Análise numérica de vigas de concreto armadas com barras de fibra de vidro (GFRP)

Abstract

The use of glass fiber bars (GFRP) as reinforcement for concrete in conventional structures has shown an increasing growth in countries like United States of America, Canada and England. Plenty of that is due to the advantage these present when compared with steel, like high tensile and corrosion strength, besides the lower maintenance costs. These factors led researchers to conduct ever more studies on the properties of this type of material, using experimental and computational methods to predict its behavior. This work has the use of computational modeling as a tool to simulate the behavior of concrete beams reinforced with steel and glass fibers bars as its main objective. The featured analysis is conducted using the finite element method (FEM), using the software ABAQUS to process the developed model. For this, all necessary parameters were collected and calculated, and then the beams were modeled for simulation. The numerical results obtained were compared with the experimental results for the beams submitted to the four-point bending test. The simulation results showed acceptable behaviors and differences when compared to the experimental results. Besides, despite the lack of more complete parameters for the fiberglass bars, the Concrete Damage Plasticity (CDP) model used in the simulations proved to be quite efficient.