桥梁建设2012年第42卷第3期(总第213期)BridgeConstruction,Vol.42,No.3,2012(TotallyNo.213)文章编号:1003-4722(2012)03-0070-05三跨钢-混混合连续梁桥结合段传力性能研究沈强南1,邵吉林2,徐锦1,余林芳1,何雄君3(1.浙江省长兴县交通局,浙江长兴313100;2.浙江省交通科学研究所,浙江杭州310014;3.武汉理工大学交通学院,湖北武汉430063)摘要:G318国道长桥大桥主桥为三跨钢-混混合连续梁航道桥,该桥钢-混结合段在预应力混凝土箱梁侧预埋钢接头与钢箱梁焊接。为研究该桥钢-混结合段传力性能,采用有限元软件MIDASFEA建立钢-混结合段有限元模型,对结合面钢箱梁侧腹板、结合部分混凝土及预埋钢板顶底面、钢接头部位进行应力分析。分析结果表明:该桥钢-混结合面钢箱梁侧腹板处于较好的工作状态;钢-混结合部分传力性能良好;钢-混结合部分传力机理为当弯矩荷载传递到钢垫板时,荷载主要由预埋钢接头的上、下缘承担,然后荷载通过钢板传递到混凝土,钢接头中的PBL开孔板及钢横隔板传力作用不明显。关键词:连续梁桥;航道桥;结合段;受力分析;有限元法中图分类号:U448.215文献标志码:AStudyofForceTransmittingBehaviorofJointSectionofaThree-SpanSteelandConcreteContinuousHybridGirderBridgeSHENQiang-nan1,SHAOJi-lin2,XUJin1,YULin-fang1,HEXiong-jun3(1.DepartmentofTransport,ChangxingCounty,ZhejiangProvince,Changxing313100,China;2.ZhejiangTransportationResearchInstitute,Hangzhou310014,China;3.SchoolofTransportation,WuhanUniversityofTechnology,Wuhan430063,China)Abstract:ThemainbridgeoftheChangqiaoBridgeontheNationalRoadG318isathree-spansteelandconcretecontinuoushybridgirdershippingchannelbridge.Thedesignofthesteelandconcretejointsectionofthebridgeisthatasteeljointisembeddedononesideoftheprestressedconcreteboxgirderandisthenweldedwiththeothersideofthesteelboxgirder.Tostudytheforcetransmittingbehaviorofthejointsection,thesoftwareMIDASFEAwasusedtosetupthefiniteelementmodelforthesectionandthestressinthewebsofthesteelboxgirderatthejointsurface,intheconcreteandbottomandtopoftheembeddedsteelplatesofthejointpartandinthesteeljointwasanalyzed.Theresultsoftheanalysisre-vealthatthewebsofthegirderareingoodworkingconditionsandthefor...