Evaluation of the ISA-Hypoplasticity Constitutive Model for the LEAP-2017 Project

摘要

In this work the capabilities of the ISA-hypoplasticity model for the simulation of a sandy material are carefully analyzed. The ISA-hypoplasticity model is based on the hypoplastic model by von Wolfferdorff (1996), extended by the intergranular strain anisotropy (ISA) concept by Fuentes and Triantafyllidis (2015). The model is able to simulate monotonic and cyclic loading, and has been recently modified to consider the cyclic mobility effect. Within this work, a calibration procedure has been conducted to determine the material parameters of Ottawa F65 sand and a set of experiments showing monotonic and cyclic loading has been simulated. This work is embedded within the liquefaction experiments and analysis projects (LEAP), which seeks to assess and improve the current numerical tools for prediction and evaluation of soil liquefaction phenomena.