Numerical modeling of fiber reinforced concrete beams using ANSYS

This paper provides a numerical analysis of reinforced concrete and fiber-reinforced concrete beams under a static loading using ANSYS Mechanical. The chief aim is to compare the stress-strain condition, crack formation, deformation behavior, and load-bearing ability of the ordinary reinforced concrete beams with beams reinforced with steel and basalt fibers. The three-dimensional finite element models have been developed with the consideration of the real beam geometry, nonlinearity of the material behavior, reinforcement action, and the boundary conditions. It was a model of concrete and fiber-reinforced concrete where the proper physical and mechanical properties were used, and the reinforcement was described with the help of an ideal elastic-plastic model. The quantitative findings indicate that fiber reinforcement enhances crack resistance, narrows crack width, and augments ultimate bending capacity of the beams. One of the series studied, a specimen with 100 percent steel fiber reinforcement, gave a high bending moment of 21.42 kN·m, as compared to 15.86 kN·m with the normal reinforced concrete beam, or a 35 percent increase. The findings support the idea that the dispersed fiber reinforcement can play an important role in promoting the structural performance of reinforced concrete beams and can be successfully implemented in engineering practice.

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