Load-carrying capacity and application of locally buckled hollow section stub

Abstract

The hollow section column subject to local plate buckling is analyzed by employing a finite shell element model. The finite-shell element method with a 4 nodes 24 DOFs shell element is used to study the ultimate load-carrying capacity of a hollow section stub subjected to plate local buckling. After a detailed parameter analysis, three design formulas are proposed for three loading conditions, and the following conclusions can be made: the plate components width-thickness ratio and the section aspect ratio have a great effect on the ultimate load-carrying capacity of the hollow section stub; when the plate components suffer local buckling, the correlation between flange and web local buckling has a significant influence on the ultimate load-carrying behavior of the hollow section stub; compared with a Chinese specification, the formulas proposed in the chapter are more economic and accurate, and are expressed directly as the function of column width-thickness ratio and section aspect ratio. It is convenient for designers without being involved determine the plate effective width.