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《采用不同隔震方案的隔震連續(xù)梁橋地震響應(yīng)分析》由會(huì)員上傳分享，免費(fèi)在線(xiàn)閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、ABSTRACTThisdissertationtakesacontinuousbridgeusingisolationbearingsasapracticalexample.Seismicresponseanalysesofisolatedbridgesusingdifferentseismicisolationschemesareconducted.Theresearchisproposedforengineeringdesignguidance.Themainworkisasfollows:(1)Ordinarysphericalsteelbearings,potrubberbea
2、rings,leadcorerubberbearingsandnonlineardampingspokeshockisolationsupportsareanalyzed.Thedissertationincludesthestructureforms,workingprinciplesandmechanicalmodelofthebearings.Theequivalentlinearizationanalyticalmodelofnonlineardampingspokeshockisolationsupportsisproposed.(2)Finiteelementmodelsof
3、isolatedcontinuousbridgesareestablished.Seismicresponseanalysesofthebridgesareconductedusingdynamictimehistoryanalysismethod.Theresearchincludestheresponsesofshearforceandbendingmomentatthepierfoot,beamdisplacementanddisplacementofpiertop.Theresultsshowthatthenaturalvibrationperiodsofthebridgeare
4、effectivelyenlarged.Meanwhile,thedisplacementsofbridgesareenlarged.Internalforcesofthebridgearereduced.Theisolationbearingscaneffectivelyreducetheductilitydemandofbridgepiersandalleviateseismicactionofbridgestructures.(3)Pilefoundationisusedinthebridgeengineering.Soilmediumhasimpactonseismicrespo
5、nsesofthebridgestructurethroughthepilefoundation.Thesoil-structureinteraction(SSI)hasbeenconsideredaccordingtoChinesecodes.SeismicresponseanalysesofthebridgewithSSIarecarriedon.Theresultshowsthatsoil-structureinteractionreducesseismicresponsesofbridgestructureswithalongernaturalvibrationperiod.Th
6、eefficiencyofbridgedesigncouldbeimprovedwhiletakingSSIintoconsideration.KEYWORDS：isolatedbridge;isolationbearing;seismicresponse;nonlineardampingspokesupport;soil-structureinteraction目錄第一章緒論...........................................................................................................
7、.......11.1課題背景與意義..............................................................................................11.1.1工程概況................................................................................................
