Crippling Capacity of Web Elements with Openings
Publication: Journal of Structural Engineering
Volume 125, Issue 2
Abstract
Commonly used cold-formed steel sections utilized as either wall studs or floor joists contain web holes. The web holes may be factory punched or field cut. Because the Specification for the Design of Cold-Formed Steel Structural Members does not address the potential impact that a web hole can have on the structural integrity of the cold-formed steel member, research was necessary. Researchers at the University of Missouri-Rolla have explored the behavior of a flexural member that possesses a web hole. The scope of the UMR research includes flexure, shear, web crippling, and combinations thereof. The present paper will summarize the findings and design recommendations pertaining to web crippling resulting from either end-one-flange or interior-one-flange loading. The research determined that the paramount factors influencing the web crippling behavior were the relationship between the hole depth and the depth of the web and the relationship between the distance from the edge of the bearing and the flat depth of the web. Easily applied design relationships have been developed.
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References
1.
Deshmukh, S. U. ( 1996). “Behavior of cold-formed steel web elements with circular openings subjected to web crippling and a combination of bending and web crippling for interior-one-flange loading.” MS thesis, University of Missouri-Rolla, Rolla, Mo.
2.
Hetrakul, N., and Yu, W. W. ( 1978). “Structural behavior of beam webs subjected to web crippling and a combination of web crippling and bending.” Final Rep., Civ. Engrg. Study 78-4, University of Missouri-Rolla, Rolla, Mo.
3.
LaBoube, R. A., Yu, W. W., Langan, J. E., and Shan, M. Y. ( 1997). “Cold-formed steel webs with openings: Summary report.” Thin-walled structures, Vol. 27, No. 1., Elsevier Science, Great Britain.
4.
Langan, J. E., LaBoube, R. A., and Yu, W. W. ( 1994). “Structural behavior of perforated web elements of cold-formed steel flexural members subjected to web crippling and a combination of web crippling and bending.” Final Rep., Civ. Engrg. Study 94-3, Cold-Formed Steel Series, Department of Civil Engineering, University of Missouri-Rolla, Rolla, Mo.
5.
Load and resistance factor design specification for cold-formed steel structural members . (1991). American Iron and Steel Institute, Washington, D.C.
6.
Shan, M. Y., LaBoube, R. A., and Yu, W. W. ( 1994). “Behavior of web elements with openings subjected to bending, shear and the combination of bending and shear.” Final Rep., Civ. Engrg. Study 94-2, Cold-Formed Steel Series, Department of Civil Engineering, University of Missouri-Rolla, Rolla, Mo.
7.
Shanmugam, N. E. ( 1996). “Openings in thin-walled steel structures.” Proc., Bicentenary Conf. on Thin-Walled Struct., University of Strathclyde, Glasgow, Scotland.
8.
Sivakumaran, K. S., and Zielonka, K. M. ( 1989). “Web crippling strength of thin-walled steel members with web openings.” Thin-walled structures, Vol. 2, Elsevier Science, Great Britain.
9.
Specification for the design of cold-formed steel structural members, with 1989 Addendum . (1986). American Iron and Steel Institute, Washington, D.C.
10.
Steel and composite beams with web openings, Steel design guide series . (1990). American Institute of Steel Construction, Chicago, Ill.
11.
Uphoff, C. A. ( 1996). “Structural behavior of circular holes in web elements of cold-formed steel flexural members subjected to web crippling for end-one-flange loading.” MS thesis, University of Missouri-Rolla, Rolla, Mo.
12.
Winter, G., and Pian, R. H. J. ( 1946). “Crushing strength of thin steel webs.” Cornell Bull. No. 35, Department of Civil Engineering, Cornell University, Ithaca, N.Y.
13.
Yu, W. W. ( 1991). Cold-formed steel design, 2nd Ed., Wiley, New York.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 125 • Issue 2 • February 1999
Pages: 137 - 141
History
Received: Dec 23, 1997
Published online: Feb 1, 1999
Published in print: Feb 1999
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