Study of dynamic response of bedding rock slope under earthquakes

The dynamic response of slopes under earthquake is the basis of slope dynamic stability research. A dynamic numerical simulation model of bedding rock slope with bolts was established by using FLAC3D program; the dynamic response under coupling vertical and horizontal seismic waves is studied. The result of numerical simulation shows that the coupling vertical and horizontal seismic waves are closer to the actual situation and make greater destruction of the rock mass. Amplifications in the vertical zoom and free surface exist in bedding rock slope under coupling effects of earthquake. With elevation increasing, the horizontal and vertical accelerations of slope increase, particularly at the structural surface. Master factors of slope body early slump destruction are horizontal and vertical crack generated by vertical seismic waves. Amplification effect of parameters in slope dynamic response shows that the amplification coefficient of vertical acceleration is larger than that of horizontal acceleration; and the vertical and horizontal velocity decreasing one by one. With the increasing of a(V)/a(H) under coupling effects of earthquake, the horizontal displacement of monitoring points increase and it proves that the vertical seismic action plays an important role in the destruction.