Evaluation of Soil Behavior Using Drained Consolidation Tests and Simulation in ABAQUS with Constitutive Failure Models (#2293)

Authors

Ludeña Lozano, Estefanny Angelly Alondra

Abstract

The study evaluates the mechanical behavior of the Baños del Inca soil, Cajamarca, through drained consolidated triaxial (CD) tests and numerical simulations in ABAQUS using constitutive failure models. The results obtained in the laboratory were compared with the Mohr-Coulomb, Drucker-Prager and Modified Cam-Clay models, analyzing the relationship between shear and normal stress, pore pressure and volumetric change. The results show that ABAQUS predicts values ​​slightly higher than the experimental ones, with differences of 2-5%. In terms of shear strength, the triaxial test reported cohesion values ​​of 30.5 kPa and a friction angle of 22.5°, while in ABAQUS the values ​​were 32.1 kPa and 23.8°, respectively. Drucker-Prager overestimated the shear strength by 8-10%, while Modified Cam-Clay better represented the secondary consolidation, with a difference of 1.5-3% with respect to the experimental values. Regarding the pore pressure, the maximum values ​​recorded were 40.5 kPa in the laboratory and 42.1 kPa in ABAQUS, while the maximum volumetric reduction was -23.6 cm³ in the laboratory and -24.2 cm³ in ABAQUS. The research validates the use of numerical models to estimate soil strength and highlights the importance of a correct calibration of the geotechnical parameters for their application in infrastructure projects.