Flexural behaviour of hybrid reinforced concrete beams using FRP bars - A critical review

In general, Reinforced Concrete structures exposed to much vulnerable climate leads to corrosion of the steel reinforcement, which results the huge loss of durability, serviceability. Carbonation or chlorides are the reasons of corrosion in reinforcement of steel. Carbonation is the reaction of carbon dioxide in the air with calcium in the concrete. Hence, Fibre Reinforced Polymer rebars which is resistant to corrosion can be replaced with steel reinforcement. So, from the past decade, many researchers are studying the usage of FRP rebars as they are anti-corrosive, high tensile strength, non-magnetic, lightweight, high temperature resistant, low maintenance, and durable. The FRP rebar has the disadvantage of possessing the low ductility and it is not able to bend in required shape. Hence, the hybrid reinforcement is introduced in the concrete structures to enhance the ductility and corrosion requirements. This paper will give brief review on specific application of FRP bar in terms of cost effectiveness, ductility, load carrying capacity and failure modes.