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低周反复荷载下型钢混凝土柱滑移性能试验研究(英文).docx

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低周反复荷载下型钢混凝土柱滑移性能试验研究(英文) ExperimentalStudyonSlipBehaviorofSteel-ConcreteColumnsSubjectedtoLow-CycleRepeatedLoading Abstract: Theslipbehaviorofsteel-concretecolumnssubjectedtolow-cyclerepeatedloadingisanimportantfactoraffectingtheseismicperformanceofstructures.Inthisstudy,aseriesoftestswereconductedon6specimensofsteel-concretecolumnswithdifferentsteelratiosandslabthicknesses.Thespecimensweresubjectedtolow-cyclerepeatedloadingwithdifferentamplitudestosimulatetheunderearthquakeloadactionprocessofthecolumns.Theslipbehavior,includingcrackopening,slipdisplacement,andenergydissipation,wereinvestigatedandanalyzed.Theresultsindicatedthattheslipbehaviorofsteel-concretecolumnsvariedwiththesteelratio,slabthickness,andloadingamplitude.Theslipdisplacementandenergydissipationofthecolumnsincreasedwiththeincreasingsteelratioandslabthickness,whilethecrackopeningdecreased.Moreover,theloadingamplitudealsohadasignificantinfluenceontheslipbehavior. Introduction: Theslipbehaviorofsteel-concretecolumnsunderlow-cyclerepeatedloadingisanimportantissueinseismicdesignandassessmentofstructures.Inrecentyears,researchershaveconductednumerousexperimentalstudiesontheslipbehaviorofsteel-concretecolumnssubjectedtovariousloadingconditions.However,mostoftheresearchhasfocusedonthecyclicbehaviorofcolumnsundermonotonicorconstantamplitudeloadingandlittleattentionhasbeenpaidtotheeffectofloadingamplitudeontheslipbehaviorofthecolumnsunderlow-cycleloading. Inthisstudy,weconductedaseriesoftestsonsteel-concretecolumnstoinvestigatetheeffectofloadingamplitudeontheslipbehaviorofthecolumns.Themainobjectiveofthispaperistopresenttheresultsoftheexperimentalstudyandanalyzetheinfluenceofthesteelratio,slabthickness,andloadingamplitudeontheslipbehaviorofthecolumns. ExperimentalProgram: Inthisstudy,6specimensofsteel-concretecolumnswerefabricatedwithdifferentsteelratiosandslabthicknesses.Thedimensionsofthecolumnswere200mm×200mm×2000mm,andtheslabthicknesseswere20mm,30mm,and40mm.Thesteelratiosofthespecimenswere1.0%,1.5%,and2.0