精品文档---下载后可任意编辑本设计的步骤为：根据设计任务要求，依据现行公路桥梁设计法律规范,综合考虑桥位的地质、地形条件，经初选后提出了三跨连续梁桥、下乘式钢管混凝土拱桥、独塔双跨式混凝土斜拉桥三个比选桥型。按“有用、经济、安全、美观”的桥梁设计原则，比较三个方案的优缺点。比选后把下承式钢管混凝土拱桥作为主要推举设计方案，并进行了结构细部尺寸拟定、主梁内力计算、主梁和桥墩配筋设计及控制截面强度、应力验算，活载变形验算等。经分析比较及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：比选方案;三跨连续梁桥;下承式钢管混凝土拱桥;独塔双跨式混凝土斜拉桥；主要推举设计方案；结构分析;验算AbstractAbstract: the process of designment：According to the design assignment and the present Highway Bridge Specifications, Take the geological and the landform of the bridge site for further analysis, after preliminary selection, three bridge type schemas are presented, they areThree-span continuous beam bridge, Xia Sheng-type steel arch bridgeand Single tower cable-stayed double-span concrete.Comparing their characters comprehensively, theXia Sheng-type steel arch bridgeis selected as the main design scheme by the philosophy of bridge design as “Practicability, Economy, Security, Beauty”. Through drawing up of structure’s dimension, internal force calculation of dead and living load, prestressed steel design, hypoforce calculation, assessment of prestressing loss, checking computation and pier of key section intension, stress, living load distortion, The conclusion can be drawn that the design is up to the assignment.Key word: Program Comparison ; Three-span continuous beam bridge;Xia Sheng-type steel arch bridge ;Single tower cable-stayed double-span concrete ; the main design scheme for further analysis ; Structure analysis and checking computation目录目录 1第一章 前 言 2第二章 基本设计资料及技术指标 32.1...
