1、 1 赤山赤山大桥设计大桥设计 摘要摘要 赤山大桥为跨越沅江的一座大跨径连续刚构桥，跨径布置为（70+120+70）m，主梁截 面呈二次抛物线变化，桥墩为双薄壁墩，采用悬臂浇注施工。这次毕业设计是对我四年所 学专业知识的一次检阅，是对我的动手操作能力、信息搜集能力、文字表达能力等都是一 次不小的锻炼。通过此次毕业设计，使我深刻地认识到作为一名桥梁设计工作者，不仅要 有严谨的工作态度，还要具有扎实的专业基础知识、全面的专业知识以及计算机软件应用、 查阅资料等方面的知识。 本文主要介绍了赤山大桥上部结构设计，包括主桥形式选择，上部结构尺寸拟订，恒 载和活载内力计算，影响线计算，次内力计算，内力组合
2、，预应力钢束设计及预应力损失 计算，以及强度验算、应力和变形验算，运用了先进的理论技术、材料、工艺来解决设计 和施工中存在的实际问题。 关键词：双薄壁墩 连续刚构桥 内力 应力损失 变形 2 The Superstructure Design of The Chi Shan Bridge Abstract The Chi Shan Bridge which is designed as (70+120+70) m with quadratic parabola main girder and double thin-wall piers is a large-span prestressed
3、concrete bridges with continuous rigid frame crossing Yuan shui river and the main construction technology is cantilever. The design project for graduation reviews my knowledge which I have learnt in the last four years and strengthens the abilities of my operating、collecting message and expressing
4、my thought. After this design ,I recognize that as one bridge desiger I must have strict attitude and have the sturdy speciallzed basic knowledge、the comprehensive speciallzed knowledge and the knowledge of applying the computer software and looking up material . This paper introduced main problems in superstructure designing, including the selection of main bridge style, superstructure design, the calculation of internal force、influence lines、 sub-internal force and load combination, setting
