Rotational Stiffness of Wood Truss Joints in Lateral and Diagonal Bracing and Truss–Wall Connections
Publication: Journal of Architectural Engineering
Volume 25, Issue 1
Abstract
The modeling and structural analysis of roof systems composed of metal plate–connected wood trusses (MPCWTs) require a detailed understanding of the rotational stiffness associated with various connections of the MPCWTs to the bracing elements and to the walls supporting the roof. The purpose of this study was to measure the rotational stiffness of several truss–bracing and truss–wall connections attached to MPCWTs to be used for structural modeling. Bracing included discrete and continuous bracing supporting the top and bottom chords of trusses. Truss–wall connections used single fasteners and proprietary sheet-metal connections. For the bracing connections, the rotational stiffness of the discrete bracing was greater than the rotational stiffness of the continuous bracing. Joist hanger–style truss–wall connections had greater rotational stiffness compared with hurricane ties or single-fastener connections. The rotational stiffness of hurricane ties was much greater when the applied torque caused a tension force in the hurricane tie versus a compression force. The rotational stiffness of hurricane ties from two different manufacturers was not significantly different.
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Acknowledgments
This work was supported by an award (5R01OH009656) from the National Institute for Occupational Safety and Health (NIOSH) of the Centers for Disease Control and Prevention (CDC). Its contents are solely the responsibility of the authors and do not necessarily represent the official views of the CDC. This work was also supported by the National Institute of Food and Agriculture of the US Department of Agriculture (USDA), McIntire Stennis Project 0229938.
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Information
Published In
Journal of Architectural Engineering
Volume 25 • Issue 1 • March 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: May 5, 2017
Accepted: Oct 10, 2018
Published online: Jan 10, 2019
Published in print: Mar 1, 2019
Discussion open until: Jun 10, 2019
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