装配式钢桁—砼组合连续刚构桥概念设计

发布时间：2018-06-17 05:43

本文选题：装配式 + 钢-混凝土组合　；参考：《重庆交通大学》2014年硕士论文

【摘要】：针对现有连续刚构桥梁存在混凝土开裂、后期挠度过大及跨越能力有限等问题，导师周志祥教授提出了装配式钢桁-混凝土组合连续刚构桥的构想。本文依托导师主持的交通部重点应用基础研究项目“特大跨钢桁混凝土组合连续刚构关键技术研究”，在总结前期研究成果的基础上，对钢桁-混凝土组合连续刚构桥的概念设计方法、估算方法以及快速计算方法开展了研究，主要内容及结论如下： ①研究了装配式钢桁-混凝土组合连续刚构桥的概念设计方法，，分析了装配式钢桁-混凝土连续刚构桥的关键参数取值、构造特点以及施工方法； ②提出了弯矩释放系数的概念，基于弯矩释放系数建立了钢桁-混凝土组合连续刚构的估算方法，通过算例将估算方法和有限元进行了对比，表明估算方法较为可行； ③基于ANSYS-APDL平台开发了装配式钢桁-混凝土组合连续刚构桥专用参数化有限元计算程序，通过与专业软件MIDAS进行对比，证明了专用参数化程序计算结果可靠，利用专用参数化程序进行了单因素参数分析，得出了装配式钢桁-混凝土组合连续刚构桥的关键设计参数建议取值范围； ④采用本文建立的概念设计方法、估算方法以及参数化有限元程序，对榕江特大桥进行了概念设计，给出了推荐方案。
[Abstract]:Aiming at the problems of concrete cracking in existing continuous rigid frame bridges, excessive deflection in the later stage and limited span capacity, Professor Zhou Zhixiang, a tutor, put forward the idea of prefabricated steel truss concrete composite continuous rigid frame bridge. This paper relies on the key applied basic research project of the Ministry of Communications, "Research on the key Technology of continuous rigid frame of Super large Span Steel Truss concrete combination", based on the summary of the previous research results. The conceptual design method, estimation method and fast calculation method of steel truss concrete composite continuous rigid frame bridge are studied. The main contents and conclusions are as follows: 1 the conceptual design method of prefabricated steel truss concrete composite continuous rigid frame bridge is studied, and the key parameters of assembly steel truss concrete continuous rigid frame bridge are analyzed. The concept of moment release coefficient is put forward and the estimation method of steel truss concrete composite continuous rigid frame is established based on moment release coefficient. The comparison between the estimation method and the finite element method shows that the estimation method is feasible. 3. Based on ANSYS-APDL platform, the special parametric finite element calculation program for the fabricated steel truss concrete composite continuous rigid frame bridge is developed. By comparing with the special software Midas, it is proved that the calculation result of the special parameterized program is reliable, and the single factor parameter analysis is carried out by using the special parameterized program. The suggested range of key design parameters for the fabricated steel truss concrete composite continuous rigid frame bridge is obtained. 4. The conceptual design method, estimation method and parameterized finite element program are used. The concept design of Rong River Bridge is carried out, and the recommended scheme is given.
【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】：U448.23

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