Precast Roofs for Blast Sheltersby S. B. Garner, USAE/WES, Vicksburg, MS, USA,
Abstract: A shallow-buried reinforced concrete blast shelter has been constructed and dynamically tested at the U. S. Army Engineer Waterways Experiment Station (WES). Three thicknesses of precast roof panels were designed for the shelter. One-quarter-scale models were constructed and dynamically tested using a 16-kt, 50-psi simulation. The structure was instrumented to determine pressures across the roof, roof deflection, and roof and floor accelerations. Deflections in all tests were small (less than L/40). Nonuniform loadings due to soil arching were observed in all three tests with the greatest reduction in loading occurring in the most flexible panels.
Subject Headings: Roofs | Protective structures | Shallow foundations | Blasting effects | Load tests | Reinforced concrete | Dynamic tests | Structural deflection
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