Abstract

NIETO LEAL, Andrés; CAMACHO TAUTA, Javier Fernando  and  RUIZ BLANCO, Edwin Fernando. Parameter determination for the elasto-plastic models Mohr-coulomb and Hardening soil in clay soils. Rev. ing. univ. Medellín [online]. 2009, vol.8, n.15, pp.75-91. ISSN 1692-3324.

This article presents a research program developed for the evaluation and determination of the Morh-Coulomb model parameters and the Hardening Soil model parameters in clay soils. The metodology includes the analysis of some correlations, basic characterization soil tests and undrained compression triaxial tests carried out on reconstituted soil samples in laboratory (kaolin). From the obtained parameters the behavior stress-strain was simulated in the element finite software PLAXIS, examiningthe performance of the models by comparing the numeric calculation results with the experimental soil behavior. For the sets of considered model parameters, the analysis shows that the computational results have a reasonable agreement with the experimental results, appreciating a better approximation to the behavior described by the tests in the simulations performed with the Hardening Soil model, whose results evidence a better grade of adjustment to the typical hyperbolic relationship of the soil tested. In addition, the concluding results represent an important validation of the methodology program developed.

Keywords : constitutive modeling; elasto-plasticity; Mohn-Coulombmodel; Hardening Soil model; finite elements; PLAXIS.

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