Axial and Flexural Performance of Discontinuously CFRP Strengthened Circularized and Square RC Columns

Abstract

This study aims to evaluate the effect of the cross-section modification on the performance of square reinforced concrete (SRC) columns discontinuously strengthened with CFRP bands. In line with this research aim, the performance of SRC columns under eccentric and concentric compression was compared with that of circularized square RC (CSRC) columns. Six RC columns with 800 mm height including three SRC columns with 150 mm side length and three CSRC columns with 212 mm diameter were prepared and tested. The test results revealed that SRC columns achieved a substantial enhancement of strength and deformation by applying cross-section modification before strengthening with discontinuous CFRP bands. It was also found that SRC columns received a substantial improvement of deformation and considerable improvement of strength by strengthening with discontinuous CFRP bands.