简支变连续梁桥橡胶支座更换技术研究

发布时间：2018-03-16 12:22

本文选题：简支变连续梁桥　切入点：整体同步顶升　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着桥梁结构的退化,桥梁维修加固已成为当前公路桥梁发展的重点。简支变连续梁桥因其结构受力简单已成为我国高速公路上的一种主要桥型,但是随着橡胶支座的损伤失效,该类桥梁普遍面临着支座更换的问题。本文在总结分析该类桥梁支座更换施工方案和工艺的基础上,通过对实际工程进行应用研究,为保障该类工程施工安全和成本控制提供经验和指导。论文的具体研究内容如下:(1)从施工方案和工艺两方面,分析了国内外支座更换施工现状和存在的问题,总结了多种连续梁桥支座更换方法的适用范围和技术关键。(2)从工程实例出发,对整体同步顶升施工方案进行可行性研究。通过仿真分析,为一连续T梁桥设计了钢蝴蝶梁法更换支座施工方法,系统总结了具体可行的顶升施工方案。(3)对采用单支座布置形式的T梁及小箱梁两种桥型进行施工过程仿真模拟。分析了纵向逐墩或多墩、横向同步顶升更换支座过程中主梁应力、位移及支反力的变化规律,验证了纵向逐墩、横向同步顶升工况下主梁的安全性,得到了使桥梁顶升过程中各截面的受力优化的纵向多墩、横向同步顶升方案。
[Abstract]:With the degradation of bridge structure, bridge maintenance and reinforcement has become the focus of highway bridge development. However, with the damage and failure of rubber bearings, this kind of bridge is generally faced with the problem of replacement of bearings. On the basis of summing up and analyzing the construction plan and technology of replacement of the bearings of this kind of bridges, this paper studies the application of practical engineering. In order to provide experience and guidance for ensuring construction safety and cost control of this kind of projects, the concrete research contents of this paper are as follows: 1) from the two aspects of construction scheme and technology, the present situation and existing problems of replacement construction of supports at home and abroad are analyzed. This paper summarizes the scope of application and key technology of replacement of bearing of continuous girder bridge. Based on the engineering example, the feasibility study of the whole synchronous lifting construction scheme is carried out, and the simulation analysis is carried out. For a continuous T-beam bridge, the construction method of replacing bearing with steel butterfly beam method is designed. This paper summarizes the concrete and feasible scheme of lifting construction. It simulates the construction process of T-beam and small box girder with single support arrangement, and analyzes the longitudinal pier-by-pier or multi-pier. The changes of the stress, displacement and support reaction force of the main beam in the process of the lateral synchronous lifting and replacement of the support verify the safety of the main beam under the longitudinal pier-by-pier and the transverse synchronous lifting. The longitudinal multi-pier and transverse synchronous lifting scheme are obtained to optimize the force of each section in the process of bridge uplift.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.7

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