行波激励下穿越断层隧道的地震响应分析  

Seismic Response Analysis for Tunnel Crossing Fault Under Excitation of Traveling Waves

作　　者：张广洋[1] 李旭升[2] 高波[2] 申玉生[2] 

机构地区：[1]四川雅西高速公路有限责任公司,成都市610041 [2]西南交通大学土木工程学院,成都市610031

出　　处：《公路》2011年第10期233-237,共5页Highway

基　　金：国家自然科学基金科学部主任基金项目;项目编号50848020

摘　　要：从土—结构相互作用模型出发,运用数值分析方法对行波作用下跨不同断层宽度的隧道结构进行了三维弹塑性分析,以研究其地震动力响应特性。从计算结果可得,在断层影响范围内隧道的水平位移、竖向位移和最大主应力均出现明显增大的现象;随着断层宽度的增加,其水平位移和竖向位移均变大,其两侧影响范围也变大,而其最大主应力变化不明显。Based on soil-structure dynamic interaction model with elastic-plastic characteristics of materials taken into consideration,a three-dimensional numerical analysis by adopting time domain integration algorithm is applied to study the seismic responses of a tunnel crossing the fault under the action of traveling waves.Results indicate that horizontal displacement,vertical displacement and maximum principal stress are significantly increased in the area affected by faults;with the increase of the width of the fault,its horizontal and vertical displacement are larger and the scope of its influence is larger,while the maximum principal stress did not change significantly.

关 键 词：隧道 断层 位移 行波效应 地震响应 分析 

分 类 号：U452.28[建筑科学—桥梁与隧道工程]