Experimental and Numerical Assessment of Woodframe Sheathing Layer Combinations for Use in Strength-Based and Performance-Based Design
Publication: Journal of Structural Engineering
Volume 142, Issue 4
Abstract
Woodframe buildings are unique in that the nonstructural finishes such as gypsum wall board and stucco provide significant stiffness and strength relative to the lateral force resisting system, e.g., wood shear walls. Wall finishes, or components within a woodframe wall subassembly, can consist of multiple layered modern and/or archaic elements such as wood planks, drywall, plaster on lathe, stucco, or plywood. There exist significant differences in ductility among these materials, raising questions about how best to superimpose single-degree-of-freedom hysteretic models or backbone curves during nonlinear time history analysis or when combining backbone curves for design and retrofit. This paper presents the method and results of an experimental study of 18 walls installed with one, two, or three of the previously described finishes. Testing was performed to determine the best approach to add the sheathing layers numerically when combining the backbone curves for analysis and design. Nonlinear dynamic analyses were conducted to quantify the difference between the behavior of the combined sheathing test and the superimposed single layer sheathings.
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Acknowledgments
This material is based upon work supported by the National Science Foundation under Grant No. CMMI-1041631 and CMMI-1314957 (NEES Research) and NEES Operations. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the investigators and do not necessarily reflect the views of the National Science Foundation. A sincere thank you to Simpson Strong-Tie for their financial, personnel, and product support throughout the project. Thank you to Co-PI’s Weichiang Pang and Xiaoyun Shao for their contributions to the overall project. The authors kindly acknowledge the other senior personnel of the NEES-Soft project:, David V. Rosowsky at University of Vermont, Andre Filiatrault at University at Buffalo, Shiling Pei at South Dakota State University, David Mar at Tipping Mar, and Charles Chadwell at Cal-Poly; and the practitioner advisory committee: Laurence Kornfield, Steve Pryor, Tom Van Dorpe, Doug Thompson, Kelly Cobeen, Janiele Maffei, Douglas Taylor, and Rose Grant. A special thanks to graduate students Giraj Kandukuri and Trung Do, and undergraduate students, Richard Stone and Vaishak Gopi, for their help on constructing the specimens.
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Published In
Journal of Structural Engineering
Volume 142 • Issue 4 • April 2016
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Feb 14, 2014
Accepted: Jun 10, 2014
Published online: Jul 15, 2014
Discussion open until: Dec 15, 2014
Published in print: Apr 1, 2016
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