摘要
利用FLAC3D对地震荷载作用下某隧道衬砌在不同埋深情况下的位移、振动速度变化特征及规律进行了详细的动力分析,结果表明:(1)在地震荷载作用下,公路隧道衬砌拱顶与拱底竖向位移及竖向振动速度响应随埋深增大而增加,因此,在底部受地震荷载作用下隧道浅部的竖向位移响应小于深部;(2)在地震荷载作用下,公路隧道衬砌拱顶与拱底水平位移及水平方向振动速度响应随埋深增大而减小。
The analysis of tunnel lining under earthquake is made with FLAC3D in this paper. Features and regulations of displacement and vibrations speed variation under different bury depth are detailed analyzed. The results show that under earthquake loads. （1） the vertical displacement and vertical shaking response on both the crown and bottom of lining decrease with the increasing of overburden, hence the vertical displacement for shallow parts is smaller than that of deep buried~ and （2） both horizontal displacement and horizontal shaking speed response both on crown and bottom of lining decrease with increase of the bury depth. The present work could be used as a primary guidance to the aseismic design for underground cavern.
出处
《公路》
北大核心
2014年第5期37-41,共5页
Highway
关键词
地震荷载
公路隧道
位移特征
FLAC
seismic load
highway tunnel
displacement characteristics
FLAC
