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时间:2019-05-11
《乌苏大桥主桥上部结构设计与计算》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、乌苏大桥主桥上部结构设计与计算康晋,肖海珠,徐伟55文章编号:1003—4722(2011)Ol~0055—04乌苏大桥主桥上部结构设计与计算康晋,肖海珠,徐伟(中铁大桥勘测设计院有限公司,湖北武汉430056)摘要:乌苏大桥主桥为独塔单索面斜拉桥,跨径布置为(140+140)m,采用塔、墩、梁固结体系,综述该桥上部结构设计与计算。主梁为带大挑臂的钢箱结合梁,中间钢箱梁采用单箱双室截面,两侧钢挑臂为变高度工字形梁,挑臂端部设槽形小纵梁;混凝土桥面板厚25em,与钢梁通过剪力钉连接;塔根部主梁采用预应力混凝土箱梁,以方便与桥塔固结;桥塔采用独柱式塔,高117m;斜拉
2、索为竖琴形中央平行索面布置,采用低松弛镀锌高强度平行钢丝柬。采用有限元软件MIDASCivil2006及SCDS程序对该桥进行结构计算分析,结果表明该桥的静力、稳定及动力特性均满足规范要求。关键词:斜拉桥;结合梁;混凝土桥塔;桥梁设计;计算;结构分析中图分类号:U442.5;U448.27文献标志码:ADesignandCalculationofSuperstructureofMainBridgeofWusuBridgeKANGJin,xIA0Hai-zhu,XUWei(ChinaRailwayMajorBridgeReconnaissance&DesignIns
3、tituteCo.,Ltd.,Wuhan430056,China)Abstract:ThemainbridgeoftheWusuBridgeisasinglepylonandsinglecableplanecable—stayedbridgewithspanarrangement(140+140)mandwithastructuralsystemofrigidfixityofthepylon,pierandgirder.Asummarizedaccountofthedesignandcalculationofthesuperstruc—tureofthebridg
4、eispresentedherewith.Themaingirderofthebridgeisacompositegirderwithlongcantilevers,thecentralpartofthegirderisdesignedasatwo—cellandsingle—boxsteelgirderandthesteelcantileverateachsideofthegirderisthevariabledepthI—beamandisprovidedwihtatroughstringeratthefarside,whicharealltoppedwith
5、25cmthickconcretedeckslabsconnectedwiththegirderviashearingstuds.Thepartofthemaingirderclosetothepylonisde—signedasaprestressedconcreteboxgirdertofacilitatethefixityofthegirderwiththepylon.Thepylonisthesinglecolumnpylon。117minheight.Thestaycables,madeupoflowrelaxationgalvanizedhighstr
6、engthparallelsteelwirestrands,areoftheharppatterncableplanearrangedinthecentralalignmentofthebridgedeck.ThefiniteelementsoftwareMIDASCivil2006andtheSCDSprogrammeareemployedtocalculateandanalyzestructureofthebridge.Theresultsofthecalculationandanalysisindicatethatthestatic,stabilityand
7、dynamiccharacteristicsofthebridgecanmeettherequirementsintherelevantcodes.Keywords:cable—stayedbridge;compositegirder;concretepylon;bridgedesign;calcula—tion:structuralanalysis收稿日期:2010—0921作者简介:康晋(1978一),男,工程师,2001年毕业于长安大学桥梁工程专业,工学学士,2004年毕业于长安大学桥梁与隧道工程专业,工学硕士(kangJf@brdi.com.cn)。56桥
8、梁建设g0
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