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时间:2019-05-11
《FRP型材一混凝土组合梁桥界面抗剪计算模型与试验》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、桥梁建设2014年第44卷第1期(总第224期)44BridgeConstruction,Vo1.44,No.1,2014(TotallyNo.224)文章编号:1003—4722(2014)O1—0044—06FRP型材一混凝土组合梁桥界面抗剪计算模型与试验王景全,李嵩林,吕志涛(1.东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096;2.招商局重庆交通科研设计院有限公司,重庆400067)摘要:为研究FRP型材一混凝土界面抗剪性能与设计计算方法,针对规范推荐的胶接FRP剪力键形式,从细观角度,取胶层为计算分析对象,推导出粘结胶层所受剪应力分布规律的解析
2、解。依据界面连接材料的强度准则,对界面存在的3种失效模式(胶层剪切破坏、FRP剪力键直剪破坏、混凝土板局部压碎)提出界面承载力计算模型。对2根跨度为2600mm、高度为300mln的FRP工字梁一混凝土板组合梁进行试验,试验结果表明:所提出的FRP型材一混凝土组合梁的界面承载力计算公式与试验结果吻合良好,能够较准确地预测胶接FRP剪力键的抗剪承载力及界面破坏类型。关键词:组合梁;复合材料;胶接;FRP剪力键;强度准则;界面抗剪承载力;计算模型;试验中图分类号:U448.216;TU398.9;TU599文献标志码:ACalculationModelandTestofInter
3、faceShearPerformanceofSectionalFRP·-ConcreteCompositeBeamBridgeWANGJing—quan.LISong—lin.LUZhi—tao(1.KeyIaboratoryofConcreteandPrestressedConcreteStructuresofMinistryofEducation,SoutheastUniversity,Nanjing210096,China;2.ChinaMerchantsChongqingTransportResearchandDesignInstituteCo.,Ltd.,Chong
4、qing400067,China)Abstract:TostudytheinterfaceshearperformanceandtherelateddesignandcalculationmethodsforthesectionalFRPconcretecompositebeambridge,thebindinglayerofthebridgeWaStakenastheobjectforcalculationandanalysisandtheanalyticalsolutiontOtheshearstressdistributionlawofthebindinglayerwa
5、sderivedfromtheangleofmicroscopeaccordingtOtheboundFRPshearconnectorsasrecommendedinthecode.Incompliancewiththestrengthcriteri—onoftheinterfacebindingmaterial,thecalculationmodelfortheinterfacebearingcapacityof3typesoftheinterfacefailuremodes(e.g.theshearfailureofthebindinglayer,directfailu
6、reoftheFRPshearconnectorsandlocalcrushingoftheconcreteslab)wasproposedand2compositebeamsmadeupoftheFRPIbeamsandconcretedeckslabswithspanlengthbeing2600mmanddepth300mmweretested.Theresultsofthetestindicatethatthatthecalculationsoftheproposedformulae:fortheinterfacebearingcapacityofthesection
7、alFRP—concretecompositebeamsareagreeablewiththeresuhsofthetestandtheformulaecancorrectlypredicttheshearcapacityandtheinterfacefailuremodesoftheboundFRPshearconnectors.Keywords:compositebeam;compositematerial;binding;FRPshearconnector;strengthcriterion;in
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