Abstract
Liquefaction is a lost of shear strength phenomenon in saturated sandy soil due to excess pore water pressure during earthquake shaking. Several factors influencing liquefaction are relative density of sand, grain size, ground water level, magnitude of earthquake, and earthquke shaking duration. The experimental study using shaking table was performed to investigate liquefaction potential. Soil sample is sandy soil with relative density (RD) less than 33% and can be categorized as loose sand. The dyanmic modelling in this experimental study included peak ground acceleration (PGA) of 0.4g, shaking duration of 32 sec, and vibrational frequency of 1.4 Hz; 1.6Hz, and 1.8Hz. The parameter used to determine liquefaction in this study is excess pore water pressure ratio (ru), which reflects that liquefaction could happen if ru > 1 and vice versa. The result show that the applied loads were able to trigger liquefaction in sandy layer. Besides, the liquefaction duration and ru max tend to increase when the vibrational frequencies increase.
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