A simplified procedure for FE analysis of an earth dam under seismic loading
A simplified procedure for FE analysis of an earth dam under seismic loading
The behaviour of an earth dam under seismic conditions can be predicted by geotechnical engineers using a variety of numerical tools. This study performs the finite element (FE) analysis of an earth dam subjected to seismic ground motion. The choice of material constitutive model is critical in any numerical analysis as it should correctly simulate the soil behaviour under earthquake loadings. The current study proposes a simplified technique to avoid complicated user-defined material models. The shear modulus reduction of geomaterials under seismic loadings is introduced into the elastoplastic Mohr-Coulomb model available in the FE software ABAQUS using the user-defined field variable interface. By calibrating the damping of the model with the help of Rayleigh damping, the current numerical results are found to be in good agreement with those recorded using instruments and reported by other researchers using an advanced geotechnical engineering software. To reinforce the applicability of the proposed technique, the analysis is done with varying solver types and flow rules. Good and comparable results are obtained in all cases.
A. Choudhury; P. GHOSH; S. K. Mishra
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
B - Geohazards
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