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ID:11879061
大小:2.49 MB
页数:100页
时间:2018-07-14
《后张法预应力混凝土简支t型梁桥上部结构设计》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、内容摘要本设计为后张法预应力混凝土简支T型梁桥上部结构设计。跨径布置为25m,计算跨径24.6m,主梁全长24.96m,桥面宽度为净9m(行车道)+2×0.75m(防撞栏)。设计荷载:公路—II级;环境标准:I类环境;设计安全等级:二级。施工方法采用后张法,用金属波纹管和夹片锚具,预应力钢束用曲线形,用高强度低松弛预应力钢绞线。依据桥梁规范计算荷载验算应力然后确定桥梁的截面及其配筋情况,按照全预应力构件设计。本文主要阐述了该桥的设计、计算及验算过程。首先进行了主体设计及计算。包括主梁作用效应计算;预应力钢束的估算及其布置;钢束预应
2、力损失计算。然后进行主梁截面承载力与应力计算。主要包括承载能力极限状态计算;持久状况正常使用极限状态抗裂性验算;持久状况构件应力计算;短暂状况构件的应力验算及主梁变形验算。其次进行横隔梁和行车道板的设计。最后进行了主梁端部的局部承压验算。关键词预应力;后张法;T型梁;内力计算;强度验算·89·ThedesignofthebridgesuperstructureonCountyRoadX07Author:LiQichenInstructor:XieXiaopengAbstractThecontentofthisdesignisthe
3、excogitationforthesuperstructureofpost-tensioningprestressedconcretesimply-supportedT-beambridge.Standardlengths:25m;calculatedspan:24.6m;mainlength:24.96m;width:9m(carriageway)+2*0.75m(bull).Designload:highway-II,Environmentalstandardofenvironment:I;Designsafetylevel
4、:2.Thisdesignadoptshemethodofpost-tensioningconstructionwithmetalcorrugatedpipeandslicetheanchorage,prestressingtendonswithhighstrength,withmeasuresoflowrelaxationprestressedstrands.Accordingtothebridgestandardstocalculatetheloadandthestress.Thenascertainthesectionand
5、reinforcement,andonthebasisofthefullprestressmethodtodesignthestructuralcomponent.Myprimarypurposeinthisarticleistoconceptualizetheprocessofthedesign、calculationandcheckingcalculation.thefirststepistodesignandcalculatethemainpart,whichincludesthemaineffect;Estimationo
6、fprestressingtendonsanditslayout,Steelbeamprestresslosscalculation.Thencomputethebearingcapacity-andstress-ofthesectionofthemaingirder,mainlyincludingthebearingcapacity·89·calculationlimitstate,Lastingconditionnormaluselimitstatecracking-resistance,checking,Lastingcon
7、dition;structuralstresscomputationBrieflystateofstresscalculationandstructuraldeformationcalculationgirder.Thesecond,designtheDrivewayplate.Finallycheckthepartialpressureoftheendsofthemaingirder.KeywordsPrestressed;post-tensioning;T-beam;Internalforcecalculation;Stren
8、gthcalculation;G-Mmethod·89·毕业设计(论文)原创性声明和使用授权说明原创性声明本人郑重承诺:所呈交的毕业设计(论文),是我个人在指导教师的指导下进行的研究工作及取得的成果。尽我所知,除文中特别加以标注和致谢的地方外,不包
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