Various studies have been conducted to expand knowledge of the structural behavior of fiber-reinforced concrete (FRC), making it as a potential alternative to conventional reinforced concrete in specific applications. The addition of fibers to the concrete matrix primarily enhances the tensile behavior of plain concrete, improving its resistance to bending and shear forces, as well as its ductility and toughness. These characteristics are directly related to the fact that once fibers are embedded and bonded to the cementitious matrix, they hinder the initiation and propagation of cracks. A common strategy for investigating the behavior of FRC under bending and shear forces is numerical simulation using the Finite Element Method (FEM). The approach used here explicitly models the fibers as finite elements randomly dispersed within the continuous domain of the concrete. The primary objective is to evaluate the influence of the fiber-matrix interaction on the composite’s response by numerically simulating of a series of experimental tests carried out using the commercial FEM software DIANA FEA®. The results show that the response of the numerical model depends on the properties of the fiber-matrix interface used, as well as on the way the fibers are generated.
