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1、橋梁建設(shè)2013年第43卷第3期(總第220期)48BridgeConstruction，Vo1．43，No．3，2013(TotallyNo．220)文章編號：1003—4722(2013)03—0048—06大跨度鋼一混組合梁橋剪力群釘受力分析研究趙建，鄭舟軍(1．武漢橋梁建筑工程監(jiān)理有限公司，湖北武漢430034；2．中鐵大橋局集團(tuán)橋科院有限公司，湖北武漢430034)摘要：組合梁仿真分析時將多個剪力釘簡化成一個等效剪力群釘進(jìn)行模擬，不能準(zhǔn)確得到每個剪力釘?shù)氖芰η闆r。為解決此問題，根據(jù)實橋集束式剪力釘布置方式制作剪力
2、群釘推出試件，并進(jìn)行推出試驗，得知群釘中最不利的單個剪力釘承擔(dān)了32～37的總剪力(平均值僅為25)；由大跨度組合箱梁整體模型計算得到剪力群釘受力均值、鋼一混凝土相對位移及鋼梁與混凝土橋面板的受力狀況；根據(jù)剪力群釘荷載分配比例對組合梁整體計算得到的剪力釘計算結(jié)果進(jìn)行修正。結(jié)果表明，將剪力群釘受力均值換算得到剪力釘受力極值的方法，可實現(xiàn)對大跨度組合梁及其剪力釘?shù)木_仿真分析。關(guān)鍵詞：組合梁；剪力釘；鋼一混結(jié)構(gòu)；剪力群釘；仿真分析；模型試驗；有限元法中圖分類號：U448．38文獻(xiàn)標(biāo)志碼：AAnalysisandStudyofF
3、orceConditionsofGroupShearStudsofLongSpanSteelandConcreteCompositeGirderBridgeZHAOdian，ZHENGZhou-jnil(1．WuhanBridgeandBuildingWorksSupervisionCo．，Ltd．，Wuhan430034，China；2．BridgeScienceResearchInstituteLtd．，ChinaRailwayMajorBridgeEngineeringGroup，Wuhan430034，China)
4、Abstract：Whenthesimulationanalysisofacompositegirderismade，thewayofsimplifyingthemultipleshearstudsofthegirderintotheequivalentgroupshearstudscannotexactlyacquiretheforceconditionofeachstud．Tosolvetheproblem，thepush—outspecimenofthegroupshearstudswasfabricatedacco
5、rdingtotheclusteringlayoutoftheshearstudsofthepracticalbridge，thepushouttestforthespecimenwascarriedoutanditwasconsequentlyknownthatthesinglestudinthegroupshearstudsundertheworstforceconditionsustained32～37ofthetotalshearforce(whiletheaveragevaluewas25only)．Fromth
6、ecalculationoftheintegralmodelofthelongspancompositeboxgirder，theforceaveragevaluesofthegroupshearstuds，therela—tivedisplacementofthesteelandconcreteandtheforceconditionsofthesteelgirderandconcretedeckslabswereacquiredandwithreferencetotheloaddistributionratiosoft
7、hegroupshearstuds，thecalculationresultsoftheshearstudsweremodified．Theresultsofthecalculationandmodificationdemonstratethatbywayofconvertingfromtheforceaveragevaluesofthegroupshearstudstotheforceultimatevaluesoftheshearstuds，theaccuratesimulationanalysisofthelongs
8、pancompositegirderanditsshearstudscanberealized．Keywords：compositegirder；shearstud；steelandconcretestructure；groupshearstuds；simulationanalysis；modeltes
