Time-History Analysis of Soil Slope Subjected to Seismic Loadings

In the present paper, the seismic response of cohesive-frictional soil slope has been investigated in the time-domain by using the 1995 Kobe earthquake records. A 2-dimensional dynamic finite element model has been developed in the plain-strain condition by considering the elastic perfectly plastic Mohr-Coulomb soil model criterion. The analysis simulates maximum horizontal and vertical seismic accelerations simultaneously at the base of the slope. The seismic response of the slope under combined seismic accelerations has been reported in terms of the displacement induced during the earthquake shaking period. The results show that the induced displacement of slope under combined seismic loadings is greater compared to the case of horizontal loading only. Further, the slope is expected to fail at the toe level first rather than at the crest level.