A STUDY ON PROBABILISTIC EVALUATION OF SOIL LIQUEFACTION By

In the present study, a new method for evaluating annual liquefaction probability was developed based on both Davies and Berrill’s seismic energy dissipation theory and Juang et al.’s limit state methodology. The new method also involves use of the average annual liquefaction probability (AALP) of divided soil layers to represent the AALP at a site. The developed method is illustrated in a case study where the AALP in Yunlin, a town that suffered from widespread liquefaction in the 1999 Chi-Chi earthquake, is assessed and mapped. The results show that high AALP area is located between south of County road No.148 and west of County road No.137, where the AALP is approximately equal to 0.01, indicating the cycle of liquefaction is about 100 years. The distribution of liquefaction probability is also discussed in this paper