现代有轨电车嵌入式轨道结构桥上梁轨相互作用研究

发布时间：2018-04-28 22:10

本文选题：有轨电车 + 嵌入式轨道　；参考：《西南交通大学》2015年硕士论文

【摘要】：现代有轨电车嵌入式轨道结构桥上铺设无缝线提高了线路运营的平顺性,能够减小有轨电车的动力作用和轨道维修工作量,延长轨道结构和桥梁的使用寿命。但是由于存在梁轨相互作用使得钢轨、支座和墩顶产生附加纵向力,对桥上无缝线路钢轨强度、稳定性产生影响等带来问题,从而影响桥上无缝线路的铺设。本文在国内外已有的研究基础上,主要对嵌入式轨道结构桥上无缝线路梁轨相互作用以及设计锁定轨温的方法进行研究。首先,研究嵌入式轨道结构桥上无缝线路梁轨相互作用的机理,分析桥上无缝线路伸缩力、挠曲力和制动力等产生的原因和过程,并对影响桥上梁轨相互作用的因素进行讨论。其次,分析研究桥上嵌入式轨道结构各部件的功用和性能,在参考研究成果的基础上,建立了桥上嵌入式轨道结构的梁轨相互作用计算模型,并阐述计算过程中的思路和方法。然后,根据成都市金凤凰大道实际工程,选取含连续梁和简支梁的特殊结构的线路,通过建立的梁轨相互作用计算模型,分析研究由线路纵向阻力、支座剪切刚度、墩顶纵向刚度、制动率等因素对桥上无缝线路附加纵向力、梁轨相对位移以及支座和墩顶的纵向力产生的影响。最后,通过分析嵌入式轨道结构桥上无缝线路稳定性概念、失稳过程及其影响因素,建立稳定性模型,计算桥上无缝线路稳定允许温升；利用准静态法对钢轨中产生的动弯应力进行分析研究；通过强度条件分别计算钢轨允许温升和温降,并对桥上无缝线路锁定轨温进行计算和探讨。
[Abstract]:The laying of seamless lines on the embedded track structure bridge of modern tram improves the smoothness of line operation, reduces the power function and track maintenance workload of tram, and prolongs the service life of track structure and bridge. However, due to the existence of beam-rail interaction, additional longitudinal forces are produced on the rail, supports and piers, which affect the strength and stability of the jointless rail on the bridge, thus affecting the laying of the jointless track on the bridge. Based on the existing research at home and abroad, this paper mainly studies the interaction of rail beam and rail on embedded track structure bridge and the method of designing locked rail temperature. Firstly, the mechanism of the interaction between the beam and rail of the jointless track on the embedded track structure bridge is studied, the causes and processes of the stretching force, the flexural force and the braking force of the jointless track on the bridge are analyzed, and the factors influencing the interaction between the beam and the rail on the bridge are discussed. Secondly, the function and performance of the components of embedded track structure on the bridge are analyzed. Based on the research results, the calculation model of the beam-rail interaction of the embedded track structure on the bridge is established, and the ideas and methods in the calculation process are expounded. Then, according to the actual project of Jinghuang Avenue in Chengdu, the line with special structure including continuous beam and simply supported beam is selected, and the longitudinal resistance and shear stiffness of support are analyzed through the established calculation model of beam-rail interaction. The effects of the longitudinal stiffness and braking ratio of the pier top on the additional longitudinal force of the jointless track on the bridge the relative displacement of the beam and rail and the longitudinal force of the support and the top of the pier. Finally, by analyzing the concept of the stability of the seamless track on the embedded track structure bridge, the instability process and its influencing factors, the stability model is established, and the allowable temperature rise of the jointless track on the bridge is calculated. The dynamic bending stress in rail is analyzed by quasi-static method, and the allowable temperature rise and temperature drop of rail are calculated by strength condition, and the temperature of jointless track locking on bridge is calculated and discussed.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441.7

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