结合梁斜拉桥设计中的几个关键问题研究

发布时间：2018-01-06 06:35

本文关键词：结合梁斜拉桥设计中的几个关键问题研究　出处：《西南交通大学》2014年硕士论文　论文类型：学位论文

更多相关文章： 内力分配 有效宽度 稳定性 锚拉板

【摘要】：论文主要是针对重庆江津观音岩长江大桥设计中遇到的关键问题,结合科研项目《大跨度宽桥面结合梁斜拉桥设计、施工关键技术研究》相关成果,总结归纳提炼出大跨度宽桥面结合梁斜拉桥设计中几个关键问题的解决方法。论文首先论述了结合梁斜拉桥设计中的结构计算方法,采用简单实用的前进分析法建立了全桥施工计算模型,摸清了结合梁斜拉桥的总体受力特性,再通过有限元模型对不同荷载作用下的结合梁钢-混凝土内力分配情况进行分析,总结了主动调整结合梁内力分配的有效措施。其次讨论了目前设计规范采用的有效宽度计算方法,指出了该方法在应用中的不足,结合有限元分析结论,提出了便于使用的简易结合梁斜拉桥有效宽度确定方法。通过实桥计算实例对结合梁的稳定性进行分析,并找出了主梁失稳模态与M/N内力状态的相互关系。通过实桥锚拉板计算实例对结合梁的锚拉板的受力行为进行了分析,并介绍江津长江大桥锚拉板动静载模型试验的结果。
[Abstract]:This paper is mainly aimed at the key problems of Chongqing Jiangjin Guanyinyan Yangtze River bridge in the design, combined with the research project "large span wide deck composite girder cable-stayed bridge design and Research on the key technologies of construction > related results, summarized the extracted solution of large span wide deck girder cable-stayed bridge with the key issues in the design. The paper first discusses several the combination of structure design of cable-stayed bridge in the calculation method, using a simple and practical forward analysis method to establish the calculation model of the construction of the bridge, to find out the composite girder cable-stayed bridge overall stress characteristics, and then through the finite element model of different loads with steel and concrete beam internal force distribution is analyzed. Summarizes the combination of effective measures to take the initiative to adjust the internal force of the beam distribution. Secondly, the calculation method of effective width of the current design specification is adopted, the problem in the application of the combination. The finite element analysis results, put forward a simple combination method to determine the effective width of cable-stayed bridge is easy to use. Examples of the analysis of the stability of beam through the calculation of the real bridge, and find out the relationship between the instability mode and M/N internal force state. Calculation examples of mechanical behavior of composite beams of tensile anchor plate through the analysis of the real bridge anchor plate, and the Jiangjin Yangtze River bridge tensile anchor plate static load model test results.

【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27

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