Beam Web Strength under Pairs of Concentrated Compression Loads
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VIEW THE REPLYPublication: Practice Periodical on Structural Design and Construction
Volume 8, Issue 1
Abstract
Section K1 of the AISC allowable stress design and load and resistance factor design specifications prescribes a set of requirements by which the strength of the web of a flexural member or column must be evaluated when the web is subjected to a concentrated load. All of the work upon which these requirements are based consider only single point loads. Loading conditions may exist in which a beam is loaded by a pair of compression loads that are spaced in relatively close proximity. Application of the Section K1 provisions without consideration of the spacing of these loads may yield unconservative results. This paper derives means of evaluating when two compressive loads of such a pair may be considered to act independently and how they may be treated if they are close enough to interact with each other with respect to the strength of the web.
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References
AISC. (1989). Specification for structural steel buildings—allowable stress design and plastic design, 9th Ed., Chicago.
AISC. (2000). Load and resistance factor design specification for structural steel buildings, 3rd Ed., Chicago.
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Elgaaly, M., and Salker, R. K. (1991). “Web crippling under edge loading.” Proc., AISC National Steel Construction Conference, AISC, Chicago.
Graham, J. D., Sherbourne, A. N., Khabbaz, R. N., and Jensen, C. D. (1959). Welded interior beam-to-column connections, AISC, Chicago.
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Copyright © 2003 American Society of Civil Engineers.
History
Received: Nov 8, 2001
Accepted: Jan 24, 2002
Published online: Jan 15, 2003
Published in print: Feb 2003
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