Improved design rules for cold-formed steel columns

Gunalan, Shanmuganathan & Mahendran, Mahen (2013) Improved design rules for cold-formed steel columns. In Liew, R.J.Y. & Lee, S.C. (Eds.) Proceedings of the 10th Pacific Structural Steel Conference (PSSC 2013) – Advancements and Achievements in Structural Steel, Research Publishing, Singapore, pp. 224-230.

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Current design rules for determining the member strength of cold-formed steel columns are based on the effective length of the member and a single column capacity curve for both pin-ended and fixed-ended columns. This research has reviewed the use of AS/NZS 4600 design rules for their accuracy in determining the member compression capacities of slender cold-formed steel columns using detailed numerical studies. It has shown that AS/NZS 4600 design rules accurately predicted the capacities of pinned and fixed ended columns undergoing flexural buckling. However, for fixed ended columns undergoing flexural-torsional buckling, it was found that current AS/NZS 4600 design rules did not include the beneficial effect of warping fixity. Therefore AS/NZS 4600 design rules were found to be excessively conservative and hence uneconomical in predicting the failure loads obtained from tests and finite element analyses of fixed-ended lipped channel columns. Based on this finding, suitable recommendations have been made to modify the current AS/NZS 4600 design rules to more accurately reflect the results obtained from the numerical and experimental studies conducted in this research. This paper presents the details of this research on cold-formed steel columns and the results.

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ID Code: 60678
Item Type: Conference Paper
Refereed: Yes
Keywords: Design rules, Cold-formed steel, Column, Warping restraint
ISBN: 978-981-07-7137-9
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 The authors
Deposited On: 11 Jun 2013 04:22
Last Modified: 24 Apr 2014 09:37

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