Local buckling resistances of cold-formed high-strength steel SHS and RHS with varying corner radius

This paper reports an experimental and numerical study of the cross-sectional behaviour cold-formed high-strength steel (HSS) square rectangular hollow section (SHS RHS) members. Six stub column tests, six 3-point three 4-point bending tests have been carried out, followed by development accurate finite element (FE) models a parametric study. Based on test FE results, design rules for slender cross-sections in European, American, Australian Chinese standards GSRM method assessed via reliability analyses. A new equation deriving slenderness SHS RHS considering influence corner radius area reduction factors designing S900 (and above) also proposed.