摘要：桥梁是公路、铁路和城市轨道交通的重要组成部分，公路桥梁的发展与我国的经济发展紧密相连。新中国成立以来，无论是设计概念还是在制造工艺及建造技术上，我国公路桥梁都取得了较大的成就。是常用的桥梁结构之一就是连续桥梁，桥梁的主要结构形式之一是预应力混凝土连续梁桥，它具有变形小、伸缩缝少、结构刚度好、养护方便、抗震能力强等优势。根据任务书的要求，本次设计要求选用的是单箱单室截面形式，利用Midas Civil有限元分析软件将桥梁进行设计。本文具体介绍了35m+55m+35m连续梁桥设计的截面尺寸拟定、桥梁模型的建立、单元划分、荷载施加、截面配筋和桥梁截面的验算过程，经经过分析验算后，证明该设计合理，符合要求。68695

毕业论文关键词：连续梁桥；结构设计；预应力混凝土。

The design of three span continuous bridge design of 35m+55m+35m

Abstract: The bridge is an important part of highway, railway and urban rail transit, and the development of highway bridge is closely related to China's economic development. Since the founding of the People's Republic of China, both the design concept and the manufacturing technology and the construction technology, our country highway Bridges have achieved great achievements. Is a common bridge structure is one of continuous bridge, bridge is one of the main structure form about pre-stressed concrete continuous bridge, it has a little deformation, expansion joints, good stiffness, less maintenance convenience, the advantages of the anti-seismic ability. According to the book's requirements, the design requires the design of the bridge to use the Midas civil fem software.This article detailed introduces the 35 m + 55 m + 35 m continuous girder bridge design the section size of drafting, the bridge model,cell pision, load, such as the sectional reinforcement and bridge calculation process, through analysis of the calculation show that the design calculation method is reasonable, accord with the requirement of design task.

Keywords: Continuous girder bridge; Structure design; Pre-stressed concrete.

目录

第1章 绪论 1

1.1概述 1

1.2 预应力混凝土连续桥梁 1

1.3 施工工艺 2

1.4 Midas 软件介绍 2

1.5 本设计研究内容 3

第2章 桥跨总体布置及结构主要尺寸 4

2.1 桥跨总体布置 4

2.1.1 设计基本资料 4

2.1.2 主要技术指标 4

2.1.3 材料规格 4

伸缩缝：采用RG—40型伸缩缝，设置于桥面上 5

2.1.4 设计要点 5

2.1.5 计算参数 5

2.1.6 设计依据 6

2.2 结构尺寸的拟定 6

2.2.1截面尺寸拟定。 6

2.3 小结 7

第3章 荷载内力计算 8

3.1 单元划分 8

3.2 主梁内力计算 10

3.2.1 荷载内力计算 10

3.2.2 效应组合