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1、TestofaCoupledWallwithHighPerformanceFiberReinforcedConcreteCouplingBeamsbyRémyLequesne,GustavoParra-Montesinos,andJamesK.WightSynopsis:Resultsfromthetestofalarge-scalecoupled-wallspecimenconsistingoftwoT-shapedreinforcedconcretestructuralwallsjoinedatfourlevelsbyp
2、recastcouplingbeamsarepresented.Eachcouplingbeamhadaspanlength-to-depthratio()of1.7,andwasdesignedtocarryashearstressof.Onereinforcedconcretecouplingbeamwasincludedalongwiththreestrain-hardening,High-PerformanceFiberReinforcedConcrete(HPFRC)couplingbeamstoallowacom
3、parisonoftheirbehavior.Whensubjectedtoreversinglateraldisplacements,thesystembehavedinahighlyductilemannercharacterizedbyexcellentstrengthretentiontodriftsof3%withoutappreciablepinchingofthelateralloadvs.drifthysteresisloops.Thereinforcedconcretestructuralwallsshow
4、edanexcellentdamagetoleranceinresponsetopeakaveragebaseshearstressesof.Thispaperpresentstheobserveddamagepatternsinthecouplingbeamsandthestructuralwalls.Therestrainingeffectprovidedbythestructuralwallstodamage-inducedlengtheningofthecouplingbeamsisdiscussedandcompa
5、redtothatobservedincomponenttests.Finally,theendrotationsmeasuredinthecouplingbeamsrelativetothedriftofthecoupled-wallsystemarealsopresented.Keywords:couplingbeam,coupledwall,highperformancefiberreinforcedconcrete(HPFRC),precast,seismic,shearRémyLequesne,ACImember,
6、isaPhDstudentinCivilEngineeringattheUniversityofMichigan,AnnArbor.Hewasthe2007-2008ACIPankowFoundationFellowshiprecipient,andisanAssociateMemberofACICommittee374,Performance-BasedSeismicDesignofConcreteBuildings.Hisresearchinterestsincludethebehavioranddesignofrein
7、forcedconcretemembers,themechanicalandstructuralbehaviorofhigh-performancefiber-reinforcedconcrete,andtheearthquakeresistantdesignofreinforcedconcretestructures.GustavoJ.Parra-Montesinos,ACImember,isanAssociateProfessorofCivilEngineeringattheUniversityofMichigan,An
8、nArbor.HeisSecretaryofACICommittee335,CompositeandHybridStructures;andamemberofACICommittee318,StructuralBuildingCode,andJointACI-ASCECommittee35
