Theoretical modeling for predicting the axial compressive capacity of reinforced concrete columns with corroded reinforcement strengthened by carbon textile reinforced concrete

Abstract

Nowadays, Textile Reinforced Concrete (TRC) is one of the effective solutions used to strengthen reinforced concrete (RC) structures whose load-carrying capacity has been reduced due to corrosion, especially for primary structural members such as columns, beams, and slabs. In Vietnam, studies on corroded RC columns strengthened with TRC are still limited. This paper presents a theoretical model for predicting the axial compressive load-carrying capacity of corroded RC columns strengthened with carbon fiber TRC, taking into account the effects of steel corrosion. The calculated results from the theoretical model are validated against experimental results obtained from concentric axial compression tests on column specimens. The specimen groups include: uncorroded control RC columns, corroded RC columns without strengthening, and corroded RC columns strengthened with carbon fiber TRC. The theoretical model shows good agreement with the experimental results, with a relatively small deviation (less than 5%), indicating the high reliability of the proposed model.