【作者】 刘维宁； 夏禾； 郭文军；

【Author】 Liu Weining Xia He Guo Wenjun (Northern Giaotong University, Beijing 100044)

【机构】 北方交通大学；

【摘要】 本文的研究包括两部分:(1)轨道基础——衬砌结构——地层系统的响应模型,以分析列车振动荷载的传播规律;(2)地铁车辆——轨道系统的振动模拟,以确定列车振动荷载。主要结论是:(1)离开地铁隧道中心线一定距离的地表范围内,存在一个振动放大区;(2)存在一个地层响应的主要频带,在此范围以内的地面建筑如果其自振周期落于这一频带,则会受到过往地铁车辆振动的显著影响。更多还原

【Abstract】 This paper studies the characteristics of ground vibrations due to underground trains and their transmission laws. The study consists of the simulations of the train-track system vibration, which provides the excitation loads of moving trains onto the tunnel structure, and the calculation of the track tunnel-ground system vibration, by which the transmitting properties of ground acceleration and velocities are studied. The main results include 2 aopectcs:vibration amplifying area exists certain distance away from the tunnel centre, and thedominant frequencies of the ground vibration concentrate to a certain band. Buildings that locate in that area and whose resonance frequency drops into that frequency band would be greatly influenced by the underground train-induced vibration.更多还原