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隔震结构等效线性模型的反应谱法研究 Title:Seismicresponseanalysisusingtheequivalentlinearmodelforbase-isolatedstructures Abstract: Theseismicresponseofbuildingsandstructuresisofparamountimportanceinensuringtheirsafetyandresilienceduringearthquakes.Baseisolationisaneffectivetechniqueusedinstructuralengineeringtoreducethetransmissionofseismicforcestoabuilding,thusminimizingpotentialdamage.Thisstudyinvestigatestheresponsecharacteristicsofbase-isolatedstructuresusingtheequivalentlinearmodelcombinedwiththeresponsespectrummethod.Theaimistoanalyzetheeffectivenessofbaseisolationinimprovingtheseismicperformanceofstructuresandthepotentiallimitationsoftheequivalentlinearmodel. Introduction: Baseisolationhasgainedsignificantattentionasastrategytomitigatethedestructiveeffectsofearthquakesonstructures.Theuseofbaseisolatorsallowsthebuildingtomoveindependentlyfromtheground,diminishingthetransferofseismicforcesandreducingstructuraldamage.Theresponsespectrummethod,awidelyacceptedapproachforseismicanalysis,canbeappliedtobase-isolatedstructuresusinganequivalentlinearmodel.Thispaperaimstodiscusstheprinciplesoftheequivalentlinearmodelandexaminetheseismicresponseofbase-isolatedstructuresusingthismethod. Methodology: Theequivalentlinearmodelapproximatesthenonlinearbehaviorofthebaseisolatorstoalinearsystemwhilepreservingtheessentialcharacteristicsoftheresponse.Themodelconsidersboththehorizontalandverticalmovementsofthestructureandtakesintoaccounttheenergydissipationandstiffnessoftheisolators.Theresponsespectrumanalysisisthenemployedtodeterminethedynamicresponseofthestructureundervariousearthquakeintensities. ResultsandDiscussion: Theresponsespectraobtainedfromtheequivalentlinearanalysisenabletheevaluationoftheresponseofbase-isolatedstructuresunderdifferentgroundmotions.Bycomparingtheresponsespectraofthebase-isolatedstructurewiththoseofthefixed-basestructure,theadvantagesofbaseisolationcanbeobserved.Thereductioninmaximumacceleration,displacement,andinter-storydriftindicatestheeffectivenessofbaseisolationinpro