This paper shows a method of liquefaction risk analysis for a ground using two kinds of earthquake hazard curves. At first, in this method which is based on a concept of risk, a risk index is obtained by adding up the score derived in considering the probability of the liquefaction corresponding to the size of the external force. This risk index becomes one index expressing danger of the ground possesses. Also, the damage is evaluated by considering an influence degree K (P_L) which means a rate of the influence of the liquefaction index to damage when it collapses completely.
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