EXPERIMENTAL STUDY OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH A GFRP CHANNEL AND CFRP SHEETS

摘要

Glass-fibre-reinforced polymer (GFRP) jackets were used in several different ways to improve the flexural and shear performance of reinforced concrete (RC) beams. The GFRP jacket increased both the ductility and the strength of the concrete beam. An experimental and analytical study was conducted to investigate the use of the GFRP channel in improving the flexural capacity of a RC wide beam. The parameters investigated in this study were stiffness, ductility and failure mode. The test results showed that using the GFRP channel significantly improved the flexural capacity of the RC wide beams. The tensile stresses due to the inclined cracks in the concrete can be transferred to the concrete on each side of the crack when interfacial bond activities are maintained.