预览加载中，请您耐心等待几秒...

公路曲线连续梁桥车桥耦合振动研究.docx

预览
1/3
2/3
3/3

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

公路曲线连续梁桥车桥耦合振动研究 I.Introduction Continuityofbridgesisanessentialpartofmodernhighwaydesign.Continuousbridgesprovideanumberofbenefitssuchasreducingthenumberofpiersneeded,improvingstructuralstability,andreducingjointmaintenancerequirements.However,continuousbridgesmayalsoleadtoagreaterlikelihoodofvehicle-bridgeinteractioneffects,includingthecouplingofthebridgeandthevehiclevibrations,asaresultoftheincreasedfrequencyandamplitudeofthevehicleloadsonthebridgedeck.Thevehicle-bridgeinteractioneffectscanaffectthesafety,comfort,anddurabilityofthebridgeandthevehiclesthatuseit. Thispaperpresentsastudyofthevehicle-bridgeinteractioneffectsoncontinuousbridgeswithcurvedalignments.Theresearchaimstoinvestigatethedynamicbehaviorofthebridgeundercoupledvehicleandbridgevibrationandtoidentifythecriticalparametersthataffecttheinteractioneffects.Thestudyisbasedonnumericalsimulationsthatuseafiniteelementmodelofacontinuouscurvedbridgeandamultibodyvehiclemodel.Theresultsofthesimulationsareusedtoidentifythebridgeandvehicleresponse,andtheeffectsofdifferentparameterssuchasbridgecurvature,vehiclespeed,andaxlespacingareanalyzed. II.LiteratureReview Thevehicle-bridgeinteractionphenomenonhasbeenextensivelystudiedinrecentyears,andmanyresearchershavefocusedonthedynamicresponseofcurvedbridgesastheinteractioneffectsmightbemoresignificantincurvedbridgesthaninstraightbridges.Severalresearchstudieshaveinvestigatedtheeffectofbridgecurvatureonvehicle-bridgeinteraction,andthefindingssuggestthatthebridgecurvatureplaysasignificantroleinthedynamicbehaviorofthebridge.Curvatureamplifiesthelateralandverticalforcescausedbythevehicleloadsandresultsinincreasedvibrationamplitudes. Differenttechniqueshavebeenusedtomodelthevehicle-bridgeinteraction,andfiniteelementmethod(FEM)hasbeenthemostcommonapproach.TheFEMmodelofabridgecanpredictthedynamicresponseofthebridgeundergivenloadingconditions.Meanwhile,themulti-bodydynamic(MBD)simulationhasbeenwidelyusedtomodelthevehicleresponseanditsinteractionwiththeroadsurface. III.Methodolo