Abstract: The displacements of two selected international landslide cases are calculated by two-dimensional program of UDEC and Newmark method, respectively. Comparison between the calculating results and the field values of earthquake induced displacements shows that the displacements calculated by Newmark method are lower than the field values and the displacements simulated by UDEC are close to the field values. Then, the influences of height and angle of bedding slope and angle of interface on displacement characteristics of bedding slopes under earthquake are analyzed. It is reported that the displacement doesn’t monotonously increase with the increasing of H (height of bedding slope). It reaches max when H is about 100 m and then decreases with the increasing of H. And when H is above 200m, its decreasing rate is small. It is also suggested that the displacement increases with the increasing of the angle of bedding slope. As well, the displacement increases with the increasing of β (angle of interface), and its increasing rate tended to obviously increase with the increasing of β at the condition of β larger than the friction angle of rock joint.

Key words: earthquake, bedding slope, displacement, UDEC, Newmark method