简支梁桥T梁计算,含下部结构

安徽工业大学毕业设计（论文）摘要此次设计的内容为南京汉中桥的设计。设计采用预应力混凝土简支T型梁桥，桥梁跨径设置为（2×30）m，双向六车道；单幅桥宽为13m，主梁为T型梁，梁高为1.8m；按后张法施工工艺制作主梁。本文主要阐述了该桥的上部结构与下部结构的设计和计算过程。首先对主桥进行总体结构设计，拟定上部结构尺寸，然后对上部结构进行恒载和活载内力计算，内力组合，预应力钢束的估算和布置及预应力损失计算，再进行截面强度、应力验算，最后进行变形验算。具体包括以下几个部分：桥梁结构布置；截面结构各部分尺寸拟定；主梁作用效应计算；预应力钢束的估算及布置；预应力损失及有效预应力计算；截面强度验算；抗裂验算；持久状况构件的应力验算；挠度验算，横隔梁与行车道板计算。接着进行桥梁下部结构的设计计算，主要有支座尺寸拟定与计算，钻孔灌注桩、双柱式桥墩的计算。对于下部结构的盖梁、墩、柱和桥台分别进行初步设计，然后计算其荷载效应，截面配筋与截面承载力计算。关键词：预应力混凝土简支T梁桥、上部结构、下部结构、结构设计、荷载效应、验算安徽工业大学毕业设计（论文）AbstractThedesignofthecontentsofthedesignofNanjingHanzhongBridge.DesignofprestressedconcretesimplysupportedT-beambridge,thebridgespanissetto(2×30)m,two-waysix-lane;singlebridgewidthof13m,themainbeamfortheT-beam,beamheightof1.8m;bypost-Zhangconstructionmethodofmakingthemainbeam.Thispapermainlyelaboratesthedesignandcalculationprocessoftheupperstructureandthelowerstructureofthebridge.First,theoverallstructureofthemainbridgedesign,thesizeoftheupperstructure,andthentheupperstructureofthedeadloadandliveloadcalculation,internalforcecombination,prestressedsteelbeamestimationandlayoutandprestresslosscalculation,andthensectionstrength,stressCheck,andfinallythedeformationcheck.Includingthefollowingparts:thelayoutofthebridgestructure;thesizeofthecross-sectionofthestructureofthepreparationofthemainbeameffectcalculation;prestressedsteelbeamestimationandlayout;prestressedlossandeffectiveprestresscalculation;sectionstrengthcheck;Stresscheckofpermanentconditioncomponents;deflectioncheck,transversebeamandlaneplatecalculation.Thenthedesignandcalculationofthelowerpartofthebridgearecarriedout.Thecalculationandcalculationofthebearingsize,thecalculationoftheboredpilesandthedouble-columnpiersaremainlycarriedout.Forthelowerstructureofthecoverbeam,piers,columnsandabutmentwerepreliminarydesign,andthencalculatetheloadeffect,sectionreinforcementandcross-sectionbearingcapacitycalculation.Keywords:prestressedconcretesimplysupportedT-beambridge,superstructure,lowerstructure,structuraldesign,loadeffect,check安徽工业大学毕业设计（论文）目录1、绪论......................................................................................................................................11.1前言..............................................................................................................................11.2文献综述......................................................................................................................11.2.1概况...................................................................................................................11.2.2国内桥梁管理养护现状...................................................................................11.2.3桥梁基础作用...................................................................................................21.2.4桥梁基础沉降的原因.......................................................................................21.2.5桥梁基础沉降引发的桥梁结构问题...............................................................31.2.6桥梁基础沉降处理方法...................................................................................31.2.7桥梁结构加固意义...........................................................................................51.3参考文献......................................................................................................................52、桥梁设计方案......................................................................................................................62.1方案比选的原则..........................................................................................................62.2方案比选内容..............................................................................................................62.3方案编制......................................................................................................................72.4方案比较......................................................................................................................72.5方案确定......................................................................................................................83、设计资料及构造布置..........................................................................................................93.1设计资料......................................................................................................................93.2技术标准.....................................................................................................................93.3气象水文......................................................................................................................93.4设计依据......................................................................................................................93.5基本计算数据............................................................................................................103.6横截面布置................................................................................................................103.6.1主梁间距与主梁片数.....................................................................................103.6.2主梁跨中截面主要尺寸拟定..........................................