高烈度区公路隧道横通道地震响应分析  

Seismic response analysis of cross-passage of a highway tunnel in high intensity zone

作　　者：张楠 严松宏 刘子阳 ZHANG Nan;YAN Songhong;LIU Ziyang(Shenzhen Municipal Design&Research Institute Co.,Ltd,Shenzhen 518029,China;Key Laboratory of Road&Bridges and Underground Engineering of Gansu Province,Lanzhou 730070,China;School of Civil Engineering of Lanzhou Jiaotong University,Lanzhou 730070,China;Gansu Province Engineering Laboratory of Rail Transit Mechanics Application,Lanzhou 730070,China)

机构地区：[1]深圳市市政设计研究院有限公司,广东深圳518029 [2]甘肃省道路桥梁与地下工程重点实验室,甘肃兰州730070 [3]兰州交通大学土木工程学院,甘肃兰州730070 [4]甘肃省轨道交通力学应用工程实验室,甘肃兰州730070

出　　处：《世界地震工程》2019年第3期198-203,共6页World Earthquake Engineering

基　　金：国家自然科学基金资助项目(51268030)

摘　　要：双洞隧道主隧道与横通道交接部位是隧道抗震中的薄弱位置,以穿越高烈度区隧道为背景,采用MIDAS GTS-NX有限元分析软件,对在汶川地震动作用下的公路隧道横通道进行地震响应分析。在X方向和Y方向地震动荷载的共同作用下,通过对围岩和衬砌的计算结果研究,得出以下结论:隧道整体的最大相对位移主要发生在主隧道与横通道拱顶和连接处;衬砌相对位移随埋深增加而减小;隧道产生的横向变形更大;横通道边墙位置更容易受到剪切破坏,主隧道与横通道连接处拱脚的弯矩、剪力、最大主应力和最大剪应力最大,应重点采取设防措施。0x09The interface between the main tunnel and the cross-passage of double-hole tunnel is the weak point in the seismic resistance of tunnels.In this study,MIDAS GTS-NX finite element analysis software was used to analyze the seismic response of the cross-passage of the highway tunnel under the action of Wenchuan ground motion for the tunnel passing through the high-intensity earthquake area.Under the combined action of the seismic loads in the X direction and Y direction,based on the calculation results of surrounding rock and lining,the following conclusions are drawn:The maximum relative displacement is at the vault of the joint between tunnels and the cross-passage;the relative displacement of lining decreases with the increase of burial depth;the transverse deformation of the tunnel is larger;the cross passage sidewalls are more vulnerable to shear failure;the bending moment,shear force,maximum principal stress and maximum shear stress of the arch foot at the interface between the main tunnel and the cross-passage are the largest,in which defensive measures should be taken into account with emphasis.

关 键 词：横通道 汶川地震动 动力响应分析 MIDAS/GTS-NX 

分 类 号：TU91[建筑科学—建筑理论]