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。浙江五里浦大桥设计为6x35m小箱梁桥，上部结构为35m小箱梁,先简支后连续，下部结构为桩柱式基础墩台，采用预制拼装法施工方案。69804

上部构造的计算拟定箱梁截面，对35米跨径进行了很详细的单元划分，计算恒载内力和活载内力，全桥均采用MIDAS软件进行了计算，全部设计图纸由AutoCAD绘制，计算机编档、排版，打印出图及论文。此外，还翻译了一篇英文文献“ Rehabilitation of RC inverted-T girders using anchored CFRP sheets    ”

毕业论文关键词: 预应力混凝土连续梁桥   箱梁

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. Zhejiang Wulipu bridge design 6x35m small box girder bridge, the upper structure for 35m box girder, first simply supported then continuous, lower part structure for pile column pier foundation.

     The calculation of the superstructure is carried out with a supposed section of the box beam, unit pision is done in detail on the 35m span to calculate the internal force of live loads and dead loads. The MIDAS has been applied during the calculation of the prestressing steel and the force, and the prestressing loss has been calculated referred to the new standards.

Key words: Prestressed Concrete Continuous Beam Bridge box girder 

目录

1.绪论 - 1 -

1.1 预应力混凝土连续箱梁桥概述 - 1 -

1.2毕业设计的目的与意义 - 2 -

2.设计资料 - 2 -

2.1 桥梁概况，设计参数，技术必要条件 - 2 -

2.2 设计要求、原则、规范标准 - 3 -

3.桥跨总体布置及结构尺寸拟定 - 3 -

    3.1 材料 - 3 -

3.1.1 混凝土 - 4 -

3.1.2预应力材料 - 4 -

3.1.3普通钢筋 - 4 -

    3.2 结构尺寸,桥孔分跨