Mitigating Ground Shocks with Cellular Solids
Publication: Journal of Engineering Mechanics
Volume 139, Issue 10
Abstract
Underground structures are sometimes threatened by ground shocks induced by subsurface detonations. This paper proposes one possible method to mitigate the subsurface blasts by attaching a cladding consisting of a face sheet and cellular solid core to the exterior of the structure; the cellular core is foam made from relatively strong materials, such as metal or concrete, rather than typical geofoam made from polymer. A simplified model is established to distinguish three scenarios to delineate the dynamic behavior of a foam cladding subjected to a ground shock. The model compares the velocity time histories of the face sheet and the surrounding soil, in which the foam crushing velocity is not high and the foam is densified uniformly. Further, the governing equations for possible high-velocity foam crushing are established, with progressive collapse as foam crushing mode when alleviating subsurface blasts.
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Acknowledgments
The third author acknowledges the support of the Collaborative Research Fund with Overseas, Hong Kong and Macau Scholars (Grant 51028801), of the National Natural Science Foundation of China.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 139 • Issue 10 • October 2013
Pages: 1362 - 1371
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Mar 30, 2012
Accepted: Dec 12, 2012
Published online: Dec 14, 2012
Published in print: Oct 1, 2013
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