交通荷载下带有高度差的场地振动响应
Vibration Response of Soil with Height Difference under Traffic Load
摘要: 本文以重载车辆所致地面振动为研究对象，选取某城市电子厂房的待建场地的地勘情况进行仿真研究，建立不同高度差下的车辆振动激励的响应分析，主要对比在不同高度差下重载货车的仿真模拟振动响应。结果发现随着高度差的增加三个方向加速度RMS值均造成衰减并且衰减幅度逐渐放缓，Z向衰减最为显著，X向所受影响最小；X向在2~4 m处的中频段能量产生放大效应；随着高度的增加三个方向主频均在逐渐降低，且中低频段衰减较低频衰减迅速。
Abstract: In this paper, the ground vibration caused by heavy duty vehicles is taken as the research object, and the geological prospecting situation of a city electronic workshop to be built is selected for simulation research. The response analysis of vehicle vibration excitation under different height differences is established, and the simulation vibration response of heavy duty trucks under different height differences is mainly compared. The results show that with the increase of height difference, the RMS values in the three directions all cause attenuation and the attenuation amplitude slows down gradually. The attenuation in the Z direction is the most significant, and the effect in the X direction is the least. The X-direction amplifies the energy in the middle frequency band at 2~4 m. With the increase of height, the main frequency of the three directions gradually decreases, and the attenuation of the middle and low frequency band is faster than that of the low frequency band.
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