Ductility behavior of composite fibre reinforced polymer-high strength concrete columns under compression

The paper presents the results of a study on the ductility behavior of composite fibre reinforced polymer- high strength concrete columns under uni-axial compression. The columns had slenderness ratios of 8, 16, 24 and 32. Three types of wrap materials (Chopped Strand Mat GFRP, Uni-Directional Cloth GFRP and Woven Roving GFRP) were used with 3mm and 5mm thicknesses. The columns were tested under monotonic axial compressive loading up to failure. The deflections and axial strain were noted for each load increment. The HSC columns with GFRP wrapping exhibited improved performance in terms of deflection ductility and energy ductility capacity. Regression equation has been proposed for predicting the performance parameters. A better correlation has been observed between the test results and those predicted through the proposed equations.