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基于车-桥耦合振动理论的连续梁桥影响因素分析.docx

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基于车-桥耦合振动理论的连续梁桥影响因素分析 Abstract Asacrucialcomponentoftransportationinfrastructure,continuousbeambridgesarepronetosufferingfromvariousenvironmentalandtrafficloads.Therefore,itisnecessarytoinvestigatetheinfluencingfactorsofcontinuousbeambridgesbasedonthevehicle-bridgecouplingvibrationtheory.Inthispaper,thetheoreticalframeworkofvehicle-bridgecouplingvibrationisintroduced.Furthermore,thekeyinfluencingfactors,includingvehiclespeed,bridgespanlength,andpavementcondition,arereviewedin-depth.Throughthedetailedanalysisofthesefactors,thepotentialproblemsandchallengesofcontinuousbeambridgesarerevealed,providinginsightsfortheoptimizationandimprovementofbridgedesignandmaintenance. Introduction Continuousbeambridgesarewidelyusedinmoderntransportationinfrastructureduetotheirnumerousadvantages,suchasstabilityandeconomy.However,thestructuralperformanceofcontinuousbeambridgescanbesignificantlyaffectedbyvariousenvironmentalandtrafficloads,suchaswind,temperature,dynamicvehicleloads,andpavementconditions.Thedynamicvehicleloadisoneofthemostcriticalfactorsthatcreatevibrationsonthebridgedeckandcausedamagetothebridgestructure.Themovementsofvehiclesoverthecontinuousbeambridgeinducedifferentvibrationmodesonthebridge,whichaffectsthenaturalfrequencyanddampingofthebridgestructure.Therefore,itbecomescrucialtostudytheimpactofvariousinfluencingfactorsonthedynamicresponseofcontinuousbeambridges. Thispaperaimstoprovideananalysisoftheinfluencingfactorsoncontinuousbeambridgesbasedonvehicle-bridgecouplingvibrationtheory.Firstly,thetheoreticalframeworkandprinciplesofvehicle-bridgecouplingvibrationareintroduced.Then,thekeyinfluencingfactorsaffectingthedynamicresponseanddamageofcontinuousbeambridgesarediscussedindetail.Byanalyzingthesefactors,thepotentialproblemsandchallengesofcontinuousbeambridgescanbeidentifiedandaddressed,leadingtobetterbridgedesignandmaintenancestrategies. Vehicle-BridgeCouplingVibrationTheory Thevibrationofabridgeiscausedbyboththebridge'sowncharacteristics,suchasnaturalfrequencyanddamp