Discussão sobre as metodologias de modelagem de pilares de concreto armado revestidos com PRFC e solicitados por carga excêntrica

Abstract

Studies have currently increased about evaluating the application of carbon fiber reinforced polymers (CFRP) in the confinement of degraded reinforced concrete pillars. CFRP is a material that has stood out due to its excellent mechanical properties and its specific low weight. Performing a structural evaluation is essential, which can be through laboratory tests or computational modeling. Several numerical methods can be used, especially the Finite Element Method. In this case, several types of carbon fiber modeling can be done using shell elements, which can be considered isotropic, orthotropic, or lamina and cross-section considered as composite or homogeneous. This work aims to evaluate the various modeling of the CFRP in reinforced concrete pillars submitted to the eccentric axial load. For this, the ABAQUS® software is used, where the nonlinear concrete material is modeled through the constitutive model Concrete Damaged Plasticity (CDP). Examples from the literature are used, where the results are compared with those of experimental tests. Thus, the use of orthotropic shell elements provides solutions much closer to those of reference, and the section configured as composite is the one that provides the best results.