摘要：随着中国各地高铁的建设，中国高铁正在引领世界高铁发展，高铁也为我国经济建设作出了巨大贡献。而桥梁作为高速铁路大家庭中不可或缺的一份子，在交通运输中的作用无与伦比。目前最常见的一种桥梁的形式就是连续梁桥，它的优点是：受到荷载作用时形变非常小，却拥有相当大的刚度，抗震能力也非常出色，拥有如此出色的表现养护起来却相当简单。

这次设计内容是为高速铁路三跨连续梁桥设计。孔径布置为35m+55m+35m，全长125米。跨区间无缝钢轨是大多数高铁采用的形式 , 因此桥梁的纵向位移在本次设计中相当重要。也就是说此高铁桥梁必须要有足够的纵向刚度 ,不能在受到荷载作用的时候产生过大的纵向位移。71919

本设计的建模利用了Midas软件进行建模。Midas软件作为桥梁领域通用的设计与分析系统，不仅操作界面非常直观，而且充分利用了计算机尖端的显示技术。它具有建模并进行一系列分析的强大功能。

毕业论文关键词： 高铁；连续梁桥；预应力混凝土；无缝钢轨

Design of 35m + 55m + 35m Continuous Beam Bridge on High - speed Railway

Abstract：With the construction of high-speed railways across China, China's high-speed rail is leading the development of the world's high-speed rail, high-speed rail has also made great contributions to economic construction。 The bridge as an indispensable part of the high-speed railway family, in the role of transport unparalleled。 Continuous beam bridge is the most common form of bridge, its advantages are: by the load when the deformation is very small, but has a considerable stiffness, seismic capacity is also very good, with such a good performance conservation is quite simple。

    This design is designed for high-speed rail three-span continuous beam bridge design。 The aperture is arranged at 35m + 55m + 35m with a total length of 125 meters。 High-speed railway is a cross-section seamless rail, so the vertical displacement of the bridge is a strict design requirements of the focus。 In other words, this high-speed rail bridge should have enough longitudinal stiffness, will not be subjected to the load when the role of excessive vertical displacement。

    The design of the model using Midas software to model。 Midas software as a bridge field common design and analysis system, not only the user interface is very intuitive, and make full use of the computer cutting-edge display technology。 It has the power to model and perform a series of analyzes。

Key words: high - speed railway；continuous beam bridge；prestressed concrete；seamless rails

目 录

1 绪论 3

1。1 预应力混凝土连续梁桥简述 3

1。2 连续梁桥孔跨布置 3

1。3 连续梁桥截面形式 3

1。4 悬臂浇筑施工介绍 4

2 梁桥总体布置及构造 5

2。1 桥梁设计资料 5

2。1。1 主要技术指标 5

2。1。2 材料规格 5

2。1。3 设计荷载 5

2。1。4 结构构造 6

2。2主梁结构设计 6

2。2。1 主梁高度拟定 6