Tests of Fixed-Ended Plain Channel Columns
Publication: Journal of Structural Engineering
Volume 124, Issue 2
Abstract
The paper describes a test program on cold-formed plain channel columns compressed between fixed ends and pinned ends. Whereas it is well-known that local buckling of pin-ended channel columns induces overall bending, this phenomenon does not occur in fixed-ended channel columns that remain straight after local buckling and only bend when overall buckling occurs. These fundamentally different effects of local buckling on the behavior of pin-ended and fixed-ended channel sections lead to inconsistencies in traditional design approaches, which account for full or partial rotational end restraint solely by using effective lengths. A series of tests was performed for different geometries of cross section fabricated by brake pressing from high-strength steel sheet. Tests were performed over a range of lengths such that the column curve could be obtained. Local buckling loads were also obtained from the fixed-ended column tests. Detailed measurements of local and overall geometric imperfections, material properties, and residual stresses were conducted. The purpose of this paper is first to present and compare the test strengths with existing Australian/New Zealand, American, and European specifications for cold-formed steel structures and, second, to propose recommendations for the design of fixed-ended singly symmetric columns.
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References
1.
Batista, E., Rondal, J., and Maquoi, R. (1987). “Column stability of cold-formed U and C sections.”Proc. Int. Conf. on Steel and Aluminum Struct., R. Narayanan, ed., Cardiff, U.K., Elsevier Applied Science, London, 419–427.
2.
CEN/TC250/SC 3-PT 1A, Design of steel structures, part 1.3: cold-formed thin gauge members and sheeting. (1992). Eurocode 3, CEN, Brussels, Belgium.
3.
Cold-formed steel structures. (1996). Australian/New Zealand Standard AS/NZS 4600:1996, Standards Australia, Sydney, Australia.
4.
ENV 1993-1-3, Design of steel structures, part 1.3: supplementary rules for cold-formed thin gauge members and sheeting. (1996). Eurocode 3, CEN, Brussels, Belgium.
5.
Galambos, T. V. (ed.) (1988). Guide to stability design criteria for metal structures, 4th ed., John Wiley and Sons, Inc., New York, 708–710.
6.
Hancock, G. J.(1978). “Local, distortional and lateral buckling of I-beams.”J. Struct. Div., ASCE, 104(11), 1787–1798.
7.
Klöppel, K., and Bilstein, W. (1976). “Untersuchungen zur linearen und nichtlinearen Beultheorie mit Beulwerttafeln fur dunnwandige U, C- und Hut-Profile und Tafeln fur mitwirkende Breiten und Tragspannungen von dreiseitig und vierseitig gelenkig gelagerten Reckteckplatten nach der nichtlinearen Beultheorie.”Stahlbau, 45(2), 33–38 (in German).
8.
Methods for tensile testing of metals. (1991). Australian Standard AS 1391, Standards Assn. of Australia, Sydney, Australia.
9.
Rasmussen, K. J. R.(1994). “Design of thin-walled columns with unstiffened flanges.”Engrg. Struct., 16(5), 307–316.
10.
Rasmussen, K. J. R.(1997). “Bifurcation analysis of locally buckled members.”Thin-Walled Struct., 28(2), 117–154.
11.
Rasmussen, K. J. R., and Hancock, G. J.(1993). “The flexural behaviour of fixed-ended channel section columns.”Thin-Walled Struct., 17(1), 45–63.
12.
Rasmussen, K. J. R., and Hancock, G. J. (1994). “Design of thin-walled plain channel section columns against flexural buckling.”Thin-Walled Struct., 20(1–4), 219–240.
13.
Rhodes, J., and Harvey, J. M. (1977). “Interaction behaviour of plain channel columns under concentric or eccentric loading.”Proc., 2nd Int. Colloquium on Stability of Steel Struct., Liege, Belgium, 439–444.
14.
Specification for the design of cold-formed steel structural members. (1996). American Iron and Steel Institute, AISI, Washington, D.C.
15.
Venkataramaiah, K. R., and Roorda, J. (1982). “Analysis of local plate buckling experimental data.”Proc., 6th Int. Spec. Conf. on Cold-Formed Steel Struct., St. Louis, Mo., 45–74.
16.
Young, B., and Rasmussen, K. J. R. (1995a). “Compression tests of fixed-ended and pin-ended cold-formed plain channels.”Res. Rep. R714, School of Civ. and Min. Engrg., Univ. of Sydney, Sydney, Australia.
17.
Young, B., and Rasmussen, K. J. R. (1995b). “Compression tests of fixed-ended and pin-ended cold-formed lipped channels.”Res. Rep. R715, School of Civ. and Min. Engrg., Univ. of Sydney, Sydney, Australia.
18.
Young, B., and Rasmussen, K. J. R.(1997). “Bifurcation of singly symmetric columns.”Thin-Walled Struct., 28(2), 155–177.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 124 • Issue 2 • February 1998
Pages: 131 - 139
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Feb 1, 1998
Published in print: Feb 1998
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