A parameter calibration method in two-surface elastoplastic model for sand-structure interface under monotonic shear loading

Abstract

A new method is proposed to calibrate the key parameters of a two-surface elastoplastic model to simulate the sand-structure interface under monotonic shear loading. A series of DEM simulations, in which a few sand-structure interface parameters and boundary conditions are considered, are conducted to guide the establishment of a calibration method. The simulation results, together with other researchers’ test results, are used to provide semiempirical and empirical equations for parameter calibration using the two-surface elastoplastic constitutive model. Numerical calculations are performed using the new method and the model’s performance is evaluated for dense and loose sands, under constant normal load and constant normal stiffness conditions by comparison with experimental results, which are shown to be in good agreement with the experimental data.