Accession Number : AD0848917

Title :   Dynamically Loaded Circular Composite Slabs Phase II: Project Hercules.

Descriptive Note : Technical rept. Jan-Apr 68,

Corporate Author : NEW MEXICO UNIV ALBUQUERQUE ERIC H WANG CIVIL ENGINEERING RESEARCH FACILITY

Personal Author(s) : Mills, Laddie ; Carellas, James G.

Report Date : FEB 1969

Pagination or Media Count : 128

Abstract : Seven circular composite slabs were tested simultaneously in a test facility designed to simulate the air pressure and airblast-induced ground motions of a nuclear blast. The slabs were designed to give information about the load-carrying capacity of a possible missile launch facility closure concept based on a thick concrete slab confined by a steel ring at the periphery and a steel plate on the bottom. Five of the slabs had a clear-span diameter of 36 inches and two had a clear-span diameter of 18 inches. The thickness-to-clear-span ratios varied from 3.6 to 1.8. Instrumentation was provided to measure (1) strains in the concrete, the bottom plates, and the confining rings; (2) accelerations and displacements at the centerlines of the slabs; and (3) velocities of the foundations of the slabs. Only one slab showed signs of impending failure with crack patterns indicating the development of a punching shear failure. Although some instrumentation records yield reasonable data, most of the records were inconsistent and difficult to interpret. (Author)

Descriptors :   (*GUIDED MISSILE SILOS, NUCLEAR EXPLOSIONS), (*REINFORCED CONCRETE, GUIDED MISSILE SILOS), DOORS, COMPOSITE MATERIALS, LOADS(FORCES), BLAST, SIMULATION, REINFORCING MATERIALS, METAL PLATES, STEEL, DATA PROCESSING.

Subject Categories : Guided Missile Launching and Basing Support

Distribution Statement : APPROVED FOR PUBLIC RELEASE