Numerical modelling of a structure with shallow strip foundation during earthquake-induced liquefaction

Structures with shallow foundations are susceptible to excessive settlement and rotation in the event of earthquake-induced soil liquefaction. Numerical modelling problem remains challenging, due persisting uncertainties regarding dynamic response soil–structure interaction. In this paper, numerical simulations employed study seismic a structure on mat foundation, resting liquefiable sand layer. A coupled hydromechanical analysis is performed employing finite-differences code FLAC2D, non-linear constitutive model PM4Sand. broad set element tests Hostun (widely used centrifuge modelling) for extensive calibration. The calibrated then validated against test results. validation not restricted recorded pore pressure, acceleration time histories, but extends deformation mechanisms extracted from testing through image analysis, allowing an in-depth assessment simulation. Overall, good agreement test. pressure build-up final foundation displacement fields predicted adequate accuracy. Although accumulated displacements well reproduced, failure mechanism fully captured. This discrepancy attributed dissipation-related phenomena, which accurately reproduced analysis.