Assessment of Insulated Concrete Walls to Close-In Blast Demands
Publication: Journal of Performance of Constructed Facilities
Volume 29, Issue 6
Abstract
Intentional and accidental impulsive loads from high-explosive detonations and munitions can result in significant damage to both civil and military facilities. One demand scenario of particular concern occurs during close-in detonation of high explosives. Even for resilient construction methods, such as reinforced concrete walls, these demands can produce undesirable effects including localized spall and breach. A popular form of exterior cladding in the United States consists of precast concrete insulated wall panels. These systems include an exterior concrete wythe, foam insulation layer, and an interior concrete wythe. While insulated wall panels are used to provide an energy-efficient building envelope, the insulation layer can provide a means of mitigating spall and breach of the panel. Thus, the performance of insulated wall panels subject to close-in blast demands is investigated. Both numerical simulations and experimental tests are carried out in order to assess the structural response of this wall system to close-in explosions. The results indicate that the use of insulated concrete wall panels provides enhanced resistance to spall and breach. This improvement is due to the sacrificial performance of the exterior wythe of the concrete panel and the increased standoff distance between the protected face and the threat provided by the insulation layer.
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Acknowledgments
This material is based on work supported by the National Science Foundation under Grant No. 1030812. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. The authors are grateful to Steve Brock and Gate Precast Company of Alabama for the donation of the panels, their fabrication, and shipment to the test range. The authors would like to acknowledge the Air Force Civil Engineer Center in Panama City, Florida, for the testing and data collection on the insulated panels presented in this paper. Last, the authors would like to thank the Precast/Prestressed Concrete Institute advisory board members Roger Becker, Ned Cleland, Ken Baur, Steve Brock, Harry Gleich, Jason Krohn, H. S. Lew, and Tommy Mitchell for their oversight on the research program.
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Information & Authors
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Published In
Journal of Performance of Constructed Facilities
Volume 29 • Issue 6 • December 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jan 27, 2014
Accepted: Jun 17, 2014
Published online: Sep 17, 2014
Discussion open until: Feb 17, 2015
Published in print: Dec 1, 2015
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