Behavior of Structural Insulated Panels Subjected to Short-Term Axial Loads
Publication: Journal of Structural Engineering
Volume 145, Issue 11
Abstract
Structural insulated panels, commonly known as SIPs, constitute a panelized building system composed of external facer panels, such as oriented strandboard (OSB) sheets, bonded to a lightweight foam core. As the demand for SIPs increases as an alternative to light-frame construction in residential and light-commercial buildings, so too does the need for proper design requirements to satisfy regulatory agencies and building officials. This paper describes a combined experimental and analytical study whose objective was to investigate the structural behavior of OSB-faced SIPs subject to short-term axial loading. A total of 53 panels with varying types of foam core, thickness, and other construction details were subjected to concentric and eccentric loading. The test results indicated that the strength of SIPs was primarily influenced by the panel slenderness and the type of foam core. Reliability-based design expressions were developed for the ultimate limit state of SIPs subjected to short-duration concentric and eccentric axial loading. The results were also compared to current allowable stress design practices. In addition to presenting important test data for researchers, this paper presents a number of practical design recommendations to improve the performance of SIPs.
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Acknowledgments
The research presented in this paper was part of a broader project to develop test methods, design methodologies, and performance guidelines for demonstrating OSB-SIP compliance with the National Building Code of Canada. Funding for the research was provided by the National Research Council Canada, Alberta Innovates, Enerlab 2000, BASF Canada, Hexion, Plasti-fab, Nova Chemicals, Norbord, Prestige Panels, Premier Panels, and Kott Lumber. Materials for the research described herein were provided by Enerlab 2000, BASF Canada, Plasti-fab, Norbord, Prestige Panels, and Kott Lumber. The authors gratefully acknowledge the support of their colleagues in carrying out the project test program, including Husham Almansour, Glendon Pye, Omran Maadani, Jim Margeson, Bruce Baldock, Jean-Eric Sink, Roger Smith, Alex Wang, Ray Chevrier, and Skylar Manitowabi.
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Published In
Journal of Structural Engineering
Volume 145 • Issue 11 • November 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jan 5, 2018
Accepted: Feb 27, 2019
Published online: Aug 21, 2019
Published in print: Nov 1, 2019
Discussion open until: Jan 21, 2020
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