摘要
利用有限元数值方法,对地铁列车振动荷载作用下近距离平行隧道结构的二维弹塑性动力响应进行模拟,分析了单列列车荷载以及双列列车荷载作用下土体-隧道结构体系的加速度和内力响应时程曲线。研究表明,列车动力荷载作用下的内力值要比无列车荷载作用下的内力值有较大程度的增加;在单列列车荷载作用下,另一相邻平行隧道的加速度响应、弯矩、轴力峰值要比列车运行所在隧道相应点处的响应值要小;在双列列车荷载作用下隧道结构体系动力响应值要比单列列车荷载作用下的动力响应值有显著增加。
Two-dimensional elastoplastic dynamic responses of close parallel metro tunnels to vibration loading caused by passing metro trains are studied by using finite element method. The responses of soil-tunnel system such as vibration acceleration, axial load and bending moment etc. are analyzed for one-arrange train loading and two-arrange train loading. Calculation results show that the dynamic responses such as axial load and bending moment are obvious. The responses of the tunnel with passing metro trains are greater than another tunnel without passing metro train. When two-arrange trains are passing simultaneously, the dynamic responses are notably increased than the responses caused by one-arrange passing trains.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2009年第1期123-128,共6页
Rock and Soil Mechanics
基金
北京市自然科学基金(No.8062024)。
关键词
地铁列车
振动加速度
地铁隧道
动力响应
metro train
vibration acceleration
metro tunnel
dynamic response
