Reliability analysis of CPT and SPT probabilistic Bayesian models for liquefaction

Liquefaction is a phenomenon wherein soil loses large percentage of its shear strength and stiffness,when subjected to earthquake shaking or other rapid loading. Several field tests such as cone penetrationtest and standard penetration test are used to estimate soils liquefaction. There are uncertaintiesassociated with the various seismic demand and soil resistance variables. Recently several models aredeveloped to implement these uncertainties using Bayesian method. In this research two famousprobabilities of liquefaction Bayesian models based on standard penetration test and cone penetrationtest are considered. The safety factors are calculated in all condition for two models utilizing cyclicresistance ratio in the same situation. The results show the Bayesian model based on standardpenetration test is reliable than cone penetration test.

Keywords:

Bayesian , Liquefaction , Reliability , Cone Penetration Test , Standard Penetration Test