Design Interaction Equation for Steel Beam‐Columns
Publication: Journal of Structural Engineering
Volume 115, Issue 5
Abstract
For designing steel beam‐columns, the present AISC‐LRFD, AISC‐ASD linear interaction equations are simple to use, but they have some weaknesses. The AISC‐ASD interaction equations have a jump from a long to a short member, i.e., for a very short member, the stability interaction equation does not always reduce to the strength equation. For short beam‐columns in which the weakaxis bending and axial force are dominant, and for double curvature bending, the AISC‐LRFD bilinear interaction equation may result in an overly conservative design. In this paper, a unified design interaction equation for braced steel beam‐columns subjected to compression combined with biaxial bending is proposed. An extensive evaluation of the proposed design equation, as well as the AISC equations, is made and compared with exact inelastic solutions of I‐section beam‐columns and with the results of 81 full‐scale tests of biaxially loaded beam‐columns of I‐section. It is found that the load‐carrying capacity of steel beam‐columns can be estimated simply and more accurately by the proposed unified design interaction equation.
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References
1.
Anslijn, R. (1983). “Tests on steel I‐beam‐columns subjected to thrust and biaxial bending.” CRIF Report MT 157, Center De Recherches Scientifiques Et Techiques De L'industrie De, Fabrications Metalliques Brussels, Belgium.
2.
Bjorhovde, R., Galambos, T. V., and Ravindra, M. K. (1978). “LRFD criteria for steel beam‐columns,” J. Struct. Div., ASCE, 108(9), 1371–1387.
3.
Chen, W. F., and Zhou, S. P. (1987). “‐factor in load and resistance factor design.” J. Struct. Engrg., ASCE, 113(8), 1738–1754.
4.
Duan, L., Sohal, I. S., and Chen, W. F. (1988). “On beam‐column moment amplification factor.” Structural Engineering Report No. CE‐STR‐88‐11, School of Civil Engineering, Purdue University, West Lafayette, Ind.
5.
Galambos, T. V., and Ketter, R. L. (1961). “Columns under combined bending and thrust,” Trans., ASCE, 126, Part I, 1–25.
6.
Johnson, B. G., ed. (1976). SSRC guide to stability design criteria for metal structures, 3rd Ed., John Wiley & Sons, New York, N.Y.
7.
Kanchanalai, T. (1977). “The design and behavior of beam‐columns in unbraced steel frames.” AISI Project No. 189, Report No. 2, Civil Engineering/Structures Research Lab, University of Texas at Austin, Austin, Tex.
8.
Load and resistance factor design specification for structural steel buildings. (1986). American Institute of Steel Construction, Chicago, Ill.
9.
Pillai, S. U. (1981). “An assessment of CSA standard equations for beam‐column design.” Can. J. Civ. Eng., 8(2), 130–136.
10.
“Plastic design in steel—A guide and commentary.” (1971). ASCE manual of engineering practice, No. 41, 2nd Ed., ASCE, New York, N.Y.
11.
Specification for the design, fabrication and erection of structural steel buildings. (1978). American Institute of Steel Construction, Chicago, Ill.
12.
Tebedge, N., and Chen, W. F. (1974). “Design criteria for H‐columns under biaxial loading.” J. Struct. Div., ASCE, 100(3), 579–598.
13.
Trahair, N. S. (1986). “Design strength of steel beam‐columns.” Can. J. Civ. Engrg., 13(6), 639–646.
14.
VanKuren, R. C., and Galambos, T. V. (1964). “Beam‐column experiments.” J. Struct. Div., ASCE, 90(2), 223–255.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 115 • Issue 5 • May 1989
Pages: 1225 - 1243
Copyright
Copyright © 1989 ASCE.
History
Published online: May 1, 1989
Published in print: May 1989
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