DYNAMIC RESPONSE ANALYSIS OF UNDERGROUND STRUCTURES DURING PROPAGATION OF RAYLEIGH WAVES
Rayleigh wave input method is proposed based on Viscous-Spring Boundaries. The dynamic response of a tunnel during propagation of Rayleigh wave is studied using the proposed method, and the influence of depth is investigated in detail. Numerical analysis results show good accuracy of the wave motion input method and large effect of Rayleigh wave on the dynamic response of shallow underground structures. If structural depth D is larger than a critical depth D0, the influence of Rayleigh wave on dynamic response will reduce with the increase in burial depth; otherwise the influence is governed by the property of Rayleigh wave. The influence of depth on underground structures in nuclear explosion tests is briefly introduced, the results of which show good agreement with the analyzed ones using the proposed method.