6TH International Congress on Technology - Engineering - Kuala Lumpur3 - Malaysia (2018-07-19)

Finite Element Modelling Of Face-to-face Built-up Cold-formed Steel Channel Sections Under Axial Load

In this paper a finite element investigation is presented on the behaviour of face-to-face built-up cold-formed steel channel sections under compression. Finite element model includes material non-linearity and geometric imperfections. More than 70 finite element results are presented covering stub to slender columns. The finite element model is validated against the test results, recently reported by the authors. The verified finite element model is then used for the purposes of a parametric study to investigate the effect of screw spacing on axial strength of face-to-face built-up cold-formed steel channel sections. The FE results were compared with the design strengths calculated in accordance with the American Iron and Steel Institute (AISI) and the Australian and New Zealand Standards (AS/NZS). It was found that the AISI & AS/NZS are generally conservative for built-up columns failed through overall buckling, however AISI and AS/NZS are un-conservative by around 8% for built-up columns mainly failed through local buckling.
Krishanu Roy, Tina Chui Huon Ting, Hieng Ho Lau, James B.P. Lim