Buckling and Torsion of Steel Equal Angle Beams
This article is a reply.
VIEW THE ORIGINAL ARTICLEThis article has a reply.
VIEW THE REPLYPublication: Journal of Structural Engineering
Volume 131, Issue 3
Abstract
Although steel single angle sections are commonly used as beams to support distributed loads which cause biaxial bending and torsion, their behavior may be extremely complicated, and the accurate prediction of their strengths very difficult. Further, many design codes do not have any design rules for torsion, while some recommendations are unnecessarily conservative, or are of limited application, or fail to consider some effects which are thought to be important. This paper is one of a series on the behavior and design of single angle section steel beams. Two previous papers have studied the biaxial bending behavior of restrained beams, a third has studied the lateral buckling of unrestrained beams, and a fourth the biaxial bending of unrestrained beams. In each paper, simple design methods have been developed. In this present paper, an approximate method of predicting the second-order deflections and twist rotations of steel equal angle beams under major axis bending and torsion is developed. This method is then used to determine the approximate maximum biaxial bending moments in such beams, which are then used with the section moment capacity proposals of the first paper of the series and the lateral buckling proposals of the third paper to approximate the member capacities. This method is extended to steel unequal angle beams in a companion paper.
Get full access to this article
View all available purchase options and get full access to this article.
References
British Standards Institution (BSI). (2000). “Structural use of steelwork in building. Part 1:2000. Code of practice for design in simple and continuous construction: Hot rolled sections.” BS 5950, BSI, London.
Farwell, C. R., and Galambos, T. V. (1969). “Nonuniform torsion of steel beams in inelastic range.” J. Struct. Div. ASCE, 95(ST12), 2813–2829.
Pi, Y. L., and Trahair, N. S. (1995). “Inelastic torsion of steel -beams.” J. Struct. Eng., 121(4), 609–620.
Standards Australia (SA). (1998). “Steel structures.” AS4100-1998, SA, Sydney.
Trahair, N. S. (1993). Flexural-torsional buckling of structures, E&FN Spon, London.
Trahair, N. S. (2002a). “Moment capacities of steel angle sections.” J. Struct. Eng., 128(11), 1387–1393.
Trahair, N. S. (2002b). “Bearing, shear, and torsion capacities of steel angle sections.” J. Struct. Eng., 128(11), 1394–1398.
Trahair, N. S. (2003a). “Lateral buckling strengths of steel angle section beams.” J. Struct. Eng., 129(6), 784–791.
Trahair, N. S. (2003b). “Nonlinear elastic nonuniform torsion.” Research Rep. No. R828, Dept. of Civil Engineering, Univ. of Sydney.
Trahair, N. S. (2004). “Biaxial bending of steel angle section beams.” J. Struct. Eng., 130(4), 554–561.
Trahair, N. S. (2005). “Buckling and torsion of steel unequal angle beams.” J. Struct. Eng., 131(3), 474-480.
Trahair, N. S., Bradford, M. A., and Nethercot, D. A. (2001). The behavior and design of steel structures to BS5950, 3rd British Ed., E&FN Spon, London.
Trahair, N. S., and Teh, L. H. (2001). “Second-order moments in torsion members.” Eng. Struct., 23(6), 631–642.
Information & Authors
Information
Published In
Copyright
© 2005 ASCE.
History
Received: Oct 2, 2003
Accepted: Jul 29, 2004
Published online: Mar 1, 2005
Published in print: Mar 2005
Notes
Note. Associate Editor: Donald W. White
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.