Sheathed Cold-Formed Steel Studs under Axial and Lateral Load
Publication: Journal of Structural Engineering
Volume 140, Issue 10
Abstract
This research aims to identify and characterize the behavior of dissimilarly sheathed, load bearing, cold-formed steel studs under axial and lateral load. A series of tests on single studs, set in track, and sheathed with either oriented strand board, gypsum board, or combinations thereof are completed. The tests approximate the behavior of a sheathed stud within a larger wall. In each test, a predetermined level of axial load (or displacement) is introduced into the stud and lateral displacement (load) is then applied and increased until failure. This configuration results in axial load, bending, and (potentially) torsion on the stud. Observed failure modes for studs sheathed on only one face include torsion and/or fastener pull-through. For studs sheathed on both faces, failure modes include torsion, local buckling, fastener pull-through, and bearing (particularly for gypsum-sheathed studs). Analysis of the torsional response indicates the important role of the sheathing in limiting torsion and in determining the demands on the member and fastener. The observed member limit states compared favorably with the direct strength method of design even when direct torsion is not explicitly considered. New models for strength prediction in the connection limit states are explored. A model based on the torsional capacity of the fastener-sheathing system, limited by first failure in either pull-through or bearing, provides the best agreement with the observed connection limit states. Recommendations for design are provided.
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Acknowledgments
This paper was prepared as part of the American Iron and Steel Institute (AISI) sponsored project: Sheathing Braced Design of Wall Studs. The project also received supplementary support and funding from the Steel Stud Manufacturers Association (SSMA). Any opinions, findings, and conclusions or recommendations expressed in this publication are those of the authors and do not necessarily reflect the views of AISI, nor SSMA.
References
American Iron and Steel Institute (AISI). (2002). “Rotational-lateral stiffness test method for beam-to-panel assemblies.” AISI-TS-1, Cold-formed steel design manual, Washington, DC.
American Iron and Steel Institute (AISI). (2012). “North American specification for the design of cold-formed steel structural members.” AISI-S100, Washington, DC.
American Iron and Steel Institute (AISI). (2007). “North American standard for cold-formed steel framing—General provisions.” AISI-S200, Washington, DC.
Godinho, J., Gallant, S., Quiter, L., Aviram, A., Mayes, R. L., and Hamburger, R. O. (2013). “Design & detailing of metal stud wall systems in response to air-blast loading effects.” Paper presented at the Structures Congress 2013: Bridging Your Passion with Your Profession—Proc., 2013 Structures Congress, 226–238.
Green, G. G., Winter, G., and Cuykendall, T. R. (1947). “Light gage steel columns in wall-braced panels.” Cornell Univ. Eng. Exp. Station, 35, 1–50.
Lee, Y., and Miller, T. H. (2001). “Axial strength determination for gypsum-sheathed, cold-formed steel wall stud composite panels.” J. Struct. Eng., 608–615.
Li, Z., and Schafer, B. W. (2010). “Buckling analysis of cold-formed steel members with general boundary conditions using CUFSM: Conventional and constrained finite strip methods.” Proc., 20th Int. Spec. Conf. on Cold-Formed Steel Structures, Center for Cold-formed Steel Structures, Univ. of Missouri S&T, Rolla, MO, 17–32.
McGuire, W., Gallagher, R., and Ziemian, R. (1999). “Matrix Structural Analysis, with MASTAN2.” Wiley, New York.
Miller, T. H., and Pekoz, T. (1993). “Behavior of cold-formed steel wall stud assemblies.” J. Struct. Eng., 641–651.
Miller, T. H., and Pekoz, T. (1994). “Behavior of gypsum-sheathed cold-formed steel wall studs.” J. Struct. Eng., 1644–1650.
Peterman, K. D. (2012). “Experiments on the stability of sheathed cold-formed steel studs under axial load and bending.” M.S. thesis, Johns Hopkins Univ, Baltimore, MD.
Pham, M. M., Miles, J. E., and Zhuge, Y. (2006). “Experimental capacity assessment of cold-formed boxed stud and C stud wall systems used in Australian residential construction.” J. Struct. Eng., 631–635.
Salim, H., Muller, P., and Dinan, R. (2005). “Response of conventional steel stud wall systems under static and dynamic pressure.” J. Perform. Construct. Facil., 267–276.
Schafer, B. W., Vieira, L. C. M., Jr., Sangree, R. H., and Guan, Y. (2010). “Rotational restraint and distortional buckling in cold-formed steel framing systems.” Revista Sul-Americana de Engenharia Estrutural (South Am. J. Struct. Eng.), 7(1), 71–90.
Simaan, A., and Pekoz, T. (1976). “Diaphragm braced members and design of wall studs.” J. Struct. Div., 102(1), 77–92.
Vieira, L. C. M. (2011). “Behavior and design of sheathed cold-formed steel stud walls under compression.” Ph.D. dissertation, Johns Hopkins Univ., Baltimore, MD.
Telue, Y., and Mahendran, M. (2001). “Behaviour of cold-formed steel wall frames lined with plasterboard.” J. Construct.Steel Res., 57(4), 435–452.
Vieira, L. C. M., Jr., and Schafer, B. W. (2012). “Lateral stiffness and strength of sheathing braced cold-formed steel stud walls.” Eng. Struct., 37, 205–213.
Vieira, L. C. M., and Schafer, B. W. (2013). “Behavior and design of sheathed cold-formed steel stud walls under compression.” J. Struct. Eng., 772–786.
Vieira, L. C. M., Jr., Shifferaw, Y., and Schafer, B. W. (2011). “Experiments on sheathed cold-formed steel studs in compression.” J. Construct. Steel Res., 67(10), 1554–1566.
Winter, G. (1960). “Lateral bracing of beams and columns.” Trans., 125(3044), 807–826.
Ziemian, R. MASTAN2 [computer software]. 〈http://www.mastan2.com〉 (Dec. 02, 2013).
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© 2014 American Society of Civil Engineers.
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Received: Jan 13, 2013
Accepted: Oct 8, 2013
Published online: May 14, 2014
Published in print: Oct 1, 2014
Discussion open until: Oct 14, 2014
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