Hybrid Frp Rebars for Rc Beams Numerical and Experimental Study
Abstract
The aim of the study was to conduct an experimental and numerical analysis of a new type of hybrid FRP reinforcing bars, combining glass, carbon, and basalt fibers, used as the main reinforcement for concrete beams tested under bending. The reinforced concrete beams were designed using three types of reinforcement: commercially available GFRP bars, steel bars, and the developed hybrid. A total of 23 specimens were tested under monotonic loading in a four-point bending setup. The numerical analysis employed the SIMULIA Abaqus software using the Concrete Damage Plasticity (CDP) model, which captures nonlinear behavior, cracking, and strength degradation in concrete. The geometry and boundary conditions in the simulations replicated the experimental setup, including supports, loading method, and placement of reinforcements. Material properties were based on experimental and literature data. The hybrid reinforcement was modeled as linear-elastic, and interactions with concrete were included via embedded regions. The simulations effectively reproduced experimental behavior, validating the model and enabling further analysis of hybrid-reinforced concrete beams.
