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1、附Ⅰ外文翻译原文ImprovementofConcreteShearWallStructuresbySmartMaterialsMehdiGhassemieh1*,MohammadRezaBahaari1,SeyedMohyeddinGhodratian1,SeyedAliNojoumi21SchoolofCivilEngineering,UniversityofTehran,Tehran,Iran2Civil&EnvironmentalEngineeringDepartment,UniversityofCalifornia,
2、LosAngeles,USAEmail:*mghassem@ut.ac.irReceivedMay7,2012;revisedJune10,2012;acceptedJune20,2012ABSTRACTSmartmaterialshavefoundnumerousapplicationsinmanyareasincivilengineeringrecently.Oneclassofthesemate-rialsisshapememoryalloy(SMA)whichexhibitsseveraluniquecharacter
3、isticssuchassuperelasticityandshapememoryeffect.Duetothesecharacteristics,researcheffortshavebeenextendedtouseSMAincontrollingcivilstruc-tures.ThispaperinvestigatestheeffectivenessofSMAreinforcementsinenhancingthebehaviorofshearwalls,espe-ciallywhensubjectedtoseismi
4、cexcitations.Twoordinaryandcoupledshearwallswereintroducedasreferencestruc-turesandweremodeledbyABAQUSsoftware.Forimprovingtheseismicresponseoftheshearwalls,verticalSMAreinforcingbarswereproposedtobeimplementedlikeconventionalsteelreinforcements,throughouttheheighto
5、fthestructuresandineveryconnectingbeaminthecoupledshearwallsystem.TheonedimensionalsuperelasticmodelofSMAmaterialwasimplementedinthecomputersoftwareusingFORTRANcode.Thedynamicresponseoftheshearwallssubjectedtoseismicloadingwasinvestigatedthroughtimehistoryanalysesun
6、derEl-centroandKoynarecords.TheresultsshowedthatusingsuperelasticSMAmaterialinsteadofsteelbarscausedremarkablereductioninresidualdisplacementforbothordinaryandcoupledshearwalls.Inaddition,SMAreinforcementscouldsignificantlydecreasethemaximumdeflectionofthecoupledshe
7、arwallsystem.Keywords:SmartMaterial;ShapeMemoryAlloy;ShearWall;Superelasticity;SeismicBehaviorIntroductionManymulti-storeybuildingscontainshearwallsaroundtheelevatorshaftsandstairwellsaslateralresistingsys-tems.Fortheconcreteshearwallsystems,itisdifficulttosatisfyth
8、everyductilebehaviorconditions.Therefore,suchstructureshaveoftensuffereddamagescausedbyearthquakeevents.Shearingdamage,bendingdamage,slidi
