This paper aims to investigate the seismic response dynamic characteristics of the subway tunnel structure and the interaction characteristics of the tunnel structure and the surface building under earthquake action. Adopting the dynamic finite element method, several overall seismic response calculation models of the soil-tunnel-surface building are established to research the overall natural period of the stratum and effects of ground building on the seismic response of underground tunnels. Studies have shown that: there is an acceleration peak “magnified area” on the surface diagonally above when there is a subway tunnel; subway tunnels have a significant amplification effect on the seismic response of adjacent buildings; the presence of adjacent buildings on the ground also has a certain amplification effect on the acceleration of the tunnel top; the influence on the seismic response of the underground tunnel decreases as the clear distance between the surface building and the subway tunnel increases; the smaller the stiffness of the soil, the greater the influence of the existence of surface buildings on the seismic response of the tunnel structure.

本文旨在研究地铁隧道结构在地震作用下的地震反应动力特性以及隧道结构与地面建筑物的相互作用特性。采用动态有限元方法，建立了土隧道-地表建筑整体地震响应的几种计算模型，研究了地层的整体自然周期以及地基对地下隧道地震响应的影响。研究表明：在有地铁隧道的情况下，在对角线上方的表面有一个加速度峰值“放大区域”。地铁隧道对邻近建筑物的地震响应具有明显的放大作用；地面上相邻建筑物的存在对隧道顶部的加速度也有一定的放大作用；随着地面建筑物与地铁隧道之间的净距增加，对地下隧道地震响应的影响减小；土的刚度越小，地表建筑物的存在对隧道结构地震响应的影响越大。