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1、第34卷第4期公路交通科技Vol．34No．42017年4月JournalofHighwayandTransportationResearchandDevelopmentApr．2017doi:10．3969/j．issn．1002-0268．2017．04．012钢-混凝土组合结构多排PBH剪力键力学行为试验研究112范亮,罗开勇,何骏(1.重庆交通大学土木工程学院,重庆400074;2.浙江省交通规划设计研究院,浙江杭州310006)摘要:为了模拟结构中的真实受力方式,在PBH剪力键(PerfobondHo
2、op)单排受力研究的基础上,开展了以排数和排间间距为主要参数的多排PBH力学行为静载推出试验研究。多排PBH剪力键试验的试件排数分别为1~5排,排间间距为75~300mm,共8个试件;试验得到多排PBH剪力键的典型荷载-滑移全过程曲线、承载力、破坏形态及滑移分布规律。多排PBH剪力键试验表明,其破坏形态为混凝土劈裂破坏,穿孔钢筋受弯屈服;沿高度方向的界面滑移呈现“两端大中间小”的分布规律;在排数5排以内时,多排PBH抗剪极限承载力与剪力键排数呈近似正相关,与排间间距无明显关系。依据影响因素和分析结果,提出了相应
3、极限承载力计算公式,与试验结果吻合较好。关键词:桥梁工程;组合结构;试验研究;承载力;剪力键;多排中图分类号:TU398．9;TU317．1文献标识码:A文章编号:1002-0268(2017)04-0080-07ExperimentalStudyonMechanicalBehaviorsofMultiple-rowPBHShearConnectorsinSteel-concreteCompositeStructure112FANLiang,LUOKai-yong,HEJun(1.SchoolofCivilEn
4、gineering,ChongqingJiaotongUniversity,Chongqing400074,China;2.ZhejiangProvincialCommunicationsPlanning,Design&ResearchInstitute,HangzhouZhejiang310006,China)Abstract:Inordertosimulatetherealloadingmodeofthestructure,thestaticpush-outtestonthemechanicalbehavi
5、orsofmultiple-rowPerfobondHoop(PBH)shearconnectorsincluding8specimensisperformedconsideringtherownumber(i．e.,1-5rows)andtherowspacing(i．e.,75-300mm),basedonsingle-rowbearingresearchofPBHshearconnectors.Then,thetypicalload-slipwholeprocesscurve,thebearingcapa
6、city,thefailurepatternandtheslipdistributionofmultiple-rowPBHshearconnectorsareobtained.Theexperimentalresultofmultiple-rowPBHshearconnectorsindicatesthat(1)thefailureexhibitsthesplittingofconcreteandbendingoftheperforatedrebars;(2)theinterfaceslipalongthehe
7、ightdirectionisbigonbothendsbutsmallinthemiddle;(3)theultimateshearcapacityofmultiple-rowPBHshearconnectorswithin5rowsismainlypositivecorrelatedwiththerownumberofshearconnectors,whileitisnotobviousrelatedwiththerowspacing.Finally,basedontheinfluencingfactors
8、andtheanalysisresult,thecorrespondingbearingcapacitycalculationformulaisproposed,whichagreeswellwiththeexperimentalresultKeywords:bridgeengineering;compositestructure;experimentalresearch;bearin
