NUMERICAL ANALYSIS OF THE BEHAVIOR OF CONCRETE COLUMNS CONFINED WITH CFRP USING THE CONSTITUTIVE MODEL CONCRETE DAMAGED PLASTICITY

Resumo

The use of carbon fiber reinforced polymers (CFRP) in the reinforcement of concrete structures was
consolidated in civil construction due to its excellent mechanical properties and low specific weight. In this context,
this article aims to present numerical simulations in finite elements of columns reinforced externally to the CFRP,
submitted to centralized compression. The simulations were developed considering the physical non-linearity of
the concrete through the constitutive model Concrete Damaged Plasticity (CDP), based on plasticity and damage
to the material. The numerical models were calibrated with data from experimental tests and indicated good
compatibility of forces and axial displacements. The distribution of the compression stresses indicated that for
the case of centered force the circular columns present uniform confinement, while in the prismatic columns the
confinement is concentrated close to the rounded corners. The reinforcement efficiency in the resistance gain for
different column cross sections was proven.