摘要
针对饱和地基上列车运行引起的地面振动问题,利用列车-轨道有限元模型计算得到轨道与路基间的相互作用力,经傅立叶变换后作为地面振动计算的激励荷载;在此基础上,结合由薄层法得到的饱和地基动力G reen函数,对饱和地基上列车行驶条件下所产生的地面振动进行了计算分析和振动评价.结果表明:列车车速在一定范围内对振动有较大影响;列车引起的地面振动在近轨道处基本能够满足住宅区振动标准.
In the paper,in view of the problems of ground vibration due to railway traffic on saturated half-space,the sleeper-embankment interaction forces are calculated with FEM using train-track interaction model,which can be used as exciting loads for calculating ground vibration after Fourier transform.Then in combination with the Green＇s function for saturated ground derived by thin layer method, ground vibrations due to high-speed railway traffic are calculated and effects of train speed and soil parameters on ground vibration are investigated and discussed in detail.The results show that increasing train speed can substantially increase the ground vibration.Moreover,the ground vibration level in nearfield can satisfy the vibration criterion set for the residence area.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2010年第3期73-76,共4页
Journal of Zhengzhou University（Engineering Science）
关键词
铁路交通
地面振动
饱和地基
薄层法
振动评价
railway traffic
ground vibration
saturated layered ground
thin layer method
vibration assessment
