Experimental Study on Properties of Corroded CFRP Reinforced Concrete Column under Repeating Load

摘要

This paper discusses the use of carbon fiber reinforced polymers (CFRP) wraps as the protection and strengthening techniques for reinforced concrete structures. Four reinforced concrete columns were wrapped with single layer of CFRP sheets before the corrosion initiation. The corrosion was induced by means of an impressed direct current. The properties of the specimen were studied through the different wrapping schemes and corrosion degrees under the axial pressure and cycle bending loads supplied by the material test system (MTS). Results showed that the application of CFRP sheets was efficient in protecting RC columns from corrosion. It was found that the corrosion degree related to the areas of CFRP wraps, while the fatigue life and the ductility of specimens strongly connect with wrapping scheme and corrosion damage.