Behavior of Rubberized Concrete-Filled Square Steel Tube Under Axial Loading

Abstract

The purpose of this paper is to investigate the behavior of rubberized concrete-filled steel tube (RuCFST)analytically by using ABAQUS 6.12-1 software for square columns under axial loading. Twelve specimens modeled with various variables which are rubber content as replacement percentage from natural aggregate (0%, 5% and 15%), tube thickness (3mm and 6mm) and columns� length (1.5m and 3.0m). The results showed an adoption model of RuCFST columns subjected to axial force in elastic and plastic properties of steel and concrete gives a good agreement between numerical and references experimental results. Also, the results showed a reduction in column capacity with increasing rubber content. In contrast, the results showed an increase in the columns� compression capacity with increasing the thickness from 3 to 6mm. In addition, columns� lengths have no significant effect on compression capacity, although the corresponding shortening increased with increase column�s length. Keywords: Rubberized concrete, Infilled steel tube, Finite element, Axial loading and ABAQUS.