Análise numérica de viga de concreto armado considerando não-linearidade física e corrosão das armaduras

Abstract

Structures are subject to various deterioration mechanisms, such as corrosion of reinforcement, which is referred to the concentration of chloride ions on its surface, putting at risk the useful life, stability and safety of the structure, since it acts directly on the steel reducing its area and affecting the strength of the structure. This work aims to evaluate, through numerical analysis via the Finite Element Method, a reinforced concrete beam considering different uniform corrosion scenarios. The corrosion rate values used are empirical and based on Faraday's laws. The results showed that as the beam loses its steel area, whether in longitudinal or transverse reinforcements, the resistant capacity decreases and, therefore, the main stresses, the number of cracks and the magnitude of displacements increase.