On the advanced analysis of steel frames allowing for flexural, local and lateral-torsional buckling

Chan, S.L. & Iu, C.K. (2006) On the advanced analysis of steel frames allowing for flexural, local and lateral-torsional buckling. Steel Structures, 6, pp. 121-127.

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Detailed procedure for second-order analysis has been coded in the newest Eurocode 3 and the Hong Kong steel code (2005). The effective length method has been noted to be inapplicable to analysis of shallow domes of imperfect members exhibiting snap-through buckling, to portals with leaning columns and others. On the other hand, the advanced analysis is not limited to buckling design of these structures. This paper demonstrates its application to the design of a simple plane sway portal and a three diminsional non-sway steel building. The results by the advanced analysis and the first-order linear analysis are compared and the technique for practical second-order analysis steel structures is described. It is observed that the use of a straight element by itself cannot model the buckling resistance of columns governed by different buckling curves for hot-rolled and cold-formed sections of various shapes like I, H, hollow etc. Also the curvature of the conventional cubic Hermite element is not varied by the external axial force and thus it cannot simulate the response of a buckling column. Thus its use for second-order analysis is basically unacceptable. A technique for additional checking of beams undergoing lateral-torsional buckling is also suggested making the advanced analysis a complete design tool for conventional steel frames.

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ID Code: 67080
Item Type: Journal Article
Refereed: Yes
Additional Information: Journal title changed to "International Journal of Steel Structures" in 2009 and published by Springer since then.
Additional URLs:
Keywords: lateral-torsional buckling, second-order, steel structures, frame analysis
ISSN: 1598-2351
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Australian and New Zealand Standard Research Classification > BUILT ENVIRONMENT AND DESIGN (120000) > ENGINEERING DESIGN (120400) > Engineering Design Methods (120403)
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 10 Feb 2014 00:42
Last Modified: 10 Feb 2014 00:43

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