Increased Load-Bearing Capacity Of Beam Reinforced By CFRP, GFRP, and AFRP in Concrete Beam

Abstract

Efforts to increase the flexural capacity of concrete beams have been examined in many studies, particularly through the use of composite materials such as FRP. Several types of FRP are widely used for beam strengthening, including CFRP, GFRP and AFRP, each offering different advantages depending on the properties of the constituent fibers. The strengthening procedure using these materials follows the provisions in ACI 440.2R 08. By applying the wrap up method, this study found that CFRP produced the highest improvement in flexural strength at forty eight point two nine percent with three CFRP sheets. GFRP recorded its highest improvement at forty seven point nine seven percent with seven sheets, while AFRP reached forty seven point nine eight percent with the same number of layers. The calculations confirm that CFRP is the most efficient and effective option for increasing beam capacity, followed by GFRP and AFRP. For future work, it would be valuable to examine the long term behaviour of beams strengthened with different FRP systems under varying environmental exposures, to investigate the performance of hybrid FRP combinations, and to evaluate how FRP strengthening interacts with shear behaviour and fatigue loading so that a more complete understanding of structural performance can be achieved.