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杨彭钧¹，刘琦¹，吴斐璠²，王慧东¹

（1. 石家庄铁道大学 土木工程学院，河北 石家庄 050043；2.北京建业通工程检测技术有限公司，北京 100076）

摘 要：为研究高速铁路桥梁与轨道系统地震响应规律，以某高速铁路连续梁及T构梁为研究对象，建立考虑轨道约束的线桥一体化模型，研究一致激励及非一致激励下高速铁路桥梁无缝线路地震响应。探讨线路纵向阻力、桥墩刚度、支座类型、行波效应对梁轨系统地震响应的影响。结果表明：轨道约束会提升结构低阶纵向自振频率，对结构竖向及横向频率影响较小；轨道约束对结构内力影响较大，墩底剪力最大减小27.56％；梁缝位置为钢轨不利位置；小阻力扣件对减小钢轨纵向力有显著作用；增加桥墩刚度可明显减小梁轨相对位移；摩擦摆减隔震支座可明显减小连续梁固定墩墩底弯矩，从经济角度出发可仅在主墩布置摩擦摆减隔震支座；行波效应对轨道系统影响较大，同时对墩底弯矩也有不同程度的影响。

关键词：无缝线路；线桥一体化模型；梁轨系统；地震响应；行波效应

中图分类号：U441.7    

文献标志码：A        

文章编号：1005-8249（2024）02-0125-07

 DOI：10.19860/j.cnki.issn1005-8249.2024.02.023

 

YANG Pengjun¹, LIU Qi¹, WU Feifan²,WANG Huidong¹

（1. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043，China；2.Beijing Jianyetong Engineering Testing Technology Co.,Ltd.，Beijing 100076，China）

Abstract: In order to study the seismic response law of continuous girder bridge and track system of high-speed railway ,an integrated model of line and bridge considering track constraints is established  with continuous beams and T-beams of a high-speed railway as the research objects,and the seismic response of seamless lines of continuous girder bridges under consistent excitation is studied,the effects of longitudinal resistance, pier stiffness, support type on the seismic response of beam-rail system were discussed The results show that the track constraint will increase the low-order longitudinal self-resonance frequency of the structure,which has less effect on the vertical and transverse frequencies of the structure. The orbit constraint has a greater impact on the internal force of the structure, and the shear force at the bottom of the pier is reduced by 27.56%; the position of the beam joint is the unfavorable position of the rail; the small resistance fasteners has a significantly effect on reducing the longitudinal force of the rail; the stiffness of the pier can significantly reduce the relative displacement of the beam and rail; the friction swing damping isolation bearing can be arranged only on the main pier from the economic point of view; The traveling wave effect has a great impact on the track system, and at the same time has different degrees of influence on the bending moment at the bottom of the pier bottom.

Keywords: seamless lines; line-bridge integrated model; beam-rail system; seismic response;traveling wave effect

 

 作者简介：杨彭钧（1999—），男，硕士研究生，主要研究方向：桥梁结构设计与施工技术。

通信作者：王慧东（1964—），男，博士，教授，主要研究方向：桥梁工程教学与科研工作。

收稿日期：2023-10-26