高速铁路轨道-简支梁桥系统桥上行车性能试验研究  

Experimental study on running performance of track-simply upported bridge system of high-speed railway

作　　者：蒋丽忠[1,2] 聂磊鑫 周旺保[1,2] 张云泰 余建 柴喜林 JIANG Lizhong;NIE Leixin;ZHOU Wangbao;ZHANG Yuntai;YU Jian;CHAI Xilin(School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Research Center of High-speed Railway Construction Technology,Central South University,Changsha 410075,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中南大学高速铁路建造技术国家工程研究中心,湖南长沙410075

出　　处：《中南大学学报（自然科学版）》2022年第5期1711-1718,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(U1934207,52078487,51778630);湖南创新型省份建设专项经费资助项目(2019RS3009);中央高校基本科研业务费专项资金资助项目(502501006)。

摘　　要：基于多跨高速铁路CRTSII型无砟轨道简支梁桥系统开展桥上行车动力性能室内缩尺试验,并对不同列车行驶速度下钢轨、轨道板、底座板和主梁的竖向动力响应规律进行分析。研究结果表明:层间阻尼效应使不同构件层的竖向位移时程曲线的峰值及其形状有显著差异,主梁、底座板、轨道板和钢轨的竖向位移响应峰值依次增大;随行车速度增加,各构件的竖向位移时程曲线震荡波动明显增大;轮对与轨道-桥梁系统接触位置的局部效应非常显著,轮对局部作用对钢轨、轨道板、底座板和主梁的动力变形的影响依次减弱;轨道板和钢轨动力系数比较接近且明显大于主梁和底座板的动力系数,调整CA砂浆层阻尼参数能有效控制移动列车作用下桥梁-轨道系统动力特性。Based on the CRTS II type ballastless track system of the multi-span simply supported bridge on highspeed railway,the indoor scale test of the running dynamic performance on the bridge was carried out,and the vertical dynamic responses of the rail,track slab,base plate and girder at different train speeds were analyzed.The results show that the interlayer damping effect makes the peak and shape of the vertical displacement time-history curves of different component layers significantly different,and the peaks of the main beam,base plate,track plate and rail increase sequentially;with the increase of train speed,the fluctuation of the vertical displacement timehistory curve of each component becomes significantly larger;the local effect of the contact position of the wheelset with the track-bridge system is significant,and the influence of the local effect of the wheelset on the dynamic deformation of the rail,track slab,base plate and girder is sequentially weakened;the dynamic coefficients of the track slab and rail are relatively close and significantly greater than the dynamic coefficients of the girder and base plate,and adjusting the damping parameter of CA mortar layer can effectively control the dynamic characteristics of the bridge-track system under the action of moving trains.

关 键 词：高速铁路简支梁桥 无砟轨道 缩尺试验 桥上行车试验 动力系数 

分 类 号：U238[交通运输工程—道路与铁道工程] U446.1[建筑科学—桥梁与隧道工程]