降雨の影響を考慮可能な盛土斜面の動的解析

摘要

The effect of the antecedent precipitation is pointed out as a reason of geo-disaster in the previous great earthquakes such as 2004 Niigata-ken Chuetsu Earthquake. However, the effect of the rainfall is not considered in the seismic guidelines. In other words, the change of the geomaterial characteristics due to a rainfall is not considered. In this study, seismic FEM analysis method of a slope to consider the effect of the antecedent precipitation is proposed. We introduce the simulation results of two case histories ; one is the shaking table test and the other is a damaged embankment in field. The proposed analysis method is useful for the performance evaluation of a slope/embankment considering the combination effect of a rainfall and an earthquake.