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1、專業(yè)英文文獻原文及翻譯ImprovementImprovementofofConcreteConcreteShearShearWallWallStructuresStructuresbybySmartSmartMaterialsMaterialsMehdiMehdiGhassemieh1Ghassemieh1MohammadMohammadRezaRezaBahaari1Bahaari1SeyedSeyedMohyeddinMohyed
2、dinGhodratian1Ghodratian1SeyedSeyedAliAliNojoumi2Nojoumi21SchoolofCivilEngineeringUniversityofTehranTehranIran2CivilrevisedJune102012acceptedJune202012AbstractAbstractSmartmaterialshavefoundnumerousapplicationsinmanyarea
3、sincivilengineeringrecently.Oneclassofthesematerialsisshapememyalloy(SMA)whichexhibitsseveraluniqueacteristicssuchassuperelasticityshapememyeffect.DuetotheseacteristicsresearchefftshavebeenextendedtouseSMAincontrollingci
4、vilstructures.ThispaperinvestigatestheeffectivenessofSMAreinfcementsinenhancingthebehaviofshearwallsespeciallywhensubjectedtoseismicexcitations.TwodinarycoupledshearwallswereintroducedasreferencestructuresweremodeledbyAB
5、AQUSsoftware.FimprovingtheseismicresponseoftheshearwallsverticalSMAreinfcingbarswereproposedtobeimplementedlikeconventionalsteelreinfcementsthroughouttheheightofthestructuresineveryconnectingbeaminthecoupledshearwallsyst
6、em.TheonedimensionalsuperelasticmodelofSMAmaterialwasimplementedinthecomputersoftwareusingFTRANcode.ThedynamicresponseoftheshearwallssubjectedtoseismicloadingwasinvestigatedthroughtimehistyanalysesunderElcentroKoynarecds
7、.TheresultsshowedthatusingsuperelasticSMAmaterialinsteadofsteelbarscausedremarkablereductioninresidualdisplacementfbothdinarybasedonpseudoelasticSMAs[7].DesRochesetal.experimentallyevaluatedthepropertiesofsuperelasticNiT
8、ishapememyalloysundercyclicloadingtoassesstheirpotentialfapplicationsinseismicresistantdesignretrofit[8].Abolmaalietal.comparedtheenergydissipativeacteristicsofboltedtstubconnectionsusingsteelshapememyalloy(SMA)fasteners
9、[9].Choietal.proposedanewSMArubberbearingwhichiscomposedofaconventionalelastomericbearingSMAwireswrappingthebearinginlongitudinaldirection[10].AmultilinearconstitutivemodeldevelopedbyMotahariGhassemiehwasadoptedtocapture
10、themostcommonbehavisofSMA[11].Czaderskietal.testedareinfcedconcrete(RC)beamequippedwithSMAmaterialcompareditwithconventionalRCbeam[12].TheresultsprovedthatbyusingshapememyalloysitispossibletoproduceaRCbeamwhichhasvariabl
11、estiffnessstrength.SaiidiWangpresentedtheapplicationofSMAbarsinsteadofsteelbarsinplastichingezoneofreinfcedconcretebridgepiers[13].Motaharietal.alsointroducedaspecialSMAdampertohavebothrecenteringenergydissipatingacteris
12、ticssimultaneously[14].Lietal.experimentallystudiedthebehaviofsmartconcretebeamswithembeddedshapememyalloybundles[15].TheyusedSMAbundlesasactuatstoachieverecoveryfce.rawesDesRochescomparedtheefficiencyofSMArestrainerswit
13、hthreeotherretrofitdevicesincludingconventionalsteelrestrainersmetallicdampersviscoelasticdampers[16].Johnsonetal.conductedalargescaletestingprogramtoevaluatetheeffectofSMArestrainercableontheseismicperfmanceofinspanhing
14、esofmultipleframeconcreteboxgirderbridgesubjectedtostronggroundmotion[17].Rahmanetal.investigatedtheeffectofcrosssectiongeometryonthebendingofabeamalsobucklingofacolumnmadeofSMAthroughanumericalstudy[18].Sharabashrawesst
15、udiedtheapplicationofSMAsasseismicpassivedamperdevicesfvibrationmitigationofcablestayedbridges[19].Thefeasibilityofsuperelasticityinincreasingductilitycapacitydecreasingresidualdisplacementofconcretebridgecolumnwasinvest
16、igatedbySaiidietal.[20].OzbulutHurlebausexpledtheeffectivenessofSMArubberbasedisolationsystemsfseismicprotectionofbridgesagainstnearfieldearthquakes.TheyalsocomparetheperfmanceofSMArubberbasedisolationsystemswithSMAbased
17、slidingisolationsystem[21].Karietal.evaluatedtheeffectivenessofanewdualbracingsystemfimprovingtheseismicbehaviofsteelstructures[22].InthisstudythebehaviofconcreteshearwallsreinfcedwithSMAbarsisinvestigated.Finiteelementp
18、rogramABAQUSwasusedindertoassesstheresponseofthestructuressubjectedtoseismicloading.TwodinarycoupledshearwallswereintroducedasreferencestructurestheirseismicbehaviwithwithoutSMAreinfcementwasevaluatedthroughtimehistyanal
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