Accession Number : AD0617150

Title :   BEHAVIOR OF UNDERGROUND STRUCTURES SUBJECTED TO AN UNDERGROUND EXPLOSION,

Corporate Author : ILLINOIS UNIV URBANA

Personal Author(s) : Sinnamon,G. K. ; Woodring,R. E. ; Newmark,N. M. ; Matsuda,F.

Report Date : 11 OCT 1957

Pagination or Media Count : 54

Abstract : Two buried reinforced concrete four-walled structures without floor or roof were tested, one at 200 feet and the other at 250 feet from a 1.2 kt device buried at a depth of 67 feet. The structures were instrumented to give transient load and response data. In addition, provisions were made to obtain data on permanent displacements and strains. The crater formed by the explosion was unexpectedly small, being 146 feet in radius, so that the two targets were approximately 50 and 100 feet from the edge of the crater. The structures responded primarily as rigid bodies and followed the soil motion; consequently there was no structural damage. The permanent movements of the boxes were 3.8 feet and 0.5 foot, horizontally, away from the point of burst. It is concluded that buried structures of the type tested are difficult to damage structurally, unless located within or close to the edge of the crater and that, for structures outside of the crater, problems created by large earth movements and throwout might be critical for structures relatively close to the edge of the crater.

Descriptors :   (*UNDERGROUND STRUCTURES, UNDERGROUND EXPLOSIONS), (*UNDERGROUND EXPLOSIONS, UNDERGROUND STRUCTURES), (*NUCLEAR EXPLOSION DAMAGE, UNDERGROUND STRUCTURES), REINFORCED CONCRETE, TEST METHODS, SOIL MECHANICS, STRUCTURAL PROPERTIES, MATHEMATICAL ANALYSIS, STRUCTURES, SOILS, STRESSES, PRESSURE

Distribution Statement : APPROVED FOR PUBLIC RELEASE