Experimental Investigation on Flexure Strength of Doubly Reinforced Concrete Beams Using Externally Bonded Carbon Fiber-Reinforced Polymer Plates

Abstract

An experimental investigation for simply supported doubly reinforced concrete beams and strengthened in flexure with externally bonded carbon fiber-reinforced polymer plates to the tension face of concrete where both ends of the CFRP plate have been fully wrapped to prevent the premature failures due to plate-end interfacial debonding between a CFRP plate and a concrete beam or separation of concrete covering, loaded by monotonically increasing symmetrical loads is presented in this paper to determine the load carrying capacity and deflection response. The interested parameters consisting of concrete compressive strengths and the positions of loading that effected to the first cracking load, yielding load, debonding load, ultimate load, and alsofailure mode are considered.