Simplified analysis of filled steel tubular stub columns under compression

Abstract

As a sequel to previous experimental studies, this paper gauges the applicability of available analytical formulations e.g. those specified in various national codes, for the evaluation of compressive strength of filled steel tubular stub columns (FST), filled with unconventional polymer-based fill materials. In conjunction with experimental results, it is deduced that current national codes either underestimate or overestimate the strength of filled steel stub columns. Instead, a simple summation of the strength of components forming the composite section is found to rationally predict the stub column strength. However, continued research is still required to accurately predict the effects of confinement, on the steel tube and on the fill material, hence expressions for the proportion of load resisted by each component.



Journal of Civil Engineering, JKUAT (2001) Vol 6, 133-144