Mechanical behaviour prediction of the hybrid composite rebars for concrete structures based on micromechanical approach
Abstract
Composites are one of the modern materials, which alter conventional metal structure in various applications. Fiber Reinforced Polymers (FRP) are characterized in mechanisms other than isotropic structures such as fiber breakage, delamination or matrix cracking. Hybridization of the reinforcement in the composite structure provides to achieve additional positive effect of various fibers application, which cannot be estimated by common Rules of Mixture. Composite rebars are one of the modern application, where FRP materials are a substitute for steel reinforcement. Prediction of the ultimate tensile strength in the unidirectional FRP structure and verifying various hybrid configuration mechanical behavior is crucial during design of the optimized structure. Currently, the Representative Volume Element (RVE)[1], [2] and analytical models[3], [4] were developed to establish impact of the fiber distribution, voids inclusion or reinforcement hybridization on the mechanical parameters such as strength, stiffness or pseudo-ductility effect.
