文档介绍：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,;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、-beambridge,thebridgespanissetto(2×30)m,two-waysix-lane;singlebridgewidthof13m,themainbeamfortheT-beam,;bypost-,theoverallstructureofthemainbridgedesign,thesizeoftheupperstructure,andthentheupperstructureofthedeadloadandliveloadcalculation,bination,prestressedsteelbeamestimationandlayoutandprestresslosscalculation,andthensectionstrength,stressCheck,:thelayoutofthebridgestructure;thesizeofthecross-sectionofthestructureofthepreparationofthemainbeameffectcalculation;prestressedsteelbeamestimationandlayout;prestressedlossandeffectiveprestresscalculation;sectionstrengthcheck;ponents;deflectioncheck,,thecalculationoftheboredpilesandthedouble-,piers,columnsandabutmentwerepreliminarydesign,andthencalculatetheloadeffect,sectionreinforcementandcross-:prestressedconcretesimplysupportedT-beambridge,superstructure,lower structure,structuraldesign,loadeffect,check目录1、绪论 31.