Bearing capacity of concrete-filled steel tube column sections under long-term loading

Abstract

This article presents the design methods for concrete filled circular columns subjected to long-term axial compression and bending. There are two approaches: stress-based and strain-based for formulations. Both approaches are specified in Russian Code, SP 266.1325800.2016, and in European Code, EN 1994-1-1:2004. A numerical example shows the procedures to calculate the strength of a given column according to two different Codes, the influence of parameters such as steel contribution ratio, relative slenderness to the results in two methods are consider.