Analysis of Confined Circular Column

Abstract

Traditional steel ties reinforcement cannot provide superior confinement for reinforced concrete (RC) columns due to the constraints on tie spacing and disturbance of concrete continuity. This project presents a practical confinement configuration consisting of single welded wire mash (WWM) layer in additional to regular tie reinforcement. The WWM layer is warped over the longitudinal reinforcement and under the longitudinal reinforcement. The proposed transverse reinforcement, with various volumetric ratios of ties, was investigated in sixty four ciccular short RC column specimens categorized in two groups according to their warping. The specimens were cast in vertical position simulating the construction field and they will be tested under concentric compression till failure. The results indicated that the columns, confined with proposed lateral reinforcement, revealed significant improvement in the strength and ductility. Also, high reduction in ties volumetric ratio with no loss in ultimate load could be achieved by installing the WWM layer.