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Shock and Vibration
Volume 2014, Article ID 789202, 11 pages
http://dx.doi.org/10.1155/2014/789202
Research Article

Experimental and Numerical Investigation of the Ground Shock Coupling Factor for Near-Surface Detonations

1U.S. Army Engineer Research and Development Center, Impact and Explosion Effects Branch, Geotechnical and Structures Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180-6199, USA
2Louisiana State University, 3418H Patrick F. Taylor Hall, Baton Rouge, LA 70803, USA

Received 29 January 2013; Accepted 6 February 2014; Published 26 March 2014

Academic Editor: Vadim V. Silberschmidt

Copyright © 2014 Timothy W. Shelton et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents the results of recent ground shock experiments conducted by the U.S. Army Engineer Research and Development Center to further investigate the adequacy of the coupling factor approach to shallow-buried or near-surface detonations. Comparisons between these recent experimental results and results of numerical simulations of the ground shock propagation in soil are presented. It was found that the coupling factor curve currently adopted in design of buried structures does not accurately represent the actual ground shock propagation in soil and that different coupling factor curves are needed for different physical quantities of interest in design. The results presented in this paper also suggest that the coupling factor curves are functions of several parameters in addition to the depth of burial and that numerical simulations can capture reasonably well the ground shock propagation of soil stresses and particle velocities.