Tests on inclined, tapered and STS concrete-filled steel tubular (CFST) stub columns

This paper is an attempt to study the behaviour of the inclined, tapered and straight-tapered-straight (STS) concrete-filled steel tubular (CFST) stub columns. A total of 34 specimens were tested. The main parameters were the column type (inclined, tapered and STS), inclined or tapered angle (from 0°to 9°) and the cross-sectional type (circular and square). Comparisons with predicted cross-sectional strengths were made using the existing codes: AIJ-2008, AISC-2005, BS5400-2005, DBJ-13-51-2003 and EC4-2004.