有轨电车桥上无缝线路力学特性研究  

Study on Mechanical Properties of Seamless Track on Tram Bridge

作　　者：刘静之 LIU Jing-zhi(Shanghai Urban Construction Design&Research InstituteCo.,Ltd.,Shanghai 200125,China)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《中国市政工程》2024年第2期97-102,149,共7页China Municipal Engineering

摘　　要：为研究有轨电车桥上无缝线路的力学特性,以某实际工程为例,建立轨道-桥梁一体化的有限元模型。对不同工况下的梁轨互相作用进行全面的计算分析。最后,系统性地分析温度、轨道、桥梁参数变化对梁轨互相作用的影响。研究结果表明,有轨电车桥上无缝线路的设计应考虑梁轨互相作用。梁轨互相作用受到桥梁温度变化、线路纵向阻力等因素影响,困难条件下可采用小阻力扣件以减小钢轨附加力。此外,通过改变桥梁支座布置来缩短温度跨度、设置钢轨伸缩调节器均能起到改善有轨电车桥上无缝线路钢轨附加力的内力分布。To study the mechanical properties of seamless track on tram bridge,a finite element model of track bridge integration is established by taking a practical project as an example.The beam rail interaction under different working conditions is comprehensively calculated and analyzed.Finally,the influence of temperature,track and bridge parameters on beam rail interaction is systematically analyzed.The results show that the beam rail interaction should be considered in the design of seamless track on tram bridge.The beam rail interaction is affected by the temperature change of the bridge,the longitudinal resistance of the line and other factors.Under difficult conditions,small resistance fasteners can be used to reduce the additional force of the rail.In addition,changing the arrangement of bridge bearings to shorten the temperature span and setting rail expansion regulators can improve the internal force distribution of the additional force of the seamless track rail on the tram bridge.

关 键 词：有轨电车 桥上无缝线路 梁轨互相作用 

分 类 号：U213.9[交通运输工程—道路与铁道工程]