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FROM:
M. Anbarasu (1) and M. Adil Dar (2)
(1) Department of Civil Engineering, Government College of Engineering, Salem, 636011, Tamil Nadu, India
(2) Department of Civil Engineering, Indian Institute of Technology Delhi, New Delhi, 110016, India
“Improved design procedure for battened cold-formed steel built-up columns composed of lipped angles”, Journal of Constructional Steel Research, Vol. 164, Article 105781, January 2020, https://doi.org/10.1016/j.jcsr.2019.105781
ABSTRACT: The present paper reports the numerical parametric study on the structural behaviour of battened cold-formed steel built-up box columns composed of four lipped angles. The validated numerical model with the experimental results reported by the author in the comparison paper was employed to carry out parametric studies to produce numerical data over a wider range of global column slenderness by varying the sectional compactness of the lipped angle section, batten spacing, and global column slenderness. The numerically derived results were employed to check the accuracy of the current design rules. The results of the assessment revealed the limitation of the current design rules in the prediction of the capacity of the CFS built-up battened box columns, which was mainly associated with the influence of unbraced chord slenderness and interconnector stiffness on the buckling behaviour. Therefore, improved design procedure was proposed in the framework of AS/NZS specifications (AS/NZ 4600:2018) and European standards (EN1993-1-3:2006) for the safe, less scattered and reliable design strength predictions of battened CFS built-up columns composed of four lipped angles.
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