ANSYS is software well acknowledged by professionals and academics, due to its large range of usage options, offering a number of finite element types, good possibilities of constitutive models and linear and nonlinear analysis of structures in general. For the concrete material, the software uses an elastoplastic model with the Willam-Warnke surface of rupture (1975). However, this model is only available for finite elements that do not offer the possibility of use of the element-embedded model for rebars, demanding a much larger amount of elements to discretize structures. This study is about the development of a computational model using the FEM via ANSYS platform for nonlinear analysis of reinforced concrete beams under plane stress states. The most significant advantage of this implementation is the possibility of using the element-embedded rebar model in ANSYS with its 2D quadratic element PLANE183 for discretization of the concrete together with element REINF263 for discretization of rebars and stirrups, making the solutions more efficient. For representation of the constitutive equations of the steel and the concrete, a proposed model was implemented with the help of the UPF customization tool of ANSYS, where new subroutines were attached to the main program. The numerical results are compared with experimental values for 4 reinforced concrete beams originally tested by Bresler and Scordelis (1963) to validate the proposed model, showing satisfactory results.
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