A comparative study of deterministic approach for assessing liquefaction potential

Abstract

SPT-based methods have been developed to evaluate liquefaction potential due to seismic loading. This method was evolved over time modified and updated by some researchers. This paper performed a comparative analysis of deterministic approach for assessing liquefaction potential. The selected case study site is in Taiwan which subjected to the 1999 Chi-Chi Earthquake. Furthermore, the oldest and most well-known method proposed by Seed et al. [3] was selected to identify the liquefaction potential. Moreover, a method from Idriss and Boulanger. [6] in which stated as the most suitable method for a certain case in Indonesia, was also conducted. The recent updated method of Cetin et al. [12] which has considered some seismic parameter from the recent seismic events was also utilized in quantifying liquefaction potential. Despite the fact that liquefaction potential is expressed by the factor of safety in deterministic method, some liquefaction parameters including rd (stress reduction coefficient), CSR (Cyclic stress ratio), (N1)60CS (fines-corrected N1,60 value), and FS (factor of safety) were quantified by these methods and then compared. The results show that rd and CSR calculated by Cetin et al. [12] is lower than that of Seed et al. [3] and Idriss and Boulanger [6]. The FS from Idriss and Boulanger [6] is lower as compared to the two methods; Seed et al. [3] and Cetin et al. [12].