Lateral‐Torsional Buckling of Thin‐Walled I‐Beams
Publication: Journal of Structural Engineering
Volume 114, Issue 4
Abstract
An experimental study is presented on the interaction of local and lateral‐torsional buckling of thin‐walled I‐shaped beams. Welded beams with four different cross‐sectional sizes are tested under a concentrated load at the center of the simply supported span. The flange width‐thickness ratios are 14.7 and 17.5, and those of the web vary from 62.3–96.0. The slenderness ratios about the minor axis are approximately 50, 70, and 100. For the beams with intermediate length, the combined failure mode of local flange and lateral‐torsional buckling is obtained, while the long beams fail only by lateral‐torsional buckling. Though local flange buckling with a short wavelength occurs only near the span center of the beams, the ultimate strengths are considerably lower than those of stocky beams. By comparing the experimental ultimate strength and the nominal design strength of the specifications in North America, it is found that the design approaches based on the effective width concept give reasonable estimates for the test results.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
American Institute of Steel Construction. (1986). Load and resistance factor design specification for structural steel buildings. AISC, Chicago, Ill.
2.
American Iron and Steel Institute. (1986). Specification for the design of coldformed steel structural members. AISI, Washington, D.C.
3.
Bleich, F. (1952). Buckling strength of metal structures. McGraw‐Hill Book Co., New York, N.Y.
4.
Bradford, M. A., and Hancock, G. J. (1984). “Elastic interaction of local and lateral buckling in beams.” Thin‐Walled Struct., 2(1), 1–25.
5.
Bulson, P. S., and Nethercot, D. A. (1986). “New British code for the design of aluminum structures.” IABSE Colloquium on Thin‐Walled Metal Structures in Buildings, Stockholm, Sweden, 43–50.
6.
Canadian Standards Association. (1984). Cold formed steel structural members. CAN3‐S136‐M84, Canadian Standards Association, Rexdale, Ontario, Canada.
7.
Cherry, S. (1960). “The stability of beams with buckled compression flanges.” Struct. Engr., 38(9), 277–285.
8.
Davies, J. M., and Thomasson, P. O. (1983). “Local and overall buckling of light gage members.” Instability and plastic collapse of steel structures, L. J. Morris, ed., Granada Publishing, London, England, 479–492.
9.
Dawe, J. L., and Kulak, G. L. (1984). “Local buckling of W‐shape columns and beams.” J. Struct. Engrg., ASCE, 110(6), 1292–1304.
10.
European Convention for Constructional Steelwork. (1981). European recommendations for steel construction. The Construction Press, London, England.
11.
Fukumoto, Y., and Kubo, M. (1977). “An experimental review of lateral buckling of beams and girders.” Proceedings of the International Colloquium on Stability of Steel Structures under Static and Dynamic Loads, SSRC‐ASCE, Washington, D.C., 541–562.
12.
Fukumoto, Y., and Itoh, Y. (1981). “Statistical study of experiments on welded beams.” J. Struct. Div., ASCE, 107(ST1), 89–103.
13.
Fukumoto, Y., Itoh, Y., and Kubo, M. (1980). “Strength variation of laterally unsupported beams.” J. Struct. Div., ASCE, 106(ST1), 165–181.
14.
Johnston, B. G. (1976). Guide to stability design criteria for metal structures. 3rd Ed., John Wiley and Sons, Inc., New York, N.Y.
15.
Kubo, M., and Fukumoto, Y. (1986). “Effects of moment distribution on lateraltorsional buckling strength of rolled steel I‐beams.” Proc. Japan Soc. of Civ. Engrg., 368(1–5), 255–263 (in Japanese).
16.
Narayanan, R. (1983). Beams and beam‐columns; stability and strength. Applied Science Publishers, London, England.
17.
Peköz, T. (1986). “Development of a unified approach to the design of coldformed steel members.” Proceedings of the Eight International Specialty Conference on Cold‐Formed Steel Structures, St. Louis, Mo., 77–84.
18.
Roberts, T. M., and Jhita, P. S. (1983). “Lateral, local and distortional buckling of I‐beams.” Thin‐Walled Struct., 1(4), 289–308.
19.
Sharp, M. L. (1970). “Strength of beams or columns with buckled elements.” J. Struct. Div., ASCE, 96(ST5), 1011–1015.
20.
Thomasson, P. O. (1986). “The new European recommendations for the design of light gauge steel members.” Proceedings of the Eight International Specialty Conference on Cold‐Formed Steel Structures, St. Louis, Mo., 43–58.
21.
Wang, S. T., Yost, M. I., and Tien, Y. L. (1977). “Lateral buckling of locally buckled beams using finite element techniques.” Int. J. Comput. Struct., 7, 469–475.
22.
Yoshida, H., and Maegawa, K. (1984). “Lateral instability of I‐beams with imperfections.” J. Struct. Engrg., ASCE, 110(8), 1875–1892.
Information & Authors
Information
Published In
Copyright
Copyright © 1988 ASCE.
History
Published online: Apr 1, 1988
Published in print: Apr 1988
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.