Fiber-reinforced polymer (FRP), also Fiber-reinforced plastic, is a composite material made of a polymer matrix reinforced with fibers, regarding as a substitute application for steel bars or restressing tendon in reinforced concrete (RC) structures.
FRP has wide applications in civil engineering, particularly in strengthening or seismic retrofit of existing RC structures, due to their high strength-to-weight ratio and high corrosion resistance. FRP can enhance the compressive strength and the ultimate strain of concrete significantly, strengthening flexural capacity, shear capacity of RC beams and confining RC columns.
FRP is used for both circular and rectangular shaped columns but it is more effective in the former shape
Increasing Ductility of Structures Using FRP