铁路道碴桥面简支钢桁梁桥设计方法研究
发布时间：2018-08-27 15:26
【摘要】：随着我国高速列车的开行,以及人们生活水平的不断提高,减小列车通过桥梁时的振动以及噪声对环境造成的污染,提高乘车舒适性,简支钢桁梁桥采用道碴桥面成为发展趋势。但由于道碴桥面简支钢桁梁修建不多,且在设计方面尚存在许多技术问题需要研究解决。针对铁路道碴桥面简支梁的结构和受力特点,开展铁路道碴桥面简支钢桁梁的设计研究,先研究其简化算法、空间结构分析方法、疲劳计算理论和车-线-桥系统耦合作用等基本理论,研究了铁路道碴桥面简支梁桥结构设计方法。以广西沿海铁路黎塘至钦州段扩能改造工程沙坪河大桥1-64m道碴桥面简支钢桁梁为依托工程,研究了道碴桥面钢桁梁主桁净空尺寸、主要构件尺寸、主桁几何图式、结构杆件材料、连接方式及桥面板设计,然后建立结构计算模型,主要考虑设计荷载及组合,计算了各杆件的内力、验算了高强螺栓连接、结构稳定性计算和结构疲劳验算。通过研究工作取得以下成果及结论：(1)建立平面桁架结构计算模型和空间梁单元结构计算模型,分别进行钢桁梁结构内力计算并进行了结果比较,发现二种计算方法间,不同杆件的误差离散性较大。除端斜杆略小外,其余杆件采用平面桁架结构计算模型计算出的轴力均比按空间梁单元结构计算模型所得出的结果大,采用平面桁架结构计算模型计算结果进行杆件相关验算是偏于安全的。(2)总结出了疲劳验算设计荷载组合方法,进而进行杆件疲劳验算的方法和过程。(3)完成了广西沿海铁路黎塘至钦州段扩能改造工程沙坪河大桥1-64m道碴桥面简支钢桁梁主跨工程施工图设计。(4)总结出铁路道碴桥面简支钢桁梁桥设计的方法与步骤。
[Abstract]:With the running of high-speed train and the improvement of people's living standard, the environment pollution caused by the vibration and noise when the train passes through the bridge is reduced, and the ride comfort is improved. The adoption of ballast deck in simply supported steel truss bridges has become a trend of development. However, there are not many steel truss beams on the ballast deck, and there are still many technical problems to be solved in the design. In view of the structure and stress characteristics of simply supported girder on railway ballast deck, the design of simply supported steel truss beam on railway ballast deck is carried out. The simplified algorithm and the analysis method of spatial structure are studied first. Based on the fatigue calculation theory and the coupling theory of vehicle-line-bridge system, the structural design method of simply supported girder bridge on railway ballast deck is studied. Based on the construction of simply supported steel truss beam on 1-64m ballast deck of Shaping River Bridge, the dimensions of main truss clearance space, main component size and main truss geometry diagram of steel truss girder on ballast deck are studied. The structural material, connection mode and bridge deck are designed, and then the structural calculation model is established, which mainly considers the design load and combination, calculates the internal force of each member, checks and calculates the high strength bolt connection, the structural stability calculation and the structural fatigue checking calculation. The results and conclusions are as follows: (1) the calculation model of plane truss structure and space beam element structure are established, the internal forces of steel truss structure are calculated and compared with the results, and it is found that there are two calculation methods between them. The error dispersion of different members is larger. The axial forces calculated by the plane truss structure model are larger than those obtained from the spatial beam element structure model except for the slightly small end inclined bar. It is safe to use the calculation results of plane truss structure model to calculate the member correlation. (2) the design load combination method of fatigue checking calculation is summarized. Furthermore, the method and process of checking and calculating the fatigue of members are carried out. (3) the construction drawing design of the steel truss girder of the 1-64m ballast deck of Shapinghe Bridge is completed. (4) the construction drawing of railway ballast is summarized. Design method and procedure of simply supported steel truss bridge on deck.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.5
本文编号：2207691
[Abstract]:With the running of high-speed train and the improvement of people's living standard, the environment pollution caused by the vibration and noise when the train passes through the bridge is reduced, and the ride comfort is improved. The adoption of ballast deck in simply supported steel truss bridges has become a trend of development. However, there are not many steel truss beams on the ballast deck, and there are still many technical problems to be solved in the design. In view of the structure and stress characteristics of simply supported girder on railway ballast deck, the design of simply supported steel truss beam on railway ballast deck is carried out. The simplified algorithm and the analysis method of spatial structure are studied first. Based on the fatigue calculation theory and the coupling theory of vehicle-line-bridge system, the structural design method of simply supported girder bridge on railway ballast deck is studied. Based on the construction of simply supported steel truss beam on 1-64m ballast deck of Shaping River Bridge, the dimensions of main truss clearance space, main component size and main truss geometry diagram of steel truss girder on ballast deck are studied. The structural material, connection mode and bridge deck are designed, and then the structural calculation model is established, which mainly considers the design load and combination, calculates the internal force of each member, checks and calculates the high strength bolt connection, the structural stability calculation and the structural fatigue checking calculation. The results and conclusions are as follows: (1) the calculation model of plane truss structure and space beam element structure are established, the internal forces of steel truss structure are calculated and compared with the results, and it is found that there are two calculation methods between them. The error dispersion of different members is larger. The axial forces calculated by the plane truss structure model are larger than those obtained from the spatial beam element structure model except for the slightly small end inclined bar. It is safe to use the calculation results of plane truss structure model to calculate the member correlation. (2) the design load combination method of fatigue checking calculation is summarized. Furthermore, the method and process of checking and calculating the fatigue of members are carried out. (3) the construction drawing design of the steel truss girder of the 1-64m ballast deck of Shapinghe Bridge is completed. (4) the construction drawing of railway ballast is summarized. Design method and procedure of simply supported steel truss bridge on deck.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.5
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