SHEAR STRENGTH OF CIRCULAR CONCRETE BEAMS REINFORCED WITH GFRP
This paper presents the results of an investigation of the shear strength and behavior of three circular concrete beams reinforced with glass FRP (GFRP) bars and spirals. The beams, which measured 3,000 mm in length by 500 mm in diameter, were tested under four point bending. The test parameters included the GFRP spiral reinforcement ratio (different spiral spacings [150 and 200 mm] and spiral diameters [13 and 15 mm] As designed, the beams failed in shear due to GFRP spiral rupture. The test results indicated that the higher the GFRP spiral reinforcement ratio, the higher the enhancement of the shear strength due to the confinement, which controls shear cracks and improves aggregate interlocking.