摘要本设计是根据毕业设计任务书要求和设计规范的规定，参照已建桥梁设计方案确定桥梁型式和结构形式，主要分析了桥梁在各种荷载作用下的效应。预应力混凝土连续梁桥因其结构受力性能好、变形小等优点成为最富有竞争力的主要桥型之一。本着“安全、经济、美观、实用”八字原则。箱形截面由于具有良好的结构性能，因而在现代各种桥梁中得到广泛的应用。箱形截面的承重结构与传力结构相结合，使各个部件共同受力，同时截面效率高，并适合预应力混凝土结构空间布束，达到较好的效果。79850

毕业论文关键词: 预应力混凝土连续梁桥

 Abstract  According to the requirements and the standards of the design assignment, the graduate design is mainly about the design of superstructure of short-span pre-stressed concrete continuous box Girder Bridge 。 Pre-stressed concrete continuous Girder Bridge become one of main bridge types of the most full of competion ability because of subjecting to the dint function with the structure good, having the small defomation, few of control joint,going smoothly comfort,protected the amout of engineering small and having the powerfully ability of earthquake proof and so on。 And on the basis of the four principles of “safety, economy, aesthetics and utility”。 Due to its excellent structural performance, the box section is widely used in modern bridges。 The load bearing structure of the box section is combined with the force transmitting structure, so that each component can be combined together, which has high efficiency, and is suitable for the space distribution of the prestressed concrete structure to achieve good results。

目 录 

1 绪论 2

1。1 预应力混凝土连续梁桥概述 2

2 工程建设条件及标准设计标准 2

2。1 计依据 2

2。2 设计技术标准 2

2。3 材料规格 3

2。4 设计参数 4

3 设计要点及结构尺寸 4

3。1 设计要点 4

3。2 结构尺寸 5

3。3 横截面沿跨长的变化 6

3。4 横隔梁的设置 6

3。5 上部结构施工 6

4 上部结构计算 7

4。1 结构自重作用效应计算 7

4。2 汽车荷载作用效应计算 9

4。3 温差应力及基础沉降内力计算 11

5 内力组合 13

6 预应力钢束计算及布置 27

6。1 钢束数量估算