End Restraint Effect on Steel Column Strength
Publication: Journal of Structural Engineering
Volume 109, Issue 2
Abstract
Nonsway columns with initial crookedness and residual stresses, and partially restrained by linear, elastic‐plastic, or nonlinear end restraints are studied in the inelastic range. An algorithm based on an iterative tangent stiffness approach coupled with a finite‐difference equilibrium method is developed relative to the minor axis of the column cross section. The effect of end restraint on the response of imperfect columns is explained. The influence of imperfections on the behavior of partially restrained columns is identified by means of stiffness degradation curves. Finally, new design expressions are proposed for evaluating steel column strength which make use of a “plastic effective length factor” and the use of the proposed procedure illustrated by means of a design example.
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References
1.
Chen, W. F., “End Restraint and Column Stability,” Journal of the Structural Division, ASCE, Vol. 106, No. ST11, Proc. Paper 15796, Nov., 1980, pp. 2279–2295.
2.
Galambos, T. V., Structural Members and Frames, Prentice‐Hall, Inc., Englewood Cliffs, N.J., 1968, pp. 13–14.
3.
Johnston, B. G., ed., Guide to Stability Design Criteria for Metal Structures, 3rd ed., John Wiley and Sons, Inc., New York, N.Y., 1976.
4.
Jones, S. W., Kirby, P. A., and Nethercot, D. A., “Effect of Semi‐Rigid Connections on Steel Column Strength,” Journal of Constructional Steel Research, Vol. 1, No. 1, Sept., 1980, pp. 38–46.
5.
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Santathadaporn, S., and Chen, W. F., “Tangent Stiffness Method for Biaxial Bending,” Journal of the Structural Division, ASCE, Vol. 98, No. ST1, June, 1972, p. 153.
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Yura, J. A., “The Effective Length of Columns in Unbraced Frames,” Engineering Journal, American Institute of Steel Construction, Apr., 1971.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 109 • Issue 2 • February 1983
Pages: 314 - 334
Copyright
Copyright © 1983 ASCE.
History
Published online: Feb 1, 1983
Published in print: Feb 1983
Authors
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