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1、基底隔震桥墩振动台试验研究AbstractBycombiningthefiniteelementnumericalsimulationmethodwithshakingtablemodeltest,thispaperstudiesontheseismicresponseofthreekindsofbaseswingisolationpier.Bycomparingtheresultsofshakingtabletestandfiniteelementnumericalsimulationresults,summarizingthe
2、seismicresponsevariationofthreekindsofbaseisolationpierandverifyingthecorrectnessofthenumericalcalculationmodelhavethepositivepracticalsignificancetothepromotionofthebaseisolationtechniqueinbridgeseismicapplication.Themainresearchcontentsofthispaperareasfollows:(1)The
3、researchstatusofthebaseisolationtechnologyathomeandabroadwasintroducedfromthetheoreticalstudy,theshakingtabletestandpracticalapplicationthreeaspects,andthedesignandcalculationmethodofthebaseisolationpierwasexpounded,andthemechanicalpropertiesoftypicalseismicisolationd
4、eviceandcommonlyseismicisolationanalysismethodusedbybridgewassumedup.(2)Basedonthedynamicmodeltestofstructuresimilarityprinciple,takingthemixed24msimplysupportedTbeambridgerectangularpierofdesignspeedof160km/hastheprototype,threegroupsofBasalswingisolationpiermodelfor
5、similarratio1:40aredesigned,whichrepresentlibertyrockingbaseisolationpier,baseisolationpierofreinforcementandupliftalongthebothsidesofpierbottom,baseisolationpierofthecenterisprovidedwiththeprestressedantirollbar.(3)Throughthemodeloftheshakingtabletestresearch,threemo
6、delarestudiedtheacceleration,displacementandstressresponseofdifferentpeakgroundacceleration,differenttypesofseismicwavesanddifferentaxialcompressionratio,andthedatawerecomparedandanalyzed.(4)Throughcontrastandanalysisthreekindsofmodelseismicresponse,theinfluencedofsei
7、smicpeakacceleration,thetypeofseismicwaveandtheaxialcompressionratiotothreekindsofbaseisolationpierseismicresponseareresearched.ThroughcomparingSeismicresponseofmodel,theinfluencedoflimitingenergydissipationdevicestomodelbridgepierswingreactionmechanismandenergydissip
8、ationisresearched.Basedonthesummaryofthevariationofbaseisolationpierseismicresponse,theadvantagesanddisadvantagesofthreekind
