波形钢腹板混凝土拱桥施工阶段力学特性研究

发布时间：2018-01-07 18:20

本文关键词：波形钢腹板混凝土拱桥施工阶段力学特性研究　出处：《重庆交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：钢筋混凝土拱桥具有造价低、外形美观、承载力强、抗震性能好和易维护等优点,在桥梁工程中应用广泛。然而拱桥要向更大跨径发展,自重大和施工困难是影响其发展的两个关键问题。波形钢腹板混凝土拱桥,利用波形钢板来代替传统钢筋混凝土拱箱中的腹板,可达到减轻自重和省去浇筑腹板混凝土模板的目的。采用挂篮悬臂浇筑法建造拱桥,则具有结构整体性好、受力均匀、后期维护少、耐久性好等优点。本文依托贵州省交通运输厅的科技项目(2011-122-034)“悬浇钢筋混凝土箱型拱桥设计与施工技术研究”,以课题组完成的波形钢腹板混凝土拱桥为研究对象,围绕施工阶段受力分析,开展以下研究工作： ①针对试设计中采用等效正交异性直腹板来模拟波形钢腹板褶皱效应进行对比分析。采用与贵州木蓬特大桥相同的悬臂浇筑斜拉扣挂施工方法,利用Midas/Civil有限元分析软件模拟施工过程,对施工索力、拱圈位移以及混凝土顶底板主拉应力和腹板Mises应力进行计算。 ②开展了波形钢腹板混凝土拱桥各施工阶段在恒载及横向风荷载作用下的线弹性屈曲分析；针对最大悬臂施工状态和拱圈合龙施工状态进行几何非线性稳定分析。 ③通过对节段自重、扣索锚固位置、扣索张拉误差、混凝土收缩徐变以及拉索刚度等进行参数化分析,得出这些因素对悬臂浇筑波形钢腹板混凝土拱桥施工过程的影响程度。为波形钢腹板混凝土拱桥施工提供理论依据。
[Abstract]:Reinforced concrete arch bridge has the advantages of low cost, beautiful appearance, strong bearing capacity, good anti-seismic performance and has the advantages of easy maintenance, is widely used in bridge engineering. However, to the development of arch bridge with larger span, heavy weight and difficult construction are two key issues affecting the development of the corrugated steel web plate. Concrete arch bridge, using corrugated steel plate to replace the traditional reinforced concrete box arch in the web, so as to reduce weight and save pouring concrete web template. The hanging basket cantilever pouring construction of arch bridge, it has a good overall structure, uniform stress, system maintenance, durability and good. This paper relies on the science and technology project of Guizhou Provincial Department of transportation the (2011-122-034) "cantilever reinforced concrete box arch bridge design and construction technology of concrete arch bridge with corrugated steel webs, completed by the research group as the research object, focusing on the construction stage stress analysis, open The following research work:
According to the test design using equivalent orthotropic straight webs to simulate the effect of corrugated steel webs folds were analyzed. Using the same bridge and Guizhou Mu Peng super large cantilever cable-stayed construction method, construction process simulation using Midas/Civil finite element analysis software, the construction of cable force, displacement of arch and concrete roof and floor should be the main pull force and web Mises were calculated.
Secondly, the linear elastic buckling analysis of the concrete filled steel arch bridge with corrugated steel webs during the construction stage under the condition of dead load and transverse wind load is carried out. The geometric nonlinear stability analysis is carried out for the maximum cantilever construction state and the closing condition of the arch ring.
Through the weight of section, cable anchor position, cable tension error, parametric analysis of creep and shrinkage of concrete and the cable stiffness, that these factors on the cantilever construction process of concrete arch bridge with corrugated steel webs of the impact. To provide a theoretical basis for the construction of concrete arch bridge with steel webs waveform.

【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4

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