快速轨道交通运行引起的场地振动反应分析

在运输业高度发达的当今社会,轨道交通运行引起的环境振动已经引起了越来越多的关注和研究。本文以ABAQUS软件为计算平台,基于轨道几何不平顺理论荷载模型,采用基于Davidenkov骨架曲线的非线性动粘弹塑性模型描述土的动力特性,以南京典型场地条件为研究对象,对快速轨道交通运行引起的场地地表振动特性进行了分析,得到了不同列车车速下地表振动的强度、频谱特性及其衰减规律,并分析了场地振动强度的影响因素,为进一步研究和控制快速轨道交通运行引起的地面振动提供了基础性资料。

Response Analysis of Ground Vibration Induced by Rapid Rail Transit

In modern society of highly development of transportation,the environmental vibration induced by rapid rail transit has set off more and more close attention and researches.Vibration responses of typi- cal sites in Nanjing city induced by rapid rail transit are analyzed with the software ABAQUS.Based on the load model of irregularly track geometric condition and the nonlinear dynamic visco-elasto-plastic con- stitutive model of Davidenkov skeleton curve of the soils,the responses of ground surface vibration with different train speeds for typical sites in Nanjing city are analyzed to obtain the frequency character of vi- bration and acceleration intensity of ground surface vibration as well as their attenuating law,which are basic data to further research on the control of ground surface vibration induced by rapid rail transit.