Evaluation of Advanced Constitutive Models for Sand Under Drained and Undrained Cyclic Loading
摘要
Currently available constitutive models for sand are predominantly developed to capture cyclic soil behaviour under either fully drained or fully undrained conditions. In reality, sands often respond in a partially drained manner. The ability of constitutive models to accurately capture behaviour under partially drained conditions remains an open question. This study aims to evaluate the performance of three recent, advanced constitutive models under both drained and undrained conditions, to infer their applicability across the drainage spectrum. The models examined include two bounding surface elastoplasticity models that incorporate an additional memory surface (SANISAND-MS and SANISAND-MSf) and a hyperplasticity model (HySand). The findings elaborate on the specific limitations and strengths of these models in simulating several key aspects of sand behaviour under cyclic loading, by using comparisons with published benchmark experimental results on Karlsruhe fine sand. For undrained conditions, the investigation covers cyclic liquefaction resistance curves and pore water pressure accumulation. For drained conditions, the focus is on strain accumulation. This analysis offers guidance towards selecting suitable constitutive models for simulations of the cyclic response of sand and indicates directions for future work to improve partially drained modelling capabilities.