Rubberized Concrete-Filled Steel Tube Behavior under Axial Loading

Abstract

With an increased number of wastes tyres all over the world, there is a growing need to better manage for these waste materials. This paper aims to study the behavior of short and long rubberized concrete-filled steel tube (RuCFST) columns under axial loading numerically. By using ABAQUS 6.12-1 software, twenty-four prototypes were modeled and analyzed with various parameters. These are columns’ length, rubber content as a replacement from natural aggregate, cross-section shape, and cross-section slenderness. The results showed an acceptable agreement in elastic and plastic properties between numerical and referenced experimental results. Moreover, the increasing of column length from 1.5m to 3.0m has a small influence on the compression strength of the columns. Meanwhile, the capacity of columns reduced gradually with increasing the rubber replacement percentage. Although the shape of the columns, square and rectangular, has no significant effect in compression capacity. The compression capacity was found to increase with reduce the cross-section slenderness. The local buckling failure was found in most of the short RuCFST columns, however, the global buckling occurred in most of the long RuCFST columns.