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Title: Precast roof tests in support of the Keyworker Blast Shelter Program
Authors: Keyworker Blast Shelter Program.
United States. Federal Emergency Management Agency.
Garner, Sharon B.
Keywords: Blast effects
Explosion effects
Nuclear bomb shelters
Precast concrete
Keyworker Blast Shelter Program
Buried structures
Underground structures
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-86-43.
Description: Technical Report
Abstract: Tests were conducted to investigate the capacity of precast simply supported roof panels to withstand a design overpressure of 50 psi from a 1-MT nuclear detonation. Another purpose of the study was to determine what part, if any, soil arching plays in increasing the load capacity of a shallow-buried, simply supported roof. Nine roof elements of three different thicknesses were tested in three separate events. Test 1 roof slabs (2-1/2 inches thick) showed no visible cracking and no permanent downward deflection. Test 2 slabs (2 inches thick) showed cracks at midspan on the top side of both end panels and on the underside of one end panel. Test 3 slabs (1-1/2 inches thick) experienced greater midspan deflections than the slabs in the previous tests. Analysis of the test results indicates that thin precast roof elements are viable alternatives to a cast-in-place roof. Roof capacity was enhanced by soil arching.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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