At the initiation of this study, civil defense planning called for the evacuation of nonessential personnel to safe host areas during a time of crisis, and the construction of shelters to protect the key workers remaining behind. The investigation documented in this report assist the US Army Engineer Division, Huntsville, in designing a 100-man key worker blast shelter. Six static tests and twelve dynamic tests were conducted on approximately 1/4- scale models of blast shelters. Specific objectives of these tests were to evaluate the preliminary structural design, to investigate structural response in various backfills, to investigate and recommend minimum concrete strength requirements, to evaluate structural response calculations, and to develop a data base on repeated hits so that structural response computational procedures can be developed to include the effects of repeated hits. Test results indicate that the key worker blast shelter design will resist a peak overpressure of 150 psi from a 1-MT nuclear weapon.
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/