Nonlinear Compression Behaviour of Thin-Walled Battened Columns Composed of Steel Angle Sections

The previous research on cold-formed-steel (CFS) built-up compression members has been dominated by-adopting channels as chord members. The use of channel sections as chord members limits the gap extension between the chord members to one direction only. This gives adoption of angle sections as chord elements a better edge over channel sections. However, the little research output available on CFS built-up compression members composed of plain angles indicated early local buckling formation at the initial steps of compressive axial loading. Lipped angle sections can substantially enhance the buckling strength of these columns by prolonging the early local buckling. This study reports a numerically performed on CFS built-up compression members formed with of edge-stiffened angles under concentric compressive loading. Based on global slenderness all the three categories of columns, were studied. Also, the compactness of the angle sections as well as the batten spacing was varied. Lastly, the numerical axial strengths were compared against the current North American Standard (NAS) strengths.