Liquefaction susceptibility of non-plastic silty sands using hypoplastic model simulations

Abstract

ABSTRACT A detailed numerical analysis was performed on sands and non-plastic silty sands to examine the soil behaviour under triaxial loading conditions. An advanced hypoplastic soil element model has been used for the numerical simulations. The model parameters are constant for the given soil material and are determined easily by using mathematical formulations after conducting the basic experiments in the laboratory. The numerical model is validated with experimental data of triaxial tests before performing the numerical investigations. It is aimed to study the liquefaction resistance of sand and silty sands based on the critical state line (CSL), steady state line (SSL) and stress ratio at 20% failure strain under static loading. Results indicate that as the fines content increases, the CSL or SSL shifts to downwards, i.e., dilation decreases within the given range of pressures which indicate that the liquefaction susceptibility of sand increases with the addition of the fines content.