Midply Truss Wall System: High-Performance Shear Wall for Midrise Wood-Frame Buildings
Publication: Journal of Structural Engineering
Volume 138, Issue 9
Abstract
A high-performance wood-frame shear wall system, named the MIDPLY truss wall (MTW), was developed for application to midrise wood-frame buildings. The basic MTW system consists of metal-plate–connected wood trusses, sheathing panels, and steel tie-downs. The sheathing panels of the MTW system are placed between the wood trusses and connected with mechanical fasteners. The main concept of the MTW system is to increase the lateral load resistance of a shear wall by reconfiguring the wall frame members into lateral load–resisting wood trusses. In this study, the feasibility of the MTW system was investigated. Eight mm MTW walls were constructed and tested under monotonic and cyclic loading in accordance with ASTM test standards. Shear stiffness, strength properties, and ductility of the MTW walls were evaluated and compared with those of comparable MIDPLY walls. Overall, the MTW system shows significant improvements in shear stiffness, yield load, peak load, and ductility. This paper contains a discussion of the failure modes, the effect of the vertical load, the importance of truss design, and the further studies needed.
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Acknowledgments
The author would like to acknowledge the contribution and effort of all members of the research team, especially, Mr. Paul Symons, Mr. Philip Eng, and Mr. Bill Deacon of FPInnovations-Wood Products Division, and the Natural Sciences and Engineering Research Council of Canada-Industrial R&D Fellowships Program (NSERC-IRDF) for the funding support. Truss plates and a portable presser, and technical assistance received from Eagle Metal Products are greatly appreciated.
References
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 138 • Issue 9 • September 2012
Pages: 1120 - 1127
Copyright
© 2012 American Society of Civil Engineers.
History
Received: May 11, 2011
Accepted: Nov 4, 2011
Published online: Nov 8, 2011
Published in print: Sep 1, 2012
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