a预应力混凝土连续箱梁桥设计

thedepartmentsfocusonOffice,activelycarryoutvisitsconstructionproblem-solvingpublicpolicyadvocacy,andproperlyhandlevarioustypesofpetitioncases,atotalof289receptionprocesspetitioncasesand2132(times).Attachgreatimportancetosafetyeducationstrengtheningtheworkoflettersandcallsandsecurity,closerlinksbetweentheGovernmentandthemasses.Inordertodotheworkoflettersandcalls,andtosolveproblemsforpeople,ourGovernmentAffairsHallreceptionoflettersandcallsintoestablishedmunicipalgovernmentreceptiondaysystemandleadershipstandingreceptionoflettersandcallssystem,takeadvantageoftheGovernmentAffairsHall郑州大学毕业设计（论文）题目：三跨预应力连续箱梁桥设计（3×30m）指导教师：李清富职称：教授郑元勋职称：讲师学生姓名：郭小帅学号：20070510309专业：水利水电工程（道路桥梁方向）院（系）：水利与环境学院完成时间：2011-5-312011年6月2日thedepartmentsfocusonOffice,activelycarryoutvisitsconstructionproblem-solvingpublicpolicyadvocacy,andproperlyhandlevarioustypesofpetitioncases,atotalof289receptionprocesspetitioncasesand2132(times).Attachgreatimportancetosafetyeducationstrengtheningtheworkoflettersandcallsandsecurity,closerlinksbetweentheGovernmentandthemasses.Inordertodotheworkoflettersandcalls,andtosolveproblemsforpeople,ourGovernmentAffairsHallreceptionoflettersandcallsintoestablishedmunicipalgovernmentreceptiondaysystemandleadershipstandingreceptionoflettersandcallssystem,takeadvantageoftheGovernmentAffairsHall1目录摘要......................................................................................................................10绪论......................................................................................................................31设计基本资料......................................................................................................51.1.工程概况...........................................................................................................................51.2.设计标准...........................................................................................................................51.3.桥梁设计...........................................................................................................................52设计要点及结构尺寸拟定..................................................................................72.1设计要点...........................................................................................................................72.2结构尺寸的拟定...............................................................................................................83主梁作用效应的计算........................................................................................113.1自重作用效应的计算....................................................................................................113.2汽车荷载的效应.............................................................................................................173.3温差应力的计算.............................................................................................................263.4支座沉降的计算.............................................................................................................283.5内力组合.........................................................................................................................284预应力钢筋的估算与布置................................................................................364.1钢束的估算.....................................................................................................................364.2钢束的布置.....................................................................................................................374.3主梁净、换算截面几何特性计算.................................................................................385预应力损失及有效预应力计算........................................................................405.1基本理论........................................................................................................................405.2预应力损失计算.............................................................................................................406配束后主梁内力计算及内力组合....................................................................497截面强度验算....................................................................................................527.1基本理论.........................................................................................................................527.2计算公式.........................................................................................................................528抗裂验算............................................................................................................56thedepartmentsfocusonOffice,activelycarryoutvisitsconstructionproblem-solvingpublicpolicyadvocacy,andproperlyhandlevarioustypesofpetitioncases,atotalof289receptionprocesspetitioncasesand2132(times).Attachgreatimportancetosafetyeducationstrengtheningtheworkoflettersandcallsandsecurity,closerlinksbetweentheGovernmentandthemasses.Inordertodotheworkoflettersandcalls,andtosolveproblemsforpeople,ourGovernmentAffairsHallreceptionoflettersandcallsintoestablishedmunicipalgovernmentreceptiondaysystemandleadershipstandingreceptionofletter