Avaliação da influência da temperatura no dano do concreto via modelagem computacional

Abstract

Concrete is a diffused material used worldwide mainly because of its relatively low cost, not requiring labor with a high level of qualification for its obtaining, the possibility of being mol-ded in forms when in fresh state and their relative fire resistance. However, the prediction of the behavior of this material, especially when subjected to certain conditions of loading and tem-perature is quite complex, since in these cases microstructural changes occur that reflect in its macroscopic structure. In this context, it is necessary to use computational tools that allow the simulation of structures with their imposed requests. In order to contribute to this scenario, this work intends to simulate the thermomechanical behavior of the concrete when it is exposed to high temperature gradients, and to understand how the degradation process of the material oc-curs in these cases, using experimental data provided by Cergy-Pontoise University, in France. It is also intended to verify how the granulometry of the aggregates influences this process. For this, we will use the Abaqus finite element commercial program, which allows the user, through the use of the subroutines, to describe specific constitutive models of materials, incorporating the requirements of a particular problem.