Effect of Hold-Down Misplacement on Strength and Stiffness of Wood Shear Walls
Publication: Practice Periodical on Structural Design and Construction
Volume 10, Issue 2
Abstract
The objective of this study was to determine the effect of misplaced hold-downs on the monotonic and cyclic behavior of wood shear walls. Three shear wall configurations were considered: (1) walls with hold-downs at the ends; (2) walls with one misplaced hold-down to the first interior stud; and (3) walls with misplaced hold-downs plus additional nailing applied to the stud attached to misplaced hold-downs. Results showed that misplaced hold-downs cause reductions in strength and absorbed energy. Specimens with misplaced hold-downs achieved strength values 42% lower under monotonic loading and 35% lower under cyclic loading when compared to the specimens with hold-downs at the ends. Specimens with misplaced hold-downs plus additional nailing reached an average strength that was 21% lower under monotonic loading and 19% lower under cyclic loading when compared to the specimens with hold-downs at the ends. Denser nail spacing applied to the stud with misplaced hold-downs significantly increased the amount of energy absorbed by the shear walls. The monotonic and cyclic test results showed that misplaced hold-downs have detrimental effects on the structural performance of wood shear walls. Application of denser nail spacing can help such walls regain strength.
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Acknowledgments
The writers acknowledge the assistance provided by Milo Clauson, Faculty Research Assistance, Department of Wood Science and Engineering, Oregon State University, and the support provided by the Forest Research Laboratory, College of Forestry, Oregon State University, through a Center for Wood Utilization Research grant.
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Information & Authors
Information
Published In
Practice Periodical on Structural Design and Construction
Volume 10 • Issue 2 • May 2005
Pages: 79 - 87
Copyright
© 2005 ASCE.
History
Received: Sep 17, 2003
Accepted: Jan 15, 2004
Published online: May 1, 2005
Published in print: May 2005
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