Abstract
The present paper makes the important part of a series of study on the earthquake-proof design method and the examination method for aseismicity of slopes and earth structures. The failure case and the adjoining non-failure case of embankments and slopes under the actual earthquakes are inversely analized. As a result, the distributions of the seismic coefficient κ which can significantly distinguish the failure and the non-failure cases in the statistical meaning are obtained. In addition, the attenuation equations are investigated by the regression analyses of the measured maximum ground accleration α and the (κ-α) relationships for design and examination are proposed. The methodology to judge the degree of safety under earthquake is also shown.
