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Traditional steel-reinforced concrete beams are prone to corrosion, necessitating frequent maintenance and repairs. Glass Fiber Reinforced Polymer (GFRP) bars present a promising alternative due to their superior corrosion resistance, high strength-to-weight ratio, and electromagnetic neutrality. This investigation aims to understand the performance characteristics and potential advantages of GFRP in structural applications, particularly in environments prone to corrosion. A series of experimental and analytical tests evaluated, and key parameters such as deflection, stiffness, crack width, and shear strength are analyzed. The results demonstrated that GFRP-reinforced beams exhibit significantly higher deflections and strains post-cracking compared to their steel-reinforced counterparts. This behavior is primarily attributed to the lower modulus of elasticity of GFRP bars and their distinct bond characteristics with concrete. Furthermore, the shear strength of GFRP-reinforced beams was found to be lower than that of steel-reinforced beams, highlighting the need for adjusted design methodologies. The study underscores the necessity for over-reinforcement in GFRP-reinforced beams to achieve adequate flexural stiffness and suggests the potential benefits of hybrid reinforcement, combining GFRP and steel, to improve overall structural performance and ductility.
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