论文总字数：47423字

摘 要

随着社会的不断进步，技术在不断的发展，社会对交通领域的需求和要求逐渐增加，其中桥梁作为交通运输之中不可忽视的一环，社会上对桥梁的要求也不断增加。本次毕业设计的题目是台玻路互通C匝道桥设计。此次毕业设计的主要内容是对C匝道桥上部结构的设计验算，主要内容包括承载能力极限状态验算和正常使用极限状态验算。

台玻路互通C匝道桥全宽8.5m，桥梁布跨为2x19m，桥梁上部结构采用普通钢筋混凝土连续箱梁结构，满堂支架施工是这次施工的主要方法。钢筋混凝土现浇箱梁桥采用支架现浇施工的施工方法，它能够很好的适用小半径曲线中，一般跨径小于20m特别是在互通匝道上，运用广泛。本文以现浇箱梁桥—台玻路互通C匝道桥为例，通过对此的设计计算过程为研究对象，结合所学知识，通过桥梁博士建模电算，进行桥梁上部结构计算。

关键词：普通钢筋混凝土连续箱梁；满堂支架施工；桥梁上部结构

Design of C ramp bridge for platform glass road interchange

Abstract

With the continuous progress of the society and the continuous development of technology, the demand and requirements of the society in the field of transportation are gradually increasing. As a link that can not be ignored in transportation, the demand of the society on the bridge is also increasing. The topic of this graduation project is the design of C ramp bridge of Taibo Road Interchange. The main content of this graduation project is the design of C ramp bridge superstructure checking, the main content including bearing capacity limit state checking and normal use limit state checking.

The bridge on ramp C of Taibo Road Interchange has a full width of 8.5m, and the bridge span is 2x19m. The superstructure of the bridge adopts ordinary reinforced concrete continuous box girder structure, and the construction of full bracket is the main method of this construction. Reinforcement concrete cast-in-place box girder bridge using bracket cast-in-place construction construction method, it can be very good for the small radius curve, the general span is less than 20m, especially in the interchange ramp, widely used.

In this paper, cast-in-place box girder bridge - Taibo Road interchange C ramp bridge as an example, through the design and calculation process of this as the object of study, combined with the knowledge, through the bridge doctor modeling computer, the calculation of the superstructure of the bridge.

Key words: ordinary reinforced concrete continuous box girder; Full stent construction; Bridge superstructure

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目录

摘 要 ……………………………………………………………………………………………… Ⅰ

Abstract …………………………………………………………………………………………………Ⅱ

1. 绪论………………………………………………………………………………………………1
2. 设计概述…………………………………………………………………………………………2

2.1 工程概述…………………………………………………………………………………………2

2.2 设计原始资料……………………………………………………………………………………2

2.3 设计规范…………………………………………………………………………………………2

2.4 主要材料…………………………………………………………………………………………2

第三章 桥梁总体设计与布置……………………………………………………………………………3

3.1 桥梁结构设计……………………………………………………………………………………3

3.2 总体布置…………………………………………………………………………………………3

第四章 电算建模…………………………………………………………………………………………5

4.1 结构建模…………………………………………………………………………………………5

4.1.1 运用软件和项目基本信息…………………………………………………………………5

4.1.2 模型概述……………………………………………………………………………………6

4.2 钢筋设计…………………………………………………………………………………………6

4.2.1 纵筋布置……………………………………………………………………………………6

4.2.2 箍筋布置……………………………………………………………………………………7

4.3 施工分析…………………………………………………………………………………………7

4.3.1 现浇阶段……………………………………………………………………………………7

4.3.2 二期恒载……………………………………………………………………………………7

4.3.3 收缩徐变……………………………………………………………………………………7

4.4 运营分析…………………………………………………………………………………………7

第五章 持久状况承载能力极限状态……………………………………………………………………8

5.1 正截面承载力……………………………………………………………………………………8

5.1.1 最大弯矩……………………………………………………………………………………8

5.1.2 最小弯矩……………………………………………………………………………………18

5.2 斜截面承载力……………………………………………………………………………………27

5.2.1 最大剪力……………………………………………………………………………………27

5.2.2 最小剪力……………………………………………………………………………………31

第六章 持久状况正常使用极限状态…………………………………………………………………34

6.1 裂缝宽度验算……………………………………………………………………………………34

6.2 挠度验算…………………………………………………………………………………………36

6.2.1 竖向位移……………………………………………………………………………………36

第七章 短暂状况构件应力计算…………………………………………………………………………39

7.1 受压区混凝土边缘的压应算……………………………………………………………………39

7.2 受拉钢筋应力验算………………………………………………………………………………45

7.3 中心轴处的主拉应力（剪应力）验算…………………………………………………………52

致 谢…………………………………………………………………………………………………………60

参考文献（References）……………………………………………………………………………………61

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