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ID:36625063
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页数:5页
时间:2019-05-13
《将金山特大桥高墩大跨连续梁桥设计》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、将金山特大桥高墩大跨连续梁桥设计刘天培69文章编号:1003—4722(2011)05~0069—05将金山特大桥高墩大跨连续梁桥设计刘天培(中铁第四勘察设计院集团有限公司,湖北武汉430063)摘要:将金山特大桥主桥由一跨32m预应力混凝土T梁桥和(60.75+4×100+60.75)m预应力连续梁桥组成。预应力连续梁桥主梁采用单箱单室直腹板变截面箱形梁,设置三向预应力体系。采用恒载与1/2活载所产生的挠度之和对主梁反向设置预拱度。在各活动支座处设顺桥向水平预偏值。采用圆端形桥墩,1号墩为实体墩,2~6号墩为空心墩,均采用
2、群桩基础。采用BSASV3.76软件对主梁进行平面静力分析,采用“桥梁博士”软件分析箱梁截面横向受力并对3种车型通过桥梁时的车桥系统空间动力响应进行计算。计算结果表明:桥梁设计均满足规范要求,桥梁具有良好的动力特性及列车走行性,列车通过桥梁时的安全性和乘坐舒适性均满足要求。关键词:连续梁桥;桥梁设计;静力分析;动力响应;有限元法中图分类号:U442.5;U448.215文献标志码:ADesignofHigh—RisePierandLongSpanContinuousGirderBridgeofJiangjinshanBrid
3、geLIUTian—pei(ChinaRailwaySiyuanSurveyandDesignGroupCo.,Ltd.,Wuhan430063,China)Abstract:ThemainbridgeoftheJiangjinshanBridgeconsistsofa32一mspanprestressedcon—crete(PC)T—girderbridgeandaPCcontinuousgirderbridgewithspanarrangement(60.754-4×10O+60.75)m.Themaingirderof
4、thecontinuousgirderbridgeemploysthevariablecrosssee—tionboxgirderhavingsinglecellsingleboxandverticalwebsandthegirderisprovidedwiththree-·wayprestressingsystemandwithreverseprecamberintermsofsumofthedeflectionresul-_tingfromdeadloadand1/2liveload.Ateachmovablebeari
5、ng,thehorizontalpre—offsettinga—mountissetlongitudinallyalongthebridge.Thepiersofthebridgearedesignedastheround—endpiers。ofwhichthepierNo.1isthesolidpierwhilethepiersNo.2~6arethehollowpiers,allrestingongrouppilefoundations.ThesoftwareBSASV3.76isusedtoanalyzetheplan
6、arstaticforceofthemaingirderandthesoftwareBridgeDoctorisusedtoanalyzethetransverseforcesinthecrosssectionsoftheboxgirderandtocalculatethespatialdynamicresponseofvehicle—bridgesystemofthreetypesofthevehiclesthatwillpassthroughthebridge.Theresultsofthecalcula—tiondem
7、onstratethatthedesignofthebridgecansatisfytherelevantrequirementsinthecodes,thebridgehasgooddynamicperformance,traintravelingcapacityandthesafetyandpassengercomfortwhentrainstravelthroughthebridgecanmeettherequirementsaswel1.Keywords:continuousgirderbridge,bridgede
8、sign,staticanalysis,dynamicresponse,finiteelementmethod收稿日期:2011—04—22作者简介:刘天培(1~71一),男,高级工程师,1994年毕业于兰州铁道学院桥梁工程专业,工学学士(1iutianpeib@163.corn)。桥梁建
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