Strength Reduction Factors for High-Aspect-Ratio OSB Cold-Formed Steel Frame Shear Walls
Publication: Journal of Structural Engineering
Volume 141, Issue 5
Abstract
Design provisions for cold-formed steel (CFS) light frame shear walls with wall height-to-width/length ratios (aspect ratios) greater than , and less than , requires a reduction in nominal strength based on the wall aspect ratio. This reduction is attributed to increased wall flexibility. The current strength reduction is not supported by existing data and it is not justified given building code lateral displacement limits and the availability of expressions to estimate wall displacement. Additionally, a significant underestimation of nominal or peak strength is not helpful where capacity-based design is adopted. In this paper, the results of an experimental program that included 11-mm oriented strand board (OSB) sheathed CFS shear walls with aspect ratios between and are presented, and a conservative, more consistent and less severe strength reduction expression is offered—an expression that facilitates more sustainable design and meets the intention of the current standards of engineering practice.
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Acknowledgments
The authors would like to acknowledge the financial support provided for this project by the Clare Boothe Luce Scholar Program at Santa Clara University. Material donations from California Expanded Metal Company (CEMCO), along with engineering and staff support from CEMCO Engineering Laboratory, are also gratefully appreciated.
References
American Iron and Steel Institute (AISI). (2009). “North American standard for cold-formed steel lateral design.” AISI S213, Washington, DC.
American Iron and Steel Institute (AISI). (2010). “Cold-formed steel framing seismic design optimization phase 1a: Seismic equivalency parameter evaluation.” AISI RP10-4, Washington, DC.
ASTM. (2012a). “Standard test methods and definitions for mechanical testing of steel products.” ASTM A370, West Conshohocken, PA.
ASTM. (2012b). “Standard test methods for cyclic (reversed) load test for shear resistance of vertical elements of the lateral force resisting systems for buildings.” ASTM E2126, West Conshohocken, PA.
Boudreault, F. A., Blais, C., and Rogers, C. A. (2007). “Seismic force modification factors for light-guage steel-frame–wood structural panel shear walls.” Can. J. Civ. Eng., 34(1), 56–65.
Branston, A. E., Boudreault, F. A., Chen, C. Y., and Rogers, C. A. (2006). “Light gauge steel frame—Wood structural panel shear wall design method.” Can. J. Civ. Eng., 33(7), 872–889.
Certified Steel Stud Association (CSSA). (2013). “Certified steel stud association cold-formed steel framing: ESR-3016.” International Code Council Evaluation Services, Whittier, CA.
Dao, T. N., and van de Lindt, J. W. (2013). “Seismic performance of an innovative light-frame cold-formed steel frame for midrise construction.” J. Struct. Eng., 837–848.
Department of Commerce (DOC). (2011). “Performance standard for wood-based structural-use panels: Voluntary product standard PS 2-10.” U.S. Dept. of Commerce, Washington, DC.
Fülöp, L. A., and Dubina, D. (2006). “Design criteria for seam and sheeting-to-framing connections of cold-formed steel shear panels American Society of Civil Engineers.” J. Struct. Eng., 582–590.
International Conference of Building Officials (ICBO). (1997). Uniform building code, Whittier, CA.
Li, Y., Shen, Z., Yao, X., Ma, R., and Liu, F. (2013). “Experimental investigation and design method research on low-rise cold-formed thin-walled steel framing buildings.” J. Struct. Eng., 818–836.
Liu, P., Peterman, K. D., Yu, C., and Schafer, B. W. (2012). “Characterization of cold-formed steel shear wall behavior under cyclic loading for the-CFS-NEES building.” 21st Int. Specialty Conf. on Cold-Formed Steel Structures, Center for Cold-Formed Steel Structures, Missouri Univ. of Science and Technology, Rolla, MI, 703–722.
Ozaki, F., Kawai, Y., Kanno, R., and Hanya, K. (2013). “Damage-control systems using replaceable energy-dissipating steel fuses for cold-formed steel structures: Seismic behavior by shake table tests.” J. Struct. Eng., 787–795.
Rogers, C. A., Balh, N., Ong-Tone, C., Shamim, I., and DaBreo, J. (2011). “Development of seismic design provisions for steel sheet sheathed shear walls.” Structures Congress 2011, ASCE, Reston, VA, 676–687.
Yanagi, N., and Yu, C. (2014). “Effective strip method for the design of cold-formed steel framed shear wall with steel sheet sheathing.” J. Struct. Eng., 04013101(8).
Yu, C. (2010). “Distortional buckling of cold-formed steel shear wall studs under uplift force.” J. Struct. Eng., 317–323.
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Information
Published In
Journal of Structural Engineering
Volume 141 • Issue 5 • May 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Apr 9, 2014
Accepted: Apr 9, 2014
Published online: Jul 23, 2014
Discussion open until: Dec 23, 2014
Published in print: May 1, 2015
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