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1、第43卷第3期土木工程学报Vo.l43No.32010年3月CHINACIVILENGINEERINGJOURNALMar.2010钢筋混凝土T型叠合梁静力性能试验研究杨云俊薛伟辰(同济大学,上海200092)摘要:本文研究的钢筋混凝土T型叠合梁包括两种,其中叠合梁一由倒T型预制梁、预制板和现浇板组成,叠合梁二由矩形预制梁、预制板和现浇板组成。进行了两种叠合梁及现浇对比梁在单调荷载下的足尺模型试验,对叠合梁的破坏形态、预制梁与预制板之间和预制板与现浇板之间的滑移、截面整体工作性能、正截面受弯承载
2、力与位移延性等进行了研究。研究表明:叠合梁与现浇梁均发生了弯曲破坏;在受力全过程中,叠合梁的截面应变分布满足平截面假定的要求;峰值荷载作用下,叠合梁中实测的预制梁与预制板之间和预制板与现浇板之间的滑移分别小于0.15mm和0.09mm,表明本文采取的叠合面抗剪构造措施是有效的;叠合梁的正截面受弯承载力较相应的现浇梁低4%~12%;3个试件都具有良好的延性特性,其位移延性系数均大于6.0,且叠合梁的位移延性较现浇梁的低1%~15%。研究结果表明,本文研究的两种钢筋混凝土T型叠合梁与现浇对比梁的总体
3、性能均较为接近,均可满足工程设计要求。关键词:钢筋混凝土T型叠合梁;单调荷载;破坏形态;正截面抗弯承载力;位移延性;滑移中图分类号:TU375.1文献标识码:A文章编号:1000-131X(2010)03-0001-07ExperimentalstudyonthestaticbehaviorofreinforcedconcretecompositeT-beamsYangYunjunXueWeichen(TongjiUniversity,Shanghai200092,China)Abstract:
4、Twotypesofful-lscalereinforcedconcretecompositeT-beamsarestudied:CompositeBeamOnecomprisesprecastinvertedT-beam,precastslabandcas-tin-place(CIP)slab,whileCompositeBeamTwoconsistsofprecastrectangularbeam,precastslabandCIPslab.Monotonictestsareconducte
5、donthetwotypesofbeamsandaCIPcontrolspecmientoinvestigatethefailuremode,theslipsbetweenprecastbeamandprecastslab,andbetweenprecastslabandCIPslab,monolithicactionoftheentirecrosssection,positiveandnegativeflexuralstrengthsofnormalsectionanddisplacement
6、ductility,etc.TheresultsindicatedthatbothofthecompositebeamsandtheCIPcontrolspecmienfailedinbending.Planesectionismaintainedinthecompositebeamsthroughoutthetestingprocess.Themeasuredslipsbetweenprecastbeamandprecastslab,andbetweenprecastslabandCIPsla
7、barelessthan0.15mmand0.09mmunderthepeakload,respectively,revealingtheeffectivenessofthemeasuresforhorizontalshearresistanceatthecombinedinterfaceofcompositebeams.Theflexuralstrengthofnormalsectionofcompositebeamsis4%~12%lowerthanthatoftheCIPcontrolsp
8、ecmien.Allspecmiensexhibitedgoodductility,withthedisplacementductilityfactorlargerthan6.0,andthedisplacementductilityofthecompositebeamsisabout1%~15%lowerthanthatoftheCIPcontrolspecmien.Ingenera,ltheoverallbehaviorsofthetwotypesofcompositebeamsaresmi
