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摘要：近年来，预应力混凝土连续刚构桥以其简单的施工，便宜的造价，合理的受力体系和舒适的行车环境这些优点在工程上得到了广泛的应用，在主跨100——300m范围内几乎成为了首选桥型。预应力混凝土连续刚构桥的应用更为普遍，不但用于直桥，还用于曲线桥；不但用于公路桥，同样适用于大跨径的铁路桥；不但用于大跨径桥梁，亦可用于中等跨径的城市高架桥。结构型式可以多样化，有单墩和双壁墩，可以配合连续梁组成连续刚构与连续梁的组合体系。从发展的趋势上看，连续刚构桥的可行跨度不仅可达350m，而且可以与预应力混凝土斜拉桥竞争。本设计即采用大跨度预应力混凝土刚构桥进行设计，用连续刚构桥在高速铁路桥梁设计软件Midas试用版，连续梁桥一二跨连续系统，可利用边跨连续梁的重量使T结构由不平等的悬臂，以加大主跨的跨径的桥梁。20808
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毕业论文关键字： 连续刚构；预应力；桥梁；有限元；Midas
The design of high-speed rail 92m + 168 m + 92m continuous steel structure bridge
Abstract：In recent years, the prestressed concrete continuous rigid frame bridge with its simple construction, low cost,reasonable force system and a comfortable drivingenvironment these advantages have been widely used in engineering, the main span of 100 -- the range of 300mhas almost become the preferred type. Application of prestressed concrete continuous rigid frame bridge is more widespread, but for the straight bridge, also used for curve bridge; not only for highway bridge, also suitable forlong span railway bridge; not only for large span bridge,also can be used for city viaduct bridge middle span.Structure can be persified, with single pier and double wall piers, can cooperate with the beam combination system composed of continuous rigid frame andcontinuous beam. From the trend, continuous rigid frame bridge is not only feasible span up to 350m, but also with the prestressed concrete cable-stayed bridge competition.The design of the long span prestressed concrete rigid frame bridge design, modeling and analysis of bridges using finite element software. Used in the design of high-speed railway bridge Midas software of bridge design, continuous rigid frame bridge is a kind of side span of continuous system, can use the weight of the side span continuous beam make T made before long cantilever structure, to increase the mainspan span Bridges.
KeyWords :continuous rigid frame;prestress; bridge;finite element;Midas
目录
1 绪论 1
1.1 课题的目的和意义 1
1.2 桥梁分类及刚构桥的分类及概念 1
1.2.1 桥梁分类 1
1.2.2 刚构桥的分类 4
1.3 连续刚构桥的应用和优缺点 4
1.4 国内外研究现状与水平 5
1.5 发展趋势 6
1.6 Midas软件 6
1.7课题主要研究内容 6
2 总体布置及结构主要尺寸的拟定 8
2.1 主要技术指标 8
2.2 材料规格 8
2.3 设计荷载 8
2.3.1 恒载 8
2.3.2 活载 9
2.3.3 附加力 9
2.3.4 特殊荷载 9
2.3.5 荷载组合 9
2.4 结构构造 9
2.5小结 10
3 恒活载作用下主梁内力 11
3.1 恒载内力计算 11
3.1.1 结构自重 11
3.1.2 二期恒载 14
3.2 活载内力计算 19
3.3主梁次内力 22
3.3.1整体升温和整体降温 22
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