Abstract
The purpose of the present paper is to propose a methodology of the seismic risk analysis of slopes and earth structures based on the seismic coefficient. First, attenuation study of peak acceleration for various earthquakes in Japan is made and this shows noticeable scatterness depending upon the region of the earthquake. Second, the records of about twenty thousands earthquakes which occured in Japan are investigated to determine the area of “earthquake nest” and Gutenberg-Richter's equation is given for each “earthquake nest.” These results are incorporated with the seismic risk analysis assuming the circular seismic source and poisson process as a seismic source model. The actual cases are analysed by the proposed method and they show the validity of the method to distinguish the failure case and non-failure case.
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