Abstract
Aseismic design method of earth structure concerns only the safety factor and the permanent displacement; however, the estimation of the range of slope failures is necessary to make a safety regulations for construction of buildings on a slope. Based on slope stability analysis for a case history in the 2001 Geiyo earthquake, and a parametric study in consideration of the heterogeneity of the ground strength, the range of slope failures due to earthquakes were investigated. The results was summarized as a rational criteria for the range of slope failures considering slope angles, slope height and input motion level. Thus, the proposed criteria enables a rational safety assessement of buildings close to a slope.
