The effectiveness of externally bonded sprayed glass fiber reinforced polymer (Sprayed GFRP) in shear strengthening of RC beams\r\nunder quasi-static loading is investigated. Different techniques were utilized to enhance the bond between concrete and Sprayed\r\nGFRP, involving the use of through bolts and nuts paired with concrete surface preparation through sandblasting and through the\r\nuse of a pneumatic chisel prior to Sprayed GFRP application. It was found that roughening the concrete surface using a pneumatic\r\nchisel and using through bolts and nuts were the most effective techniques. Also, Sprayed GFRP applied on 3 sides (U-shaped) was\r\nfound to be more effective than 2-sided Sprayed GFRP in shear strengthening. Sprayed GFRP increased the shear load-carrying\r\ncapacity and energy absorption capacities of RC beams. It was found that the load-carrying capacity of strengthened RC beams was\r\nrelated to an effective strain of applied Sprayed GFRP. This strain was related to Sprayed GFRP configuration and the technique\r\nused to enhance the concrete-FRP bond. Finally, an equation was proposed to calculate the contribution of Sprayed GFRP in the\r\nshear strength of an RC beam.
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