Numerical Investigation of the Behavior of Concrete beam Reinforced with FRCM and TRM Composites

Reinforcement of cement-based matrix composites with TRM and FRCM fibers have been utilized to improve the behavioral performance of reinforced concrete beams subjected to destruction in the past decades. Reinforcement and strengthening of the structural surfaces requires the use of fibers and mortar to link between them. The complexity of the interfaces between the fibers and matrix does not allow a simple and accurate model. This research created a numerical analysis approach based on the measuring and evaluating of the strength capabilities of two TRM and FRCM composites under the influence of bending stress conditions in terms of strengthening the external surfaces of the structure. In this regard, six sections of reinforced concrete beams with FLAT, STRIP and U-shaped patterns reinforced by TRM and FRCM composites under three-point loading and one beam were considered as reference. For this purpose, the impact of the link mechanism and bending moment, ultimate load capacity, energy absorption and dissipation, elastic stiffness and finally using the β reduction factor, the ultimate moment and yield stress were calculated by Abaqus software. According to behavioral results, reinforced sections with different FRCM composite patterns exhibit about 18% better performance than TRM composite.