DISCUSSÃO SOBRE AS METODOLOGIAS DE MODELAGEM DE PILARES DE CONCRETO ARMADO REVESTIDOS COM PRFC E SOLICITADOS POR CARGA EXCÊNTRICA

Resumo

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.