Estimation of parameters for effective stress analysis to reproduce the liquefaction strength curve and stress path obtained from laboratory tests

Abstract

AbstractEffective stress analysis using liquefaction parameters is often employed for the numerical analysis of soil liquefaction. However, to the best of our knowledge, liquefaction parameters that simultaneously reproduce the liquefaction strength curve and effective stress path have not been reported to date. Herein, we propose a new method to estimate the model parameters used in effective stress analysis: the liquefaction strength and pore pressure curves obtained from laboratory tests are used as targets for inverse analysis. The results confirmed that the parameters obtained by our method could reproduce the liquefaction strength, pore pressure curves, and the effective stress path with high accuracy, which was difficult to achieve using conventional methods.