大跨度公铁两用斜拉桥地震反应谱分析

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1、武汉理工大学硕士学位论文大跨度公铁两用斜拉桥地震反应谱分析姓名：王孝军申请学位级别：硕士专业：结构工程指导教师：瞿伟廉20060501武汉理工大学硕士学位论文ABSTRACTItiswellknow,ingeneral．thatthelong—spanbridgeisthehingeoftransportationsystemandtheimportantcomponentoflifelineproject．Intheearthquake，thedamageofthebridgeprojectwillleadtothetrafficdisruption，whichmakesthedisa

2、ster-reliefworkdifficultorsubstantiallydelayedandthesecondarydisastersenhancedmoregreatly,andresultinhugeeconomiclosses．Atthesametime，becauseofthecharacteristicsofthebeautifulappearance，lowcostandgoodmechanicsperformanceofthecable—stayedbridge，itislikedbytheeng"neePsmoreandmoreanddevelopsrapidlyw

3、iththedevelopmentofthenationaleconomy．Withthegrowingsizeofthecable-stayedbridge，theseismicresponseofthecable·stayedbridgebecomesmoreandmoreimportantandsometimesplaysadecisiverole．Therefore，theseismicresponseanalysisofthelargespancable-stayedbridgeisnecessary．TianxinzhouBridgeinWuHancityisahighway

4、-railwaycable-stayedbridgewithtwintowersandthreecableplaneandthemainspanof504mandthefull—lengthof1092m．Becauseofitscomplexstructure，uniquestructuresystemandimportantgeographicallocation，theseismicresponseanalysisisveryimportantandsignificant．Onthebasisofthestudyachievementsathomeandabroad，thepape

5、rsetTianxinzhouBridgeastheprojectbackgroundandtheANSYSstructuralanalysisproceduresandthespectralanalysistheoryarebothusedtocalculatetheseismicresponseandtheseismicresponselawsofthebridgeareobtained．Firstly,afterintroducingthespectralanalysistheoryofthelargespanbridgestructure，thedynamiccalculatio

6、nmodelofTianxinzhouBridgeisdevelopedwithANSYSandthedynamicpropertiesareobtainedthroughmodalanalysis．ThedampingratiooftheoverallstructureofTianxinzhouBridgeisunknown，becausethestructureofthebridgeiscomposedbyreinforcedconcretestructureandsteelworkstructure．Forthepurposeofconsideringtheeffectofdamp

7、ingratiotothespectrumvalueandpredictingaccuratelytheseismicresponse，beforetheseismicresponseanalysis，thepapergainedtheequivalentdampingratiooftheoverall1I武汉理工大学硕士学位论文structureof’nan】【iIlzhBridgewithinrealnumberbytheuse