Aplicação do método das diferenças finitas energéticas na modelagem do concreto reforçado com fibras curtas de aço sob flexão

• Main Author: Neves, Júlia Barbosa
• Publication Date: 2013
• Format: Master thesis
• Language: por
• Source: Biblioteca Digital de Teses e Dissertações da UEFS
• Download full: http://localhost:8080/tede/handle/tede/167
• topic: Concreto reforçado com fibras de aço; modelo de dano de Mazars; teoria clássica de laminados; método das diferenças finitas energéticas; finite difference energy method; Steel fiber reinforced concrete; Mazars damage model; classical lamination theory; ENGENHARIAS

The prediction of the reinforced concrete beams behavior under bending is essential to design these elements. Usually the models do not incorporate the concrete stress contribution, which may underestimate the structural element strain that use steel fiber reinforced concrete (SFRC) under permanent or temporary loads. This work presents a variational formulation based on the finite difference energy method (EFDM) in predicting the flexural behavior of concrete beams reinforced, that uses SFRC. The proposed model uses the classical lamination theory (CLT) with a damage model (Mazars, 1984) applied to the SFRC. The reinforcement was considered as a layer of a perfect elastic-plastic material. Comparing the load-displacement numerical results with those of the literature to reinforced concrete beams demonstrates the consistency of the proposed model.