Experimental behaviour of high performance concrete-filled steel tubular columns

In recent years, the utilization of high performance concrete has been the interests of the structural engineers and researchers. As a high performance concrete, self-consolidating concrete (SCC) is a highly flowable concrete that can fill formwork without any mechanical vibration. SCC's unique property gives it significant economic, constructability and engineering advantages. The aim of this paper is thus an attempt to study the possibility of using thin-walled hollow structural steel (HSS) columns filled with very high strength SCC. Tests on 28 HSS columns filled with very high strength SCC were conducted, where the main parameters varied are: (1) section types, circular and square; (2) slenderness ratio, from 12 to 120; and (3) load eccentricity ratio, from 0 to 0.6. Comparisons are made with predicted column strengths using the existing codes such as AISC, EC4 and DBJ13-51-2003.