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Title: Vulnerability evaluation of the Keyworker Blast Shelter
Authors: Keyworker Blast Shelter Program.
United States. Federal Emergency Management Agency.
Slawson, Thomas R.
Keywords: Blast effects
Explosion effects
Structural design
Structural analysis
Soil-structure interaction
Nuclear blast shelters
Shallow-buried structures
Underground structures
Keyworker Blast Shelter
Publisher: Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; SL-87-10.
Description: Technical Report
Abstract: The 100-man Keyworker blast shelter that survived MINOR SCALE (a high explosive event) was retested using the High Explosive Simulation Technique (HEST) in August 1986. The test was conducted at White Sands Missile Range, N. Mex. The existing structure sustained minor damage (1/8-inch permanent midspan deflection) during MINOR SCALE at the predicted 75-psi peak overpressure level, and a retest was proposed to investigate the shelter's large deformation behavior. The shelter was tested using a 1-MT nuclear weapon simulation at 130- to 160-psi (depending on the duration of the simulation). The shelter survived the test with large plastic roof deformations ranging from 8 to 17 inches at roof midspan. The failure mode of the shelter roof was very ductile, and the shelter had adequate reserve capacity to withstand large deformations without catastrophic failure. Survivability of occupants and mechanical equipment at this overpressure was investigated. The mechanical equipment inside the shelter was fully functional after the test except for the roof-mounted fluorescent light fixtures. In-structure shock was within acceptable limits for shelter occupants, and high-speed movies of the mannequin movement reinforced this conclusion. Based on this test result, it is concluded that the shelter performed as designed in the buried configuration under ideal backfill conditions. Additional scale model tests validated the shelter design in the bermed configuration and in various backfill types.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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