Behavior of Concrete Beams Reinforced with Hybrid Steel and FRP Composites

This paper presents a nonlinear finite element model to investigate the behavior of hybrid Fiber Reinforced Polymers (FRP) and steel reinforcement. Different types of FRP, specifically CFRP and GFRP, were used alongside steel rebars in concrete beams. The study was conducted using the finite element program "ANSYS". Nonlinear material models for the components of the concrete beam were utilized in the three-dimensional finite element models. The outcomes derived from finite element analysis were validated against experimental results. A comprehensive parametric study was conducted to explore the effect of replacing steel reinforcement with different types of FRP bars. The study demonstrated that the contribution of steel rebars to FRP rebars in concrete beams improved beam ductility and mitigated the unfavorable brittle failure of the concrete beam.