Strain Distribution in OSB and GWB in Wood-Frame Shear Walls
Publication: Journal of Structural Engineering
Volume 135, Issue 6
Abstract
The overall goal of this study is to gain an insight into the load sharing aspect between oriented strand board (OSB) and gypsum wall board (GWB) in shear wall assembly during racking load. Sixteen standard walls were tested monotonically, in total, out of which 11 (Type A) were sheathed on both sides (OSB on one side and GWB on the other), while five walls were tested without GWB (Type B). Digital image correlation (DIC) was used for data acquisition and analysis which is a full-field, noncontact technique for measurement of displacements and strains. The system returns full-field three-dimensional displacement and strain data measured over the visible specimen surfaces. Overall, these tests suggest that initially during loading of a wall the load is shared between OSB and GWB. However, the proportion of load sharing is not known. As GWB fails first at about 60% of ultimate load capacity of the wall, the load shifts to the OSB panel which resists it until the failure of the wall. The tests also revealed that the load path in wall Types A and B is different and so is the failure pattern. Strains were locally concentrated around the fasteners, while the strains in the field of the panel were below the detection limit of DIC system.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 135 • Issue 6 • June 2009
Pages: 666 - 675
Copyright
© 2009 ASCE.
History
Received: Jul 25, 2007
Accepted: Dec 9, 2008
Published online: May 15, 2009
Published in print: Jun 2009
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