外文翻译--减震器对底部隔震结构抗震反应的作用.doc外文翻译--减震器对底部隔震结构抗震反应的作用.doc

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北京交通大学毕业设计(论文)外文翻译第1页INFLUENCEOFISOLATORCHARACTERISTICSONTHERESPONSEOFBASEISOLATEDSTRUCTUREVASANTAMATSAAR1ZSJANIDSABSTRACTTHEINFLUENCEOFISOLATORCHARACTERISTICSONTHESEISMICRESPONSEOFMULTISTORYBASEISOLATEDSTRUCTUREISINVESTIGATEDTHEISOLATEDBUILDINGISMODELEDASASHEARTYPESTRUCTUREWITHLATERALDEGREEOFFREEDOMATEACHFLOORTHEISOLATORSAREMODELEDBYUSINGTWODIFFERENTMATHEMATICALMODELSDEPICTEDBYBILINEARHYSTERETICANDEQUIVALENTLINEARELASTICVISCOUSBEHAVIORSTHECOUPLEDDIFFERENTIALEQUATIONSOFMOTIONFORTHEISOLATEDSYSTEMAREDERIVEDANDSOLVEDINTHEINCREMENTALFORMUSINGNEWMARKSSTEPBYSTEPMETHODOFINTEGRATIONTHEVARIATIONOFTOPFLOORABSOLUTEACCELERATIONANDHEARINGDISPLACEMENTFORVARIOUSBILINEARSYSTEMSUNDERDIFFERENTEARTHQUAKESISCOMPUTEDTOSTUDYTHEEFFECTSOFTHESHAPEOFTHEISOLATORHYSTERESISLOOPTHEINFLUENCEOFTHESHAPEOFISOLATORFORCEDEFORMATIONLOOPONTHERESPONSEOFISOLATEDSTRUCTUREISSTUDIEDUNDERTHEVARIATIONOFIMPORTANTSYSTEMPARAMETERSSUCHASISOLATORYIELDDISPLACEMENT,SUPERSTRUCTUREFLEXIBILITY,ISOLATIONTIMEPERIODANDNUMBEROFSTORYOFTHEBASEISOLATEDSTRUCTUREITISOBSERVEDTHATTHECODESPECIFIEDEQUIVALENTLINEARELASTICVISCOUSDAMPINGMODELOFABILINEARHYSTERETICSYSTEMOVERESTIMATESTHEDESIGNBEARINGDISPLACEMENTANDUNDERESTIMATESTHESUPERSTRUCTUREACCELERATIONTHERESPONSEOFBASEISOLATEDSTRUCTUREISSIGNIFICANTLYINFLUENCEDBYTHESHAPEOFHYSTERESISLOOPOFISOLATORTHELOWVALUEOFYIELDDISPLACEMENTOFISOLATORIESLIDINGTYPEISOLATIONSYSTEMSTENDSTOINCREASETHESUPERSTRUCTUREACCELERATIONSASSOCIATEDWITHHIGHFREQUENCIESFURTHER,THESUPERSTRUCTUREACCELERATIONALSOINCREASESWITHTHEINCREASEOFTHESUPERSTRUCTUREFLEXIBILITYKEYWORDSBASEISOLATION;EARTHQUAKE;ELASTOMTRICBEARINGSLIDINGSYSTEM;BEARINGDISPLACEMENT;SUPERSTRUCTUREACCELERATION;BILINEARHYSTERESIS;EQUIVALENTLINEAR1INTRODUCTIONSEISMICISOLATION,WHICHISNOWRECOGNIZEDASAMATUREANDEFFICIENT北京交通大学毕业设计(论文)外文翻译第2页TECHNOLOGY,CANBEADOPTEDTOIMPROVETHESEISMICPERFORMANCEOFSTRATEGICALLYIMPORTANTBUILDINGSSUCHASSCHOOLS,HOSPITALS,INDUSTRIALSTRUCTURESETC,INADDITIONTOTHEPLACESWHERESENSITIVEEQUIPMENTSAREINTENDEDTOPROTECTFROMHAZARDOUSEFFECTSDURINGEARTHQUAKE13BASEDONTHEEXTENTOFCONTROLTOBEACHIEVEDOVERTHESEISMICRESPONSE,THECHOICEOFTHEISOLATIONSYSTEMVARIESANDTHEREUPONITSDESIGNISDONETOSUITTHEREQUIREMENTSOFUSEOFTHESTRUCTUREINSEISMICALLYBASEISOLATEDSYSTEMS,THESUPERSTRUCTUREISDECOUPLEDFROMTHEEARTHQUAKEGROUNDMOTIONBYINTRODUCINGAFLEXIBLEINTERFACEBETWEENTHEFOUNDATIONANDTHEBASEOFSTRUCTURETHEREBY,THEISOLATIONSYSTEMSHIFTSTHEFUNDAMENTALTIMEPERIODOFTHESTRUCTURETOALARGEVALUEAND/ORDISSIPATESTHEENERGYINDAMPING,LIMITINGTHEAMOUNTOFFORCETHATCANBETRANSFERREDTOTHESUPERSTRUCTURESUCHTHATINTERSTORYDRIFTANDFLOORACCELERATIONSAREREDUCEDDRASTICALLYTHEMATCHINGOFFUNDAMENTALFREQUENCIESOFBASEISOLATEDSTRUCTURESANDTHEPREDOMINANTFREQUENCYCONTENTSOFEARTHQUAKESISALSOCONSEQUENTLYAVOIDED,LEADINGTOAFLEXIBLESTRUCTURALSYSTEMMORESUITABLEFROMEARTHQUAKERESISTANCEVIEWPOINTTHETWOMOSTCOMMONTYPESOFBASEISOLATIONSYSTEMSADOPTEDINPRACTICEUTILIZEEITHERRUBBERBEARINGSORSLIDINGSYSTEMSBETWEENTHEFOUNDATIONANDSUPERSTRUCTUREFORTHEPURPOSEOFISOLATIONFROMGROUNDMOTIONSINTHEBUILDINGSASWELLASBRIDGESITISVERYESSENTIALTOUNDERSTANDTHEDIFFERENTPARAMETERSAFFECTINGTHERESPONSEOFBASEISOLATEDSTRUCTUREWHENUSEDFORSEISMICPROTECTIONOFTHESTRUCTURESESPECIALLYINCASEOFTHEBASEISOLATEDSTRUCTURES,THATHOUSESSENSITIVEEQUIPMENTS,DETERMINATIONOFACCELERATIONIMPARTEDANDASSOCIATEDPEAKDISPLACEMENTARETHEKEYISSUESFORTHEDESIGNENGINEER4MOREOVER,THEPOUNDINGANDSTRUCTURALIMPACTSINCASEOFBASEISOLATEDSTRUCTURESMADEUPONTHEADJACENTSTRUCTURES,WHENSEPARATIONGAPDISTANCESAREINADEQUATE,BECOMEAMAJORCONCERNBECAUSETHESEPHENOMENAMAYLEADTOCATASTROPHICFAILURESLEADINGTOIMMENSEISOLATORDAMAGESUCHFAILURESANDDAMAGESCANBEAVOIDEDBYPROPERLYESTIMATINGTHEPEAKISOLATORDISPLACEMENTANDRECOMMENDATIONOFAPPROPRIATEISOLATIONGAPDISTANCESINORDERTOPREDICTPEAKDISPLACEMENTANDDETERMINEACCURATESEPARATIONGAPDISTANCEREQUIREMENTFORABASEISOLATEDSTRUCTURE,ITISMANDATORYTOKNOW,INPRIOR,THEDIFFERENTPARAMETERSTHATAFFECTTHEBEARINGDISPLACEMENTANDITSCONSEQUENTEFFECTONTHESUPERSTRUCTUREACCELERATIONTHEFAILURESDUETOSUCHIMPACTSCANBEAVOIDEDBYREDUCINGTHEPEAKBEARINGDISPLACEMENTBYCOMPROMISINGWITHINCREASEIN北京交通大学毕业设计(论文)外文翻译第3页SUPERSTRUCTUREACCELERATIONTOANACCEPTABLELEVELIETOLERABLEREDUCTIONINEFFECTIVENESSOFISOLATIONSELECTIONOFDIFFERENTPARAMETERSCHARACTERIZINGANISOLATIONSYSTEMISIMPORTANTINVIEWOFKEEPINGACONTROLOVERRESPONSEQUANTITIESESPECIALLYTHEEXCESSIVEBEARINGDISPLACEMENTATISOLATORLEVELTHEBEHAVIOROFISOLATIONSYSTEMSANDTHEBASEISOLATEDSTRUCTURESISNOWWELLESTABLISHEDANDCODESAREDEVELOPEDFORDESIGNINGTHEBASEISOLATEDSTRUCTURES5–9FORNONLINEARISOLATIONSYSTEMS,THECODESALLOWTOUSETHEEQUIVALENTLINEARMODELTOPERMITTHEUSEOFRESPONSESPECTRUMMETHODFORDESIGNINGTHEISOLATEDSTRUCTURESTHEEQUIVALENTLINEARMODELSAREBASEDONTHEEFFECTIVESTIFFNESSATTHEDESIGNDISPLACEMENTANDTHEEQUIVALENTVISCOUSDAMPINGISEVALUATEDFROMTHEAREAOFTHEHYSTERESISLOOPTHECOMPARISONOFEQUIVALENTLINEARANDACTUALNONLINEARMODELFORTHERESPONSEOFISOLATEDBRIDGESTRUCTURESHADBEENDEMONSTRATEDINTHEPAST10–13ANDSHOWNTHATTHEEQUIVALENTLINEARMODELCANBEUSEDFORPREDICTINGTHEACTUALNONLINEARRESPONSEOFTHESYSTEMHOWEVER,THEABOVESTUDIESWEREREST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编号:201311171116205789    类型:共享资源    大小:570.00KB    格式:DOC    上传时间:2013-11-17
  
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