Midply Wood Shear Wall System: Performance in Dynamic Testing
Publication: Journal of Structural Engineering
Volume 133, Issue 7
Abstract
The midply shear wall system is a new concept in shear wall design. Test results presented here demonstrate that midply walls have superior survival characteristics under earthquake loading, and have a dynamic load-carrying capacity of more than two and a half times that of comparable standard shear walls. To prevent brittle failure at the end studs due to high-tension forces, steel rods are used at each end of the midply wall in lieu of hold-down connectors. Seismic damage accumulation was identified experimentally for the first time in wood shear walls under repeated earthquake loading. Further understanding of this phenomenon is important for seismic safety evaluation of buildings which experience multiple earthquakes during their service life. This study and the previous work on the static and cyclic performance of midply walls provide design engineers with experimental and conceptual evidence of the suitability of midply walls in wood construction applications where the architecture requires superior shear resistance.
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Acknowledgments
The financial support for the research program by Forintek Canada Corp. industry members, the Science Council of B.C., Natural Resources Canada (Canadian Forest Service), and the provinces of British Columbia, Alberta, Saskatchewan, Quebec, Nova Scotia, New Brunswick, Ontario, Manitoba, and Newfoundland, and Labrador are gratefully acknowledged. The shake table tests were carried out at the Earthquake Facility at the University of British Columbia. The writers thank the staff of Forintek Canada Corp., Western Laboratory in Vancouver, B.C., and the technical staff of the Mechanical Engineering Work Shop at the University of British Columbia for their valuable contributions to this work. Finally, the technical contributions by H. Fraser, P. Symons, W. Deacon, and J. Gardy are acknowledged with thanks.
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© 2007 ASCE.
History
Received: Feb 6, 2006
Accepted: Oct 9, 2006
Published online: Jul 1, 2007
Published in print: Jul 2007
Notes
Note. Associate Editor: J. Daniel Dolan
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