高速公路中先简支后连续T型梁桥空间受力分析

发布时间：2018-03-13 10:32

本文选题：简支变连续　切入点：T型梁　出处：《重庆交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：先简支后连续T型梁桥在高速公路中广泛应用，施工简便、经济效应好得到了人们的认可。在其空间受力的分析还较为缺乏，先简支后连续体系计算还没有相应的统一规范。本文以成渝复线上先简支后连续T型梁桥（跳墩河中桥、小重庆大桥、刘家湾大桥）为工程背景，分析在一定桥面宽度不同跨径桥梁在空间受力分析规律。本论主要研究内容及方法：本文针对当今高速公路对行车质量的要求提高以及桥梁设计和建设的快速发展，提出了在工程中先简支后连续梁桥运用的重要性，，简述了国内外此类桥梁发展历程以及发展现状，叙述了此类桥梁结构的优缺点。对目前分析荷载横向分布系数的方法归纳总结，运用适合本文研究桥梁的方法计算不同跨径T梁桥跨中的荷载横向分布系数。建立简支变连续T型梁桥的有限元模型，计算在荷载作用下各片梁的横向分布系数。利用实测数据，与传统理论方法、模型计算的横向分布系数进行对比分析。
[Abstract]:Simply supported and then continuous T-beam bridges are widely used in expressway, which is easy to construct and has good economic effect. There is no corresponding unified specification for the calculation of simple support and then continuous system. In this paper, the engineering background is simply supported and then continuous T-beam bridge (middle bridge of Xiudun River, small Chongqing Bridge, Liujiawan Bridge) on Chengdu-Chongqing double Line. This paper analyzes the law of spatial stress analysis of bridges with different spans at a certain deck width. The main contents and methods of this study are as follows:. In view of the improvement of highway quality and the rapid development of bridge design and construction, this paper puts forward the importance of using simple support and then continuous beam bridge in engineering. The development history and present situation of this kind of bridge at home and abroad are briefly described, and the advantages and disadvantages of this kind of bridge structure are described. In this paper, the method of analyzing the transverse distribution coefficient of load is summarized, and the load transverse distribution coefficient of T-beam bridge with different span is calculated by using the method suitable for the study of bridge in this paper. The finite element model of simply supported variable continuous T-beam bridge is established, and the transverse distribution coefficient of each beam under load is calculated. By using the measured data, the transverse distribution coefficient calculated by the model is compared with the traditional theoretical method.
【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】：U448.21;U441

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