The effect of length and inclination of carbon fiber reinforced polymer laminates on shear capacity of near?surface mounted retrofitted reinforced concrete beams

This study undertakes a comprehensive investigation of the shear behavior reinforced concrete (RC) beams strengthened by near surface mounted (NSM) carbon fiber polymer (CFRP) laminates. Different strengthening configurations were employed varying length and inclination angle CFRP Results indicated that NSM-CFRP increased load-carrying capacity, ductility, stiffness, toughness from 8% to 41%, 9% 78%, 24% 159%, 22% 254%, respectively. also confirmed as laminate decreases, efficacy process increases, where improved 19%, 10% 21%, 68%, 26% 119%, Also, comparative results revealed specimens with 45°-inclined laminates versus those vertical had higher capacity (2%–10%), ductility (1%–35%), stiffness (24%–40%), (13%–32%). Two analytical formulations predict contribution possible distinct for resistance RC considered. an agreement between experimental both formulas, average values safety factor, k, 0.80 0.73, corresponding standard deviation 0.195 0.125,