Probabilistic Liquefaction Hazard Analysis In Japan

Authors have been proposed a method of evaluating the probabilistic liquefaction hazard based on measures of ground surface settlement. The fundamental approach was to calculate how much a particular location would settle, and with what probability, based on the location, magnitude, and probability of occurrence of all possible earthquakes. Generally, the structural damage by liquefaction is mainly causes by ground settlements. Thus, the liquefaction hazard indicated by the ground settlement is more directly to catch on the linkage between the damage and the liquefaction hazard. The settlements of ground surface are calculated from the relationship between the factor of safety for liquefaction (FL value) and post-liquefaction volumetric strain. In this study, we attempt to evaluate a probabilistic liquefaction hazard based on the historical records. Basic concept is comparison between the evaluated liquefaction hazard results and the hysteresis of liquefaction phenomenon.