Comparison between Experimental and Finite Element Modeling Data for Triaxial Undrained Cyclic Tests in Compression on HOSTUM Sand

Finite elements modeling data is fitted to the results of experimental undrained monotonic and cyclic isotropic triaxial tests. The model can predict the accumulation strain/stress, and pore pressure in undrained state. For determination of material constants, the first cycle (loading-unloading) is performed step-by-step, using Hardening-Soil model for undrained soil, then for the cycles greater than one, the Behavior of the soil is simulated as a pseudo creep (Soft-Soil-Creep model, here) where the number of cycles N is considered equivalent time. The prediction of model is compared with experimental results from monotonic and cyclic undrained isotropic triaxial tests. Good correlation exists between predicted and experimental response.