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内置圆钢管混凝土的异形柱-组合梁装配式中节点抗震性能试验研究.docx

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内置圆钢管混凝土的异形柱-组合梁装配式中节点抗震性能试验研究 Title:ExperimentalStudyonSeismicPerformanceofCompositeBeamswithUnconventionalColumn-CompositeConnectionsusingBuilt-inCircularSteelTubes Abstract: Thispaperpresentsanexperimentalstudyontheseismicperformanceofcompositebeamswithunconventionalcolumn-compositeconnectionsusingbuilt-incircularsteeltubes.Theaimofthisresearchistoinvestigatethebehaviorandperformanceofthenovelconnectionsystemunderseismicloadingconditions.Thestudyfocusesoncharacterizingthelateralloadcapacity,hystereticbehavior,andenergydissipationcapacityoftheconnectionsystem.Theexperimentalresultsprovidevaluableinsightsintotheseismicperformanceofcompositebeamswithunconventionalcolumn-compositeconnections,aidingindevelopingmoreefficientandreliableseismicdesignmethodsforcompositestructures. 1.Introduction: Compositestructures,consistingofconcreteandsteelelements,havegainedpopularityduetotheiradvantageouscharacteristicssuchashighstrength,ductility,andrapidconstruction.Theconventionalconstructionmethodofcompositestructurestypicallyinvolvesweldingsteelplatestotheprecastconcretecolumns.However,thismethodhascertaindisadvantagessuchastheneedforsitewelding,whichincreasesconstructiontimeandcosts.Toaddresstheseissues,anovelconnectionsystemhasbeenproposedutilizingbuilt-incircularsteeltubesinthecompositebeams.Thissystemeliminatestheneedforon-siteweldingandsimplifiestheconstructionprocess.Thispaperaimstoinvestigatetheseismicperformanceofcompositebeamswithbuilt-incircularsteeltubeconnections. 2.ExperimentalProgram: Theexperimentalprograminvolvedconstructingmultiplecompositebeam-columnspecimenswithbuilt-incircularsteeltubes.Thespecimensweresubjectedtocycliclateralloadingtosimulateseismicconditions.Themainparametersinvestigatedinthisstudyincludetheheightanddiameterofthecircularsteeltubes,thesizeandshapeofthecompositebeam,aswellastheaxialloadratioonthecolumns.Thetestingsetupincludedappropriateinstrumentationtomeasurethelateraldisplacement,load,andstrainsindifferentcomponentsofthespecimens. 3.TestR