Accession Number : AD0617172

Title :   FLEXIBLE MEASURING DEVICES AND INSPECTION OF OPERATION JANGLE STRUCTURES,

Corporate Author : BUREAU OF YARDS AND DOCKS WASHINGTON D C

Personal Author(s) : Dohrenwend,C. O. ; Mills,L. D. ; Kinney,J. S. ; Shalowitz,E. E.

Report Date : 28 JUL 1958

Pagination or Media Count : 121

Abstract : This project was planned and executed: (1) to determine the influence of certain parameters, especially structural flexibility, on the normal (perpendicular) loads generated against a structure by earth-propagated pulses resulting from underground explosions and (2) to inspect the damage to certain existing Operation Jangle structures and utilities within 1,000 feet of ground zero. To accomplish the objective, 15 flexible measuring devices were placed in the earth. All fifteen flexible measuring devices carried pressure gages at the center of the front face of the forward mass, and SR-4 strain gages were cemented to the outer surfaces of the torque tubes on eight of the devices. Six of these eight were fitted with accelerometers in the rear face of the forward mass. Three of the 15 flexible measuring devices were standard comparison devices, the flexibility and dimensions of which were arbitrarily selected. The twelve remaining devices were divided into four groups of three. Within each group of three devices one of the four parameters assumed to be of greatest importance in influencing dynamic structural flexibility was varied so as to study the influence of this particular parameter.

Descriptors :   (*UNDERGROUND STRUCTURES, NUCLEAR EXPLOSION DAMAGE), (*NUCLEAR EXPLOSION DAMAGE, UNDERGROUND STRUCTURES), STRUCTURES, EXPLOSION EFFECTS, LOADS(FORCES), ENGINEERING GEOLOGY, CIVIL ENGINEERING, INSTRUMENTATION, NUCLEAR EXPLOSIONS, UNDERGROUND EXPLOSIONS, PRESSURE GAGES

Distribution Statement : APPROVED FOR PUBLIC RELEASE