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ID:42961110
大小:142.50 KB
页数:15页
时间:2019-09-24
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1、TestsonaHalf-ScaleTwo-StorySeismic-ResistingPrecastConcreteBuildingThispaperdescribesexperimentalstudiesontheseismicbehavioranddesignofprecastconcretebuildings.Ahalf-scaletwo-storyprecastconcretebuildingincorporatingadualsystemandrepresentingaparkingstructureinMexicoCitywas
2、investigated.Thestructurewastesteduptofailureinalaboratoryundersimulatedseismicloading.Insomeofthebeam-to-columnjoints,thebottomlongitudinalbarsofthebeamwerepurposelyundevelopedduetodimensionalconstraints.Emphasisisgiveninthestudyontheevaluationoftheobservedglobalbehaviorof
3、theteststructure.Thisbehaviorshowedthatthewallsoftheteststructurecontrolledtheforcepathmechanismandsignificantlyreducedthelateraldeformationdemandsintheprecastframes.Seismicdesigncriteriaandcodeimplicationsforprecastconcretestructuresresultingfromthisresearcharediscussed.Th
4、eendresultofthisresearchisthatabetterunderstandingofthestructuralbehaviorofthistypeofbuildinghasbeengainedresultsofsimulatedseismicloadtestsofatwostoryprecastconcretebuildingconstructedwithprecastconcreteelementsthatareusedinMexicoaredescribedherein.Thestructuralsystemchose
5、nintheteststructureisthesocalleddualtype,definedasthecombinationofstructuralwallsandbeam-to-columnframes.Connectionsbetweenprecastbeamsandcolumnsintheteststructureareofthe"window"type.Thistypeofconstructionistypicallyusedinlow-andmediumrisebuildingsinwhichcolumnsareconnecte
6、dwith"windows"ateachstorylevel.These"windows"containthetopandbottomreinforcement.Fig.1showsthistypeofconstructionforacommercialbuildinginMexicoCity.InmostprecastconcreteframessuchasthoseshowninFig,1,longitudinalbeambottombarsarenotfullydevelopedduetoconstraintsimposedbythed
7、imensionsoffilecolumnsinbeam-to-columnjoints.Inanefforttoovercomethisdeficiency,andasdescribedlater,somepracticingengineersinMexicodesignthesejointsbyprovidinghoopsaroundthehooksofthatreinforcementinordertoachieveitsrequiredcontinuity.However,thispracticeisnotcoveredintheAC
8、IBuildingCode-15-(ACI318-02),norintheMexicoCityBuildingCode(MCBC,1993).Partofthisr
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