Accession Number : ADA995263

Title :   OPERATION HARDTACK. Project 1.9. Loading on Buried Simulated Structures in High-Overpressure Regions.

Descriptive Note : Rept. for Apr-Oct 58,

Corporate Author : KAMAN TEMPO SANTA BARBARA CA

Personal Author(s) : Bultmann,E. H. ; McDonough,G. F. ; Sinnamon,G. K.

Report Date : 31 OCT 1984

Pagination or Media Count : 60

Abstract : The objective of this project was to study some of the factors affecting the transmission of air-blast-induced pressure through soil and the loading produced on buried structures by such pressures in the high-pressure region (approximately 250 psi). Factors studied were: (1) the attenuation of pressure in a sand deposit when the water table is a few feet below the ground surface; (2) the effect of duration of positive phase of blast on the pressure transmitted through such a soil; (3) the effect of structure flexibility on the pressure acting on structures buried in such a soil; and (4) the relationship between horizontal and vertical pressures in such a soil. The project employed 43 devices, each a rigid cylinder having one rigid end and one deformable-diaphragm end. The devices were buried at depths ranging from 0 to 20 feet at each of two locations at the Eniwetok Proving Ground. The locations were chosen to give a predicted ground surface overpressure of about 250 psi from each of two shots, Cactus and Koa. keywords: NTPR(Nuclear Test personnel Review).

Descriptors :   *BLAST LOADS, *NUCLEAR EXPLOSION TESTING, *UNDERGROUND STRUCTURES, ENEWETOK ATOLL, PRESSURE MEASUREMENT

Distribution Statement : APPROVED FOR PUBLIC RELEASE