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 the soil-structure interaction model, a three-dimensional elasto-plastic analysis of the tunnel structure with different fault width under traveling waves is carried out by numerical analysis method to study its seismic dynamic response. It can be seen from the calculation results that the horizontal displacement, vertical displacement and maximum principal stress of the tunnel all increase obviously within the influence range of the fault. As the fault width increases, the horizontal displacement and vertical displacement of the tunnel increase, Both sides of the influence range also becomes larger, and its maximum principal stress change is not obvious.