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1、第30卷第4期2009年8月建筑结构学报JournalofBuildingStructuresVol30No4Aug2009010文章编号:10006869(2009)04007807腹板嵌入式组合梁中抗剪连接件推出试验12李现辉,李国强(1.同济大学土木工程学院,上海200092;2.同济大学土木工程防灾国家重点实验室,上海200092)摘要:提出一种节省钢材且具有较高受剪承载力的新型组合梁腹板嵌入式钢混凝土组合梁,它是将倒T形钢梁腹板上部开槽,嵌入到混凝土翼板中形成的组合梁。通过10个推出试件的试验,研究腹板嵌入式组合梁中钢板连接件的受剪承载力。推出试验结果
2、表明,连接件的受剪承载力随混凝土强度等级、钢板厚度增加而提高。基于试验结果,通过参数回归分析,拟合出嵌入式组合梁连接件受剪承载力计算公式,并提出连接件的构造要求。通过与普通组合梁中栓钉连接件受剪承载力的比较表明,腹板嵌入式钢混凝土组合梁中钢板连接件具有承载力高、易于实现完全抗剪连接的优点,而且连接件抗剪连接刚度大,可以减少组合梁由于滑移效应引起的刚度折减。关键词:腹板嵌入式组合梁;抗剪连接件;推出试验;受剪承载力中图分类号:TU3989TU3171文献标识码:APushoutexpermientalstudyonshearconnectorsinembeddedcomp
3、ositebeamswithnotchedweb11,2LIXianhui,LIGuoqiang(1.CollegeofCivilEngineeering,TongjiUniversity,Shanghai200092,China;2.StateKeyLaborataryforDisasterReductioninCivilEngineering,TongjiUniversity,Shanghai200092,China)Abstract:Basedontheordinarysteelconcretecompositebeam,anovelembeddedcompositebeam
4、whichnotonlyhadhighershearbearingcapacitybutalsocouldsavesteelwasproposed.TheembeddedcompositebeamconsistsofthesteelbeamwithreverseTsectionwhichhasnotchesonthetopofthewebandisembeddedintheconcreteslab.Throughthetestof10pushoutspecmiens,thebearingcapacityoftheshearconnectorintheembeddedcomposit
5、ebeamisresearched.Testresultsshowthatthebearingcapacityoftheshearconnectorincreaseswiththemiprovementoftheconcretegradeandthethicknessofthesteelplate.Basedonthetestresults,theformulastocalculatetheshearbearingcapacityofthenotchedwebconnectorswasdevelopedbasedonparametricanalysisandtheconfigurat
6、ionrequirementsontheshearconnectorinembeddedcompositebeams.Thebearingcapacitiesoftheshearstudsinordinarycompositebeamswerecomparedwiththatoftheshearconnectorinembeddedcompositebeams,whichindicatedthatthenotchedwebconnectornotonlyhadhighershearbearingcapacityandeasierpossibilitytodeveloptotallys
7、hearconnection,butalsocoulddecreasethereductionofthestiffnessofthecompositebeamcausedbyslidingeffect.Keywords:embeddedcompositebeamwithnotchedweb;shearconnector;pushouttest;shearbearingcapacity基金项目:国家科技支撑计划项目高性能建筑结构设计关键技术研究(200
