Seminar - Jurgen Becque - Interaction of local and distortional buckling of cold-formed high strength steel

Wednesday, October 27, 2004, 1.10 - 1.50 pm
Civil Engineering Lecture Room 3

Abstract

Stainless steel exhibits a behaviour that is distinctively different from the behaviour of conventional carbon steel, due to its highly non-linear stress-strain relationship with low proportionality limit, anisotropy and significant strain hardening. Therefore, the governing design rules for carbon steel cannot be applied directly to stainless steel.

The objective of this research is to study the interaction between local buckling and overall (Euler) buckling in stainless steel cold-formed sections. In this phenomenon, local buckling will reduce the stiffness of the section due to geometric effects and cause the member to fail in overall buckling at a reduced load.

An experimental program is set up to study interaction buckling in both stainless steel columns and beams. The results are used to verify the existing design guidelines and a direct strength method is developed to complement the existing standards.