外文翻译减震器对底部隔震结构抗震反应的作用

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1、北京交通大学毕业设计（论文）外文翻译Influenceofisolatorcharacteristicsontheresponseofbase-isolatedstructureVasantA.Matsaar1Z.S.JanidsAbstractTheinfluenceofisolatorcharacteristicsontheseismicresponseofmulti-storybase-isolatedstructureisinvestigated.Theisolatedbuildingismodeledasasheartypestru

2、cturewithlateraldegree-of-freedomateachfloor.Theisolatorsaremodeledbyusingtwodifferentmathematicalmodelsdepictedbybi-linearhystereticandequivalentlinearelastic-viscousbehaviors.Thecoupleddifferentialequationsofmotionfortheisolatedsystemarederivedandsolvedintheincrementalfor

3、musingNewmark'sstep-by-stepmethodofintegration.Thevariationoftopfloorabsoluteaccelerationandhearingdisplacementforvariousbi-linearsystemsunderdifferentearthquakesiscomputedtostudytheeffectsoftheshapeoftheisolatorhysteresisloop.Theinfluenceoftheshapeofisolatorforce-deformati

4、onloopontheresponseofisolatedstructureisstudiedunderthevariationofimportantsystemparameterssuchasisolatoryielddisplacement,superstructureflexibility,isolationtimeperiodandnumberofstoryofthebase-isolatedstructure.Itisobservedthatthecodespecifiedequivalentlinearelasticviscous

5、dampingmodelofabi-linearhystereticsystemoverestimatesthedesignbearingdisplacementandunderestimatesthesuperstructureacceleration.Theresponseofbase-isolatedstructureissignificantlyinfluencedbytheshapeofhysteresisloopofisolator.Thelowvalueofyielddisplace-mentofisolator(i.e.sli

6、dingtypeisolationsystems)tendstoincreasethesuperstructureaccelerationsassociatedwithhighfrequencies.Further,thesuperstructureaccelerationalsoincreaseswiththeincreaseofthesuperstructureflexibility.keywords:Baseisolation;Earthquake;ElastomtricbearingSlidingsystem;Bearingdispl

7、acement;Superstructureacceleration;Bi-linearhysteresis;Equivalentlinear.1IntroductionSeismicisolation,whichisnowrecognizedasamatureandefficient第32页北京交通大学毕业设计（论文）外文翻译technology,canbeadoptedtoimprovetheseismicperformanceofstrategicallyimportantbuildingssuchasschools,hospitals

8、,industrialstructuresetc.,inadditiontotheplaceswheresensitiveequipmentsareintended