EXPERIMENTAL STUDY OF SHEAR BEHAVIOR OF CFRP-STRENGTHENED REINFORCED CONCRETE DEEP BEAMS

Abstract

The purpose of this article is to study the behavior of deep concrete beams reinforced with carbon fiber reinforced polymer (CFRP) sheets, with the variables being the reinforcement configurations with CFRP sheets and the ratio of shear span to depth. The study was conducted using 6 deep beams with cross-sectional dimensions of 200 mm wide, 2400 mm long, and 450 mm deep. Among these, 2 beams served as control specimens, while 4 beams were strengthened with CFRP sheets. The reinforced beams were divided into 2 types, each with 2 layers of reinforcement: strip reinforcement and U-shaped reinforcement. The test results showed that external reinforcement with CFRP sheets improved load-bearing efficiency. Strip reinforcement demonstrated higher load-bearing efficiency compared to U-shaped reinforcement, attributed to debonding between the beam and the reinforcement material.