Abstract
The present study aims to introduce a nonlinear finite element approach (NLFEA) carried out on repaired concrete members under axially compressive loading. The main objective is to assess the effect of design parameters of FRP stirrups based on various confinement rate. The constitutive materials were modeled according to numerical models embedded in ABAQUS software namely: Concrete Damaged Plasticity model to take into account the nonlinear behavior of compressive and strained concrete, coupled with damage theory to represent the cracks evolution. An orthotropic-elastic model to predict FRP behavior with Tsai-Wu failure criteria is used. Indeed, the proposed approach is validated by experimental models available in the literature. In conclusion, the predicted numerical results for various design of FRP stirrups and damage configurations highlight the promising of used FRP composites in the repair of concrete members in terms of mechanical performances enhancement.
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