Study on dynamic response of slope under obliquely incident SV-wave

Abstract

The change of the incident angle of the seismic wave will lead to the change of the mode of action of the earthquake, which will affect the dynamic response of the slope.In order to study the effect of oblique incidence of seismic SV wave on the dynamic response of rock slope, the problem of seismic fluctuation is transformed into wave source problem. The author uses the viscoelastic artificial boundary to simulate the scattering wave field and applys the equivalent loads to the boundary nodes, which realize the fluctuation input of obliquely incident seismic wave. The semi-infinite space numerical example verifies the validity and accuracy of the method. The results show that the angle of incidence and slope angle has a great impact on seismic dynamic response of slope surface. When the SV wave is incident obliquely, the peak ground acceleration of the rock slope gradually increases with the incident angle increasing, and the peak ground acceleration near the top of the slope increases with the increase of slope angle. The results of this paper can provide important reference for seismic stability analysis of slope.