Browse > Article
http://dx.doi.org/10.12989/sem.2003.16.5.613

Lateral buckling of beams with top bracing  

Park, Jong-Sup (Department of Civil Engineering, 238 Harbert Engineering Center, Auburn University)
Kang, Young-Jong (Department of Civil and Environmental Engineering, Korea University)
Publication Information
Structural Engineering and Mechanics / v.16, no.5, 2003 , pp. 613-625 More about this Journal
Abstract
This paper presents the lateral-torsional buckling (LTB) of beams or girders with continuous lateral support at top flange. Traditional moment gradient factors ($C_b$) given by AISC in LRFD Specification for Structural Steel Buildings and by AASHTO in LRFD Bridge Design Specifications were reviewed. Finite-element method buckling analyses of doubly symmetric I-shaped beams with continuous top bracing were conducted to develop new moment gradient factors. A uniformly distributed load was applied at midheight and either or both end moments were applied at the ends of beams. The proposed solutions are simple and accurate for use by engineers to determine the LTB resistance of beams.
Keywords
lateral stability; stability analysis; buckling; beam; bracing;
Citations & Related Records

Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 2
연도 인용수 순위
1 American Association of State Highway and Transportation Officials (AASHTO) (1998), LRFD Bridge Design Specifications, Second Edition, Washington, D.C.
2 American Association of State Highway and Transportation Officials (AASHTO) (1994), LRFD Bridge Design Specifications, First Edition, Washington, D.C.
3 American Institute of Steel Construction (AISC) (1998), Load and Resistance Factor Design, Second Edition, Chicago, Illinois.
4 MSC/NASTRAN (1998), Quick Reference Guide, Version 70.5, the MacNeal-Schwindler Corporation, Los Angeles, CA.
5 Azizinamini, A., Kathol, S. and Beacham, M.W. (1994), "Steel girder bridge design: can it be simplified", Modern Steel Construction, 34(9), 44-47.
6 Guide to Stability Design Criteria for Metal Structures, 5th Ed. (1998), T.V. Galambos, ed., John Wiley & Sons, Inc. New York, N.Y.
7 Stallings, J.M., Cousins, T.E. and Tedesco, J.W. (1999), "Removal of diaphragms from three-span steel girder bridge", J. Bridge Engineering, ASCE, 4(1), 63-70.   DOI   ScienceOn
8 Trahair, N.S. (1979), "Elastic lateral buckling of continuously restrained beam-columns", The Profession of a Civil Engineer, Sydney University Press, Sydney, 61-73.
9 Nethercot, D.A. and Rockey, K.C. (1972), "A unified approach to the elastic lateral buckling of beams", AISC Engineering Journal, 9(3), 96-107.
10 Moore, M., Strand, K.A., Grubb, M.A. and Cayes, L.R. (1990), "Wheel-load distribution results from the AISIFHWA model bridge study", Transportation Research Report 1275, Transportation Research Board, National Research Council, Washington, D.C., 34-44.
11 Stallings, J.M., Cousins, T.E. and Stafford, T.E. (1996), "Effect of removing diaphragms from a steel girder bridge", Transportation Research Record 1541, Transportation Research Board, NRC, Washington, D.C., 183-188.
12 Walker, W.H. (1987), "Lateral load distribution in multigirder bridges", Engineering Journal, First Quarter, 21-28.
13 Trahair, N.S. (1993), Flexural-Torsional Buckling of Structures, CRC Press, Boca Raton, Fla.
14 American Association of State Highway and Transportation Officials (AASHTO) (1996), Standard Specifications for Highway Bridges, Sixteenth, Washington, D.C.
15 Keating, P.B. and Crozier, A.R. (1992), "Evaluation and repair of fatigue damage to Midland County bridges", Report TX-92/1313-1F, Texas Transportation Institute, Texas A&M University, College Station, Tex.
16 Kirby, P.A. and Nethercot, D.A. (1979), Design for Structural Stability, Wiley, New York. NY.