PAGE\*MERGEFORMAT87简支转连续桂江大桥毕业设计（论文）摘要桂江大桥位于佛山市南海区，单幅宽10m，五跨等跨径为25m，全长100m。桂江大桥简支转连续箱梁结构总体的设计，需要理解桥梁体系的转换，采用Midas软件进建立模型。设计主要内容有：恒载和活载计算，估算配筋面积，配置预应力钢束；计算细部结构的受力状况；划分各个施工阶段，对每个施工阶段进行结构安全的受力计算和分析；使用阶段进行结构永久荷载、活荷载、预应力和附加应力的计算和结构合理性的分析；承载能力极限状态和正常使用极限状态的截面验算，作出包罗图；根据上部结构的计算结果对下部结构进行设计。设计难点有：预应力的张拉控制和施工阶段的加载。关键词：简支转连续，预应力连续箱型梁，Midas软件，预应力钢束，施工阶段，恒载，活载，应力组合，包络图，截面验算。AbstractGuijiangBridgeislocatedinGuangdongProvince,isaTwo-yonghighwayoverpass,asinglewidthof10m,totallengthof100m.BanyanBridgesimplysupportedTbeamcontinuousoveralldesign,needtounderstandtheconversionofthebridgesystem,theuseofBridgeDoctorsoftwareintothemodel.Designelementsinclude:deadloadandliveloadcalculations,estimatesreinforcementsize,configurationprestressedsteelbeam,calculatedetailedstructureofthestressstate;byeachconstructionstage,constructionstageofthestructuralsafetyofeachoftheforcecalculationandanalysis;withstagestructure,permanentloads,liveloads,prestressedandadditionalstresscalculationsandstructuralanalysisofreasonableness;ultimatelimitstateandlimitstatesectionalchecking;structurecalculationbasedontheresultsoftheupperstructureofthelowerpartofthedesign.Designchallengeare:pre-stresstensioncontrolandconstructionphaseoftheload.Isimplifiedthedesign,construction,totalconstructionphase3,calculationissimple.Keywords:simplysupportedcontinuousprestressedT-beamBridgeDoctor,prestressedsteelbeams,constructionstage,deadload,liveload,stresscombination,envelope,crosschecking.目录TOC\o"1-3"\h\uHYPERLINK\l_Toc4966前言PAGEREF_Toc4966-10-HYPERLINK\l_Toc14258第一章工程概况PAGEREF_Toc14258-11-HYPERLINK\l_Toc81131.1设计基本概况PAGEREF_Toc8113-11-HYPERLINK\l_Toc75491.1.1桥梁线型布置PAGEREF_Toc7549-11-HYPERLINK\l_Toc95841.1.2主要技术标准PAGEREF_Toc9584-11-HYPERLINK\l_Toc249671.1.3主要材料PAGEREF_Toc24967-11-HYPERLINK\l_Toc270391.1.4桥面铺装PAGEREF_Toc27039-12-HYPERLINK\l_Toc132281.1.5桥面排水PAGEREF_Toc13228-12-HYPERLINK\l_Toc103011.1.6施工方式PA