Experimental study of square RC columns confined with CFRP composites using CSB technique under eccentric loading

Alireza Saljoughian¹ Davood Mostofinejad²

1) Ph.D. Student, Department of Civil Engineering, Isfahan University of Technology (IUT) Email:
2) Professor, Department of Civil Engineering, Isfahan University of Technology (IUT) Email:

Publication : International Conference on Science and Engineering(2icesconf.com)
Abstract :
Abstract It is the objective of the current study to investigate the effect of the recently developed corner strip-batten (CSB) technique on square columns confined with carbon fiber reinforced polymer (CFRP) sheets. In this technique, CFRP battens do not experienced any curvature in confining the section but are stretched as completely flat strips similar to flat coupons. For the purposes of this study, 4 square reinforced concrete (RC) columns, each with a cross section of 133 × 133 mm and height of 500 mm, were subjected to load eccentricities of zero and 30 mm. The experimental results demonstrated that confining battens in the new method of corner strip-batten are uniformly stretched under the tension stresses of confinement; therefore, more uniform distribution of confining pressure on section occurs and stress concentration at corners is eliminated. Thus, compared to unconfined RC columns, square RC columns confined through the CSB technique exhibit improved performance in terms of enhanced load carrying capacity and ductility under eccentric loading.
Keywords : Corner strip-batten CFRP Square RC column Eccentric loading