## 某预应力连续刚构桥设计

Title  Design of a prestressed concrete continuous rigid frame bridge
Abstract
The main span of the prestressed concrete continuous rigid frame bridge is 120 meters is designed in This articl.Firstly bridge site, waterways situation,Determining the applicable bridge.Reference existing bridge design examples, design three options, and comparison.Then according to the technical requirements and specification, all aspects of the program were compared, and ultimately select the most appropriate program.Then use AutoCAD in program size and structure of the design, the use of Dr. bridges modeling, internal force calculation, structural steel design, as well as checking cross-section.And then improveing the scheme, make it security, stability, etc..
Keywords  Prestress  Continuous rigid frame bridge  Alternatives  Structure design

1  绪论    1
1.1  预应力混凝土连续刚构桥综述    1
1.2  设计说明    1

1.3  毕业设计的目的与意义    4
2  方案比选    5
2.1  总体设计原则    5
2.2  推选方案比较    5
2.3  方案比选结果    11
3  桥梁上部结构设计    13
3.1  设计基本资料    13
3.2 设计要点及结构尺寸拟定    14
3.3  毛截面几何特性    15
3.4  关键输入数据说明    16
3.5  结构离散与计算图示    18
3.6  施工阶段描述    20
3.7  施工阶段内力图    21
4  结构内力计算及主梁预应力钢束布置    27
4.1 特殊截面影响线    27
4.2  活载内力计算    38
4.3  次内力计算    40
4.4  内力组合    43
4.5  恒载内力计算    47
5  主梁预应力钢束布置及其估算    48
5.1  预应力钢束估算    48
5.2  钢束的布置    49
6  结构内力验算    65
6.1  持久状态承载能力极限状态验算    65
6.2  持久状况正常使用极限应力验算    69

1.1  预应力混凝土连续刚构桥综述

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