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1、附Ⅰ外文翻译原文ImprovementofConcreteShearWallStructuresbySmartMaterialsMehdiGhassemieh1*,MohammadRezaBahaari1,SeyedMohyeddinGhodratian1,SeyedAliNojoumi21SchoolofCivilEngineering,UniversityofTehran,Tehran,Iran2Civil&EnvironmentalEngineeringDepartment,UniversityofCalifornia,LosAngeles,U
2、SAEmail:*mghassem@ut.ac.irReceivedMay7,2012;revisedJune10,2012;acceptedJune20,2012ABSTRACTSmartmaterialshavefoundnumerousapplicationsinmanyareasincivilengineeringrecently.Oneclassofthesemate-rialsisshapememoryalloy(SMA)whichexhibitsseveraluniquecharacteristicssuchassuperelastic
3、ityandshapememoryeffect.Duetothesecharacteristics,researcheffortshavebeenextendedtouseSMAincontrollingcivilstruc-tures.ThispaperinvestigatestheeffectivenessofSMAreinforcementsinenhancingthebehaviorofshearwalls,espe-ciallywhensubjectedtoseismicexcitations.Twoordinaryandcoupledsh
4、earwallswereintroducedasreferencestruc-turesandweremodeledbyABAQUSsoftware.Forimprovingtheseismicresponseoftheshearwalls,verticalSMAreinforcingbarswereproposedtobeimplementedlikeconventionalsteelreinforcements,throughouttheheightofthestructuresandineveryconnectingbeaminthecoupl
5、edshearwallsystem.TheonedimensionalsuperelasticmodelofSMAmaterialwasimplementedinthecomputersoftwareusingFORTRANcode.ThedynamicresponseoftheshearwallssubjectedtoseismicloadingwasinvestigatedthroughtimehistoryanalysesunderEl-centroandKoynarecords.Theresultsshowedthatusingsuperel
6、asticSMAmaterialinsteadofsteelbarscausedremarkablereductioninresidualdisplacementforbothordinaryandcoupledshearwalls.Inaddition,SMAreinforcementscouldsignificantlydecreasethemaximumdeflectionofthecoupledshearwallsystem.Keywords:SmartMaterial;ShapeMemoryAlloy;ShearWall;Superelas
7、ticity;SeismicBehaviorIntroductionManymulti-storeybuildingscontainshearwallsaroundtheelevatorshaftsandstairwellsaslateralresistingsys-tems.Fortheconcreteshearwallsystems,itisdifficulttosatisfytheveryductilebehaviorconditions.Therefore,suchstructureshaveoftensuffereddamagescause
8、dbyearthquakeevents.Shearingdamage,bendingdamage,slidi
