摘要：本设计严格依据任务书与相应规范进行，其桥型主要适用于城市高架梁桥。设计要求的区段沿线地貌单一，地形平坦。此次设计的桥型方案为简支箱梁梁。其跨径为 30 米，桥宽为8.1m。本桥所采取的平面线形为直线，桥面横坡为2.0%。57198
根据所给资料，一共拟定了三个不同的桥型方案，方案一为预应力连续T梁桥、方案二为大跨度拱桥，方案三是预应力简支箱梁桥。
通过方案比选，最终选择的方案为预应力简支箱梁桥为推荐方案，该桥由单片梁构成，单跨为30米。主梁内力计算则采用了软件电算与手算结合的方式，用以相互校核。最终使用的主要是电算程序计算的结果。完成内力组合之后，根据构造要求，进行了预应力钢筋的需求计算，再具体进行配置。而在最后对于截面各种强度的验算，均选取了应力较大的特殊截面进行计算。
在设计过程中，计算机软件的应用使计算过程更加简便，同时提高了对Midas、Autocad等软件的熟练程度。
毕业论文关键词：上部结构； 预应力；内力；截面强度；内力组合
Design of South bridge extension of Shanghai Metro Line 5 elevated bridge
Abstract： This bridge is applicable to the main standard of city viaduct bridge. The proposed site is a single, relatively flat terrain. This design is made up of 1 span simply supported girder span 30 meters,and the wide is 8.1m. A straight horizontal alignment of the bridge, deck cross slope of 2.0%.
According to the data developed，I designed three programs:T concrete
continuous beam bridge, large span arch bridge, and concrete box girder bridge.Concrete continuous beam bridge is the recommended program.
Through the program of program selection, program three : concrete box girder bridge is the best program, its aperture arrangement is 30m and Main beam internal forces calculated.Using computer calculation combined with the hand count to check each other. Using computer calculation to get the final results. Combing of internal forces is completed, the tendon was estimated and configuration. Recommended steel beam in accordance with the uniform, scattered and arranged to consider the principles of anchorage in the size of the upper and lower plate and the web. After completion of five prestress loss calculation, the composition and the effective prestress, prestress loss calculation, calculation and checking the section strength and the limit state checking a special section just take the time to calculate.
In the course of design,computer software application makes the calculation process easier while increasing the proficiency of Midas, Autocad and other software.
[Key word] : Superstructure; prestressed; Internal Force; Section strength； Internal Force combination
目录
1 绪论 ... 1
1.1 设计的目的与要求 . 1
1.1.1 目的 1
1.1.2 要求 1
1.3 箱形梁桥的特点 ..... 2
2 桥梁结构方案评选.... 3
2.1 设计资料 ..... 3
2.1.1 设计题目 .. 3
2.1.2 工程概况 .. 3
2.1.3 设计标准 .. 3
2.2 方案拟定 ..... 3
2.2.1 构思宗旨 .. 3
2.2.2 比选标准 .. 3
2.3方案比选 4
2.4方案选择 . 7
3 推荐方案简介及结构尺寸拟定 7
3.1 推荐方案简介 ... 7
3.2 结构尺寸拟定 ... 7
3.2.1 箱梁截面尺寸拟定 .... 7
3.2.2桥梁主要材料选用 .... 8
4 主梁内力计算.... 10
4.1 主梁单元划分 ..10 上海轨道交通南桥延伸段高架桥梁设计+CAD图纸:http://www.751com.cn/gongcheng/lunwen_61795.html