Experimental Investigation of the Effect of Vertical Load on the Capacity of Wood Shear Walls
Publication: Journal of Structural Engineering
Volume 131, Issue 7
Abstract
A series of 10 tests were conducted to determine the effect of a vertical load on the lateral load capacity of wood frame shear walls. Static tests were performed on 2.4 m-by wood walls, for varying vertical load. Tests were conducted with and without hold-down anchors. Specimens were subjected to three half cycles of lateral loading, the final being to failure. The presence of vertical load on a wood frame shear wall was found to have a significant effect on the lateral load capacity of the wall. The ultimate load capacities of walls with hold-down anchors increased by 20 and 28% for walls with a vertical load of 12 and , respectively, as compared to the wall without vertical load. The vertical load was also found to have significant effect on the lateral stiffness of the wall. Results also show that hold-down anchors do not add significantly to the strength of the wall when a vertical load equal to the maximum allowable is present. Finally, the results presented suggest that current code specified allowable shear forces are conservative when a vertical load is present; the wall has additional reserve capacity than is reflected by current code specified allowable shears.
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Acknowledgments
Support for this investigation was provided by the U.S. Department of Agriculture under Grant No. 2001-35103-09934 and the University of Delaware. The writers would like to thank the sponsors for their support.
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History
Received: Aug 28, 2003
Accepted: Dec 20, 2004
Published online: Jul 1, 2005
Published in print: Jul 2005
Notes
Note. Associate Editor: J. Daniel Dolan
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