Remarks on numerical simulation of the LEAP-Asia-2019 centrifuge tests

Prototype and physical scale numerical models were created using OpenSees to simulate centrifuge experiments representing a sloping ground condition in accordance with LEAP-Asia-2019 guidelines. The PM4Sand constitutive model calibrated for Ottawa F65 sand was used. Simulated results showed reasonable agreement between prototype and physical centrifuge test scale models. Modeling fundamental characteristics of the centrifuge experiment, e.g., direction of shaking relative to the axis of centrifuge, was found to be an important factor in achieving a better match between numerical and experimental results for the simulation of the prototype model. A preliminary study on the use of generalized scaling laws showed that models with higher initial stresses predict larger lateral displacements. Additionally, examination of stress histories recorded in simulations and experiments indicated higher cyclic stress ratios and static shear stresses are required for proper calibration of constitutive model parameters.

Automated summary

The study utilized OpenSees to simulate centrifuge experiments, finding reasonable agreement between models. It was discovered that modeling fundamental characteristics of centrifuge experiments is crucial for better matching results. Preliminary research showed that models with higher initial stresses predict larger displacements.