay2008twocurvedtrackssupportedbyasingleconcretemastSuspensionBridgespan600to1200m