高速铁路大跨度矮塔斜拉桥动力试验与数值仿真研究

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¹，²， ，12（1.， 410075；2.轨道交通工程结构防灾减灾省重点实验室， 410075;3.中国铁道科学研究院集团有限公司铁道建筑研究所，）

关键词：高速铁路；矮塔斜拉桥；车-桥耦合振动；动力响应；动载试验 中图分类号：U448.13 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202403070

Dynamic experiment and numerical simulation of long span extradosed cable-stayed bridge for high-speed railway

ZHAO Yongshuai'，HE Xuhui1²，WANG Kai³， CAI Chenzhi1²

（1.ScholofCivilEngineering，CentralSouthUniversityChangsha41075，China；2.HunanProvincialKeyLaboratoryfoDisaster

PreventionandMitigationofRailransitEngineringStructures，Changsha41075，China；3.RailwayEngineeringResearchIstiute， China Academy of Railway Sciences Corporation Limited，Beijing 10oo81，China）

Abstract：Inoertvesiethouplinteaceigspeddetradodblestaddeaselladic performance of extradosed cable-stayed bridge，a （34+118+240+118+34） m long Yuanjiang extradosed cable-stayed bridge of the newly built Changyichangilyisoideredastgingbckgouddtatiohractersticsoftoupledseoftdte bridgeareinvestigaedusingfieldmeasurementsandnumericalsimulatios.Tedyamicexperimentisonductedtotsthedynaicsponse of tebridgettureispttaieftiodeleratoaicompeieilsioe throughthbridgeatdiferentspeeds.AoupledvbationmodelofthetraibidgeisstablsdMoreover，teelabilityofteupled vibrationmodelisonfiedbycomparingtemericalsimulationanddynaicexperimentresults.Ontisbasis，theectsofdiernt speedconditionsonthedynamicresponseofthetrain-bridgecouplingsystemandtheindicatorsoftrainruningsafetyandstabilityare investigated.Teresultssowtat：teumeicalsiulatioesultsofthedyamicresposeoftebridgearebasicallonsistentwithte measuredresults，andtheindexesofsafetyndstabilityoftanunderthedesignspeedmettespecificationimits.Themaximummeasured dynamicoefficientofdgestructureis116，andthebridgestructurehsgoodlateralandverticalstiessanddyamicroperties.

Keywords：highspeedrailway;extradosedbridge;vehicle-bridgecouplingvibration;dynamicresponse;dynamicoadexperiment

随着高铁快速发展，桥梁跨度不断增长，列车在桥上运行速度越来越高，车-桥耦合相互作用导致列车和桥梁动力效应日益突出。（剩余17508字）