隧道横断面反应位移法基本原理及其应用  

BASIC THEORY OF SEISMIC DEFORMATION METHOD IN CROSS SECTION OF TUNNEL AND ITS APPLICATION

作　　者：耿萍[1] 张景[1] 何川[1] 晏启祥[1] 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,四川成都610031

出　　处：《岩石力学与工程学报》2013年第S2期3478-3485,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2010CB732105;2011CB013605);国家自然科学基金资助项目(51378433)

摘　　要：我国大量的隧道工程位于高地震烈度区,隧道作为国家生命线工程的主体结构之一,必须对其抗震计算方法给予高度重视。基于隧道的振动特性,从地下结构与周围地层的整体运动微分方程出发,总结归纳隧道横断面反应位移法的基本原理及计算模型,得到均质半无限地层和非均匀成层地层在地震荷载作用下地层位移的求解方法,并通过反应位移法和时程法的计算和比较分析,对反应位移法的适应性进行探讨,研究结果表明:反应位移法理论清晰,反映地震响应主要由地层相对位移控制的土层或软弱岩层隧道的振动特性,在具备工程场地位移或速度反应谱的条件下,计算较方便快捷,不失为该类隧道的一种较好的抗震计算方法。In China,great quantities of tunnels are located in high seismic intensity area. As one of the main structure of the national lifeline,tunnel seismic calculation method must be paid high attention to. Based on seismic response characteristics of the tunnel as well as differential kinematics equations of underground structures and surrounding rocks,the basic theory of seismic deformation method in cross section of tunnel is summarized. The solving methods of stratum displacements in homogeneous semi-infinite formation and bedded formation under seismic load are put forward. The adaptabilities of the seismic deformation method are studied by comparative analysis in both methods of seismic deformation method and time-history analysis method. The results prove that the seismic deformation method with clear theory can reflect the vibration characteristics of soil or weak rock tunnel whose seismic response is mainly influenced by ground relative displacement,and the computational process is convenient and efficient. It is a good method for this type of tunnel seismic calculation method if having the displacement or velocity response spectrum of project site.

关 键 词：隧道工程 抗震计算方法 地层位移 反应位移法 时程分析法 

分 类 号：U452.2[建筑科学—桥梁与隧道工程]