Axial Compression Tests of Cold-Formed Angles
Publication: Journal of Structural Engineering
Volume 125, Issue 5
Abstract
This paper presents fixed-ended and pin-ended compression tests on cold-formed, in-line galvanized equal angles. Three nominal section sizes were tested ranging from nonslender to slender sections. Detailed measurements of material properties, residual stresses, and geometrical imperfections were conducted. The pin-ended specimens were tested with a minimal eccentricity of L/1,000 applied about the minor axis to cause compression at the tips of the legs. The test data are compared with the Australian and American specifications for cold-formed and hot-rolled steel structures. The section capacities obtained from the stub column tests are found to be between 15 and 40% higher than those calculated according to the specifications. It is concluded that there is no need to include the additional eccentricity specified in the Australian and American cold-formed steel structures standards accounting for the shift of the effective centroid, and that the eccentricity of L/1,000, specified for all section classes, should be applied to slender sections only. These conclusions lead to increases in the design strengths on the order of 25%.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
“Cold-formed steel structures.” (1996). AS 4600, Standards Australia/Standards New Zealand, Sydney, Australia.
2.
Denston R. J., and White, J. D. ( 1977). “An electrical demountable extensometer.” Tech. Rep. No. CUED/C-Struct/TR.61, Dept. of Engrg., University of Cambridge, Cambridge, U.K.
3.
Galambos, T. V. ( 1988). Guide to stability design criteria for metal structures, 4th Ed., Wiley, New York.
4.
Load and resistance factor design specification for structural steel buildings (LRFD) . (1993). American Institute of Steel Construction, Chicago.
5.
“Methods for tensile testing of metals.” (1991). AS 1391, Standards Australia, Sydney, Australia.
6.
Popovic, D., Hancock, G. J., and Rasmussen, K. J. R. ( 1996). “Axial compression tests of DuraGal angles.” Res. Rep. No. R730, Dept. of Civ. Engrg., Ctr. for Adv. Struct. Engrg., University of Sydney, Sydney, Australia.
7.
Specification for the design of cold-formed steel structural members . (1996). American Iron and Steel Institute, Washington, D.C.
8.
“Steel structures.” (1998). AS 4100, Standards Australia, Sydney, Australia.
9.
Zhao, X. L., and Hancock, G. J. ( 1993). “Test and design of butt welds and transverse fillet welds in thin cold-formed RHS members.” Res. Rep. No. R681, Dept. of Civ. Engrg., Ctr. for Adv. Struct. Engrg., University of Sydney, Sydney, Australia.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 125 • Issue 5 • May 1999
Pages: 515 - 523
History
Received: Feb 23, 1998
Published online: May 1, 1999
Published in print: May 1999
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.