Seismic response analysis of a slope to consider the effect of the rainfall

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  • HATA Yoshiya
    Research and Development Center, Nippon Koei Co., Ltd.
  • ICHII Koji
    Graduate School of Engineering, Hiroshima University

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  • 降雨の影響を考慮可能な盛土斜面の動的解析
  • コウウ ノ エイキョウ オ コウリョ カノウ ナ モリド シャメン ノ ドウテキ カイセキ

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Abstract

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.

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