Distortional Buckling of Cold-Formed Steel Shear Wall Studs under Uplift Force
Publication: Journal of Structural Engineering
Volume 136, Issue 3
Abstract
A cold-formed steel framed shear wall may fail in shear buckling of the sheathing, local buckling or distortional buckling of the framing member under compression forces or connection failures. An unusual distortional buckling mode on boundary studs under uplift forces was recently observed in a shear wall test program conducted at the University of North Texas. It was found in monotonic pushover shear wall tests that the flanges of the boundary studs undertaking uplift forces were distorted at the bottom area of the studs near the hold-down. This paper presents the test program and analysis of the unique distortional buckling mode. The paper also provides procedures for predicting the distortional buckling strength of the boundary studs, as well as the construction details to mitigate the damage by this unexpected distortional buckling mode.
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Acknowledgments
The funding by American Iron and Steel Institute and the donation of materials by Steel Stud Manufacturers Association, Simpson Strong-Tie Company, Inc., and NuconSteel Corp. are gratefully acknowledged. The test specimens were prepared by the UNT students Hitesh Vora, Pradeep Kumar, and Jimmy Tucker, their contribution to this research is highly recognized.
References
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 136 • Issue 3 • March 2010
Pages: 317 - 323
Copyright
© 2010 ASCE.
History
Received: Dec 11, 2008
Accepted: Oct 6, 2009
Published online: Feb 12, 2010
Published in print: Mar 2010
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