Ambiente teórico computacional unificado para modelos constitutivos: inclusão de modelo de microplanos

Abstract

The physically nonlinear behavior of concrete has been object of many researches which aim, through the formulation of new models or the improvement of the existing ones, representing the material medium of the nearest manner of its constitutive reality. In this scenario, this dissertation investigates the models in which the material behavior is described according to the called Microplane Models. To achieve it, the INSANE (INteractive Structural ANalysis Environment) system, whose numerical core contains the Uni_ed Theoretical-Computational Environment to Constitutive Models proposal by Penna (2011), has been used. Preserving the generic nature of this environment, the model of Leukart and Ramm (2006) has been incorporated on it, considering four equivalent strains, four damage evolution laws, as well as three incremental constitutive tensor approximations. The software project of this incorporation has been conceived in order to enable the future inclusion of any Microplane Models. Numerical simulations allowed evaluating the adequacy of the material parameters, the numerical stability of the model and the proximity of the results with experimental tests available in the literature.