移动荷载作用下轨道地基的位移反应  

Displacement response of track foundation soil under movable traffic load

作　　者：汤爱平[1] 张继强[1] 涂杰文[1] 刘克同[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《世界地震工程》2010年第S1期182-186,共5页World Earthquake Engineering

基　　金：国家高技术研究发展计划(863计划)项目(2008AA11Z104)

摘　　要：将车辆荷载等效为移动的动点荷载,地基等效为弹性半空间,利用改进的圆心位移影响函数法求解了轨道路基的竖向位移反应的解析解,探讨了离车辆荷载距离、车辆荷载振动频率、速度对位移的影响规律。研究表明离振源距离的增加,位移函数收敛的值逐渐减小;频率对位移的变化有明显的影响,位移函数收敛的趋势随频率的增大而变快,并且变化的幅度随频率的增大而越来越大;在速度为160公里/小时范围内,竖向位移对速度的影响规律不明显。The soil dynamic response under movable traffic load in track foundation was solved based on the Central Circle Displacement Effect Function Method(CCDEFM).According to simulation results of the vertical displacement,it was found that the load vibration frequency and distance from the moving traffic load have a great effect on the displacement response of soil foundation,but the moving velocity of load has little effect on it.These results will be useful to design the vibration isolation for reducing the ground and building vibration.

关 键 词：移动荷载 轨道地基 位移反应 圆心位移影响函数法 

分 类 号：U213.1[交通运输工程—道路与铁道工程]