文献类型：期刊文献

英文题名：Semi-analytical simulation for ground-borne vibration caused by rail traffic on viaducts: Vibration-isolating effects of multi-layered elastic supports

作者：Zhang, Zhijun Li, Xiaozhen Zhang, Xun Fan, Jie Xu, Guihong

第一作者：张志俊

通信作者：Li, XZ[1]

机构：[1]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China;[2]Southwest Jiaotong Univ, Sch Civil Engn, Dept Bridge Engn, Chengdu 610031, Peoples R China

第一机构：贵州理工学院土木工程学院

通信机构：corresponding author), Southwest Jiaotong Univ, Sch Civil Engn, Dept Bridge Engn, Chengdu 610031, Peoples R China.

年份：2022

卷号：516

外文期刊名：JOURNAL OF SOUND AND VIBRATION

收录：;EI(收录号：20214311047106);Scopus(收录号：2-s2.0-85117334685);WOS:【SCI-EXPANDED(收录号:WOS:000725044200012)】；

基金：The authors are grateful to the financial support provided by the National Natural Science Foundation of China (Grant No. 52008123 and 51868009) , Science and Technology Foundation of Guizhou Province, China (Grant No. [2018] 1058) , and the Startup Project for High-level Talent of Guizhou Institute of Technology (No. XJGC20190651 and XJGC20190650) .

语种：英文

外文关键词：High-speed railway; Ground-borne vibration; Semi-analytical; Multi-layered elastic supports; Vibration isolation

摘要：In this study, a semi-analytical model is presented to investigate structure and ground-borne vibrations caused by trains running over viaducts while considering the vibration-isolating effects of the multi-layered elastic supports. The vehicle model with 10 degrees of freedom was coupled with a four-layered track-bridge model using linearized Hertz contact springs. The wheel-rail forces in the frequency domain were computed from the moving irregularity excitation and receptance values of the wheels, track, and contact springs. The bridge bearing forces were determined by substituting the wheel-rail forces into the equation of motion for the track, which was then applied to the pile foundation-soil interaction model. Using thin layer element and flexible volume methods, the three-dimensional pile foundation-soil interaction model was established. This enabled the free-field vibration to be computed using Green's function for horizontally stratified soil on a half-space. The computed results of the proposed model were compared with those of the field test and existing method. Notable differences were identified in the dominant frequency range of vibration of the vehicle, rail, track slab, and bridge. The natural frequency of the wheel-rail system affects the peak frequency of the wheel-rail force and critically affects the bridge bearing forces. A soft rail pad can be used to isolate the vibration of the car-body, rail, track slab, bridge, and ground at frequencies above 50 Hz. However, this causes vibration amplification in the range of 20-50 Hz. To obtain the benefit of vibration isolation on the ground, a slab track fitted with relatively stiff rail pads and soft bridge bearings is recommended for consideration in the engineering design.