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ID:36666409
大小:1.21 MB
页数:6页
时间:2019-05-13
《预制装配式组合剪力钉试验研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、桥梁建设2015年第45卷第5期(总第234期)6OBridgeConstruction,Vo1.45,No.5,2015(TotallyNo.234)文章编号:1003—4722(2015)05—0060—06预制装配式组合剪力钉试验研究李成君,周志祥,苏慈。,范亮(1.重庆交通大学土木工程学院,重庆400074;2.广东省长大公路工程有限公司,广东广州510620)摘要:为研究预制装配式组合剪力钉(PCSS)的抗剪性能,考虑剪力钉布置形式、剪力钉个数、钢与混凝土界面粘结对抗剪性能的影响,设计制作了9组试件(8组PCSS试件和1组常规剪力钉试件),采用MTS
2、5000kN试验机进行推出试验,分析试件的破坏形式、极限承载力、滑移性能和抗剪刚度。结果表明,与常规剪力钉相比,PCSS试件的极限承载力较高,其破坏形态为延性破坏;剪力钉越多,PCSS试件的承载力越高,但PCSS试件的荷载~滑移曲线的趋势不受剪力钉个数的影响;钢与混凝土界面的粘结程度越高,PCSS试件的抗剪承载力和抗剪刚度也越大。建议不考虑界面粘结对承载力的提高作用,以钢与混凝土界面全光滑粘结试验值作为设计依据,提高结构安全储备。关键词:组合梁桥;剪力钉;预制装配式;推出试验;承载力;界面粘结;滑移;刚度中图分类号:U448.216;U422.55文献标志码:
3、AExperimentalStudyofPrefabricatedCompositeShearStudsLICheng—jun,ZHOUZhi—xiang,SUCi,FANLiang(1.SchoolofCivilEngineering,ChongqingJiaotongUniversity,Chongqing400074,China;2.GuangdongChangdaHighwayEngineeringCo.,Ltd.,Guangzhou510620。China)Abstract:Tostudytheshearperformanceoftheprefabr
4、icatedcompositeshearstuds(PCSS),9groupsofthespecimens(8groupsofthePCSSand1groupoftheconventionalshearstuds)weredesignedandfabricated,consideringtheinflueneesofthelayoutandnumbersoftheshearstudsandbindingofthesteelandconcreteinterfacesontheshearperformance.Thepush—outtestsforthespeci
5、mensweremadeontheMTS5000kNtestmachineandthefailuremodes,ultimatebear—ingcapacity,slipcharacteristicsandshearstiffnessofthespecimenswereanalyzed.Theresultsoftheanalysisrevealthatascomparedtotheconventionalshearstuds,theultimatebearingcapacityofthePCSSiShighandthefailuremodesofthePCSS
6、aretheductilefailure.Themoretherlum—bersofthePCSSare,thehigherthebearingcapacityofthePCSSspecimenswillbe,however,thedevelopmenttrendoftheloadslipcurvesofthespecimensiSnotinfluencedbythenumbersofthePCSS.Thehigherthebindingdegreeofthesteelandconcreteinterfacesis,thegreatertheshearcapa
7、cityandshearstiffnessofthePCSSspecimenswillbe.Itishenceproposedthatthestructuralsafetymarginshouldbeenhanced,takingthetestvaluesofthecompletelysmoothbindingofthesteelandconcreteinterfacesasthedesignbasis,notconsideringthefunctionofthebindingforin—creasingthebearingcapacity.Keywords:
8、compositebeambridge
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