Strength of Slender Square Tube Columns Filled with High-Strength Concrete

Abstract

An experimental study of the behavior of concrete filled steel tube columns and results of an elasto-plastic analysis are presented. Eighteen columns with square sections were tested under concentric or eccentric loading. Effects of key parameters such as buckling length-section width ratio, LkJD, and eccentricity of the applied axial load were studied. The test results correlate well with both the results of the elastoplastic analysis and Recommendations for Design and Construction of CFT Structures.