关 键 词：

郑家驿 大桥 施工图 设计

资源描述：

郑家驿大桥施工图设计,郑家驿,大桥,施工图,设计

内容简介：

连续梁桥；预应力混凝土；迈达斯软件 郑家驿大桥施工图设计郑家驿大桥施工图设计摘要 本设计为郑家驿大桥施工图设计。根据设计任务书提供的设计资料与要求，根据现行公路桥梁设计规范，结合“技术先进、安全可靠、适用耐久、经济、美观、环境保护和可持续发展”的桥梁设计原则，确定该桥梁方案为：45m+80m+45m的三跨预应力混凝土变截面连续梁桥。其后，拟定主梁主要构造及细部尺寸，然后根据设计的要求，进行结构自重，汽车荷载，人群荷载，温差应力及基础沉降内力计算，最后布置预应力钢束和构造钢筋。最后进行验算，其中包括截面强度验算，抗裂验算，持久状况构件的应力验算,短暂状况应力验算和挠度验算。经验算表明该设计计算方法正确，内力分布合理，符合设计任务的要求。关键词： 郑家驿大桥施工图设计THE CONSTRUCTION DRAWING DESIGN OFZHENGJIAYIBRIDGE APPROACHABSTRACT The design is for the construction drawing design ofZheng jia yi bridge approach .According to the design specification for the data and requirement, and the current highway bridge design specifications, combined with the principles of bridge design-advanced , safe and reliable, durable, economic, beautiful, environmental and sustainable ,the scheme of 45m+60m+45m three-span prestressed concrete continuous girder bridge is taken. Then, Studying out the main girder structure and detailed dimensions, and then calculating internal force of structural weight, vehicle load,crowd load, thermal stress and the settlement with the basis of design requirements, and finally layout prestressed tendons and constructional reinforcement. Finally, Its checking, including checking cross-section strength, crack resistance checking, persistent component of the stress condition checking, transient state of stress checking and checking deflection. Experience shows that the design calculation method is correct, the internal force distribution is reasonable and meets the design tasks.Key words:scheme comparison; variable cross-section continuous box girder; construction drawing design. 郑家驿大桥施工图设计目录1 概况与方案比选.1 1.1 设计概述.1 1.1.1 设计依据.1 1.1.2 技术标准.1 1.1.3 采用规范.1 1.2 桥型方案.1 1.2.1 构思宗旨.1 1.2.2 桥型方案比选.22 结构尺寸拟定和材料选用.8 2.1 上部结构尺寸的拟定.8 2.1.1 顺桥向尺寸的拟定.8 2.1.2 横桥向尺寸的拟定.82.2 基本材料的选用.10 2.2.1 钢筋.10 2.2.2 混凝土.10 2.2.3 锚具.113 结构内力计算.12 3.1 结构计算简图.12 3.2 截面几何特性计算.13 3.3 恒载内力计算.14 3.4 温度内力计算.15 3.5 支座内力计算.25 3.6 活载内力计算.26 3.7 荷载组合计算.28 3.7.1 承载能力极限状态.28 3.7.2 正常使用极限状态.32 郑家驿大桥施工图设计4 配筋计算与结构验算.37 4.1 预应力钢筋数量估算.37 4.2 预应力筋估算结果.38 4.3 预应力筋的布束原则.42 4.4 预应力筋的布束结果.43 4.5 布束后的内力组合.45 4.5.1 承载能力极限状态.45 4.5.2 短期效应组合.45 4.5.3 长期效应组合.46 4.6 主梁正截面强度验算.47 4.7 主梁截面抗裂验算.56 4.7.1 规范要求.56 4.7.2 正截面抗裂验算.58 4.7.3 斜截面抗裂验算.62 4.8 短暂状况构件的内力验算.68 4.9 持久状况构件的应力验算.76 4.9.1 正截面混凝土压应力验算.76 4.9.2混凝