DYNAMIC TEST OF A MODEL FLEXIBLE-ARCH-TYPE PROTECTIVE SHELTER. REPORT I. PILOT TEST.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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The general objective of the pilot test reported herein was to determine the response of a small-scale, buried, flexible-arch troop shelter to a simulated nuclear blast overpressure. To accomplish this, a model structure was constructed using a scaling ratio of 1 to 4.5. The model structure was buried in dense, dry sand with depth of cover equal to one-quarter the diameter of the arch. The test was conducted in the Waterways Experiment Station Large Blast Load Generator at an overpressure of about 85 psi. Strain, acceleration, and deflection were measured at various points on the structure along with pressure in the free field and overpressure at the soil surface. The only serious damage observed was a shear failure of the bolt connections between the bulkhead columns and the end trusses. The results of this study will be used to plan further tests of the structure.
- Structural Engineering and Building Technology