In collaboration with Sheng Zeng and Mahdi Taiebat from the University of British Columbia (UBC), we have extended our automatic calibration software numgeo-ACT for advanced constitutive models by integrating the SANISAND-MSf model and applying it to challenges in seismically induced soil liquefaction.

Our approach uses a two-stage optimization process: first, parameters governing the monotonic response are optimized using monotonic test data, and then refined using cyclic test data. With the help of the DEEM algorithm (Differential Evolution with Elitism and Multi-populations), calibration time and the required expertise are significantly reduced. Validation against an extensive experimental database of Ottawa F65 sand shows excellent agreement with experimental results.

The application of the calibrated parameters in the simulation of complex centrifuge tests on a saturated slope and a sheet-pile-supported excavation under seismic loading demonstrates the numerical robustness of the calibrated parameters and very good consistency with the model tests.

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