高速铁路45m+70m+45m连续刚构桥设计+CAD图纸
毕业论文关键词：高速铁路；连续刚构桥；结构分析；过程验算
The design of a high-speed railway continuous rigid bridge with the main spans of (45+70+45)m
Abstract: Since the 1990s, China's high-speed railway has made considerable progress,made a significant contribution to economic development. As an important part of high-speed railway, bridge plays an irreplaceable role in the rail transport. Continuous girder bridge is a common bridge structure，pre-stressed concrete continuous girder bridge is its main structure form, it has advantages of fewer seams, high beam can be reduced, saving material and stiffness, good integrity, high overload capacity, safety degree, large deck joints, driving comfort, etc. The design basis requirements of the mission statement, using cross-section in the form of single-chamber single box, designed by midas software. According to the size of the bridge intended to establish the basic model of the bridge, and then the internal force analysis, calculation results of reinforcement, conducted a cross-sectional checking. This paper describes the 70m +120 m +70 m-sectional dimensions of the proposed continuous girder bridge design, bridge model, the applied load, and bridge reinforcement section section of the process of checking, etc., through the analysis of checking design calculations show that the method is correct, rational distribution of internal forces, in line with requirements of the design task.
Keywords: high-speed railway; continuous girder bridge; structural analysis; checking process
目录
1 绪论 1
1.1高速铁路连续刚构桥的发展和特点 1
1.1.1 中国高铁现状 1
1.1.2 连续刚构桥的特点 1
1.2 预应力混凝土连续梁桥 2
1.2.1连续刚构桥的适用范围 2
1.2.2 预应力混凝土结构特点 2
1.3 施工方案 3
1.4 Midas简介 4
1.5 本设计主要内容 4
2 桥跨整体设计和细部尺寸拟定 5
2.1 设计基本资料 5
2.1.1 主要技术指标 5
2.1.2 材料规格 5
2.1.3 设计恒载 5
2.1.4 结构构造 6
2.1.5 设计依据 6
2.2 主梁结构设计 6
2.3 小结 9
3 荷载内力计算 10
3.1 单元划分 10
3.2 主梁内力计算 12
3.2.1 荷载内力计算 12
3.2.2 效应作用组合 17
3.3 小结 18
4 预应力筋的设计与布置 19
4.1 钢束估算 19
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