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Title: Dynamic tests of a model flexible-arch-type protective shelter
Authors: United States. Army. Office of the Chief of Engineers.
Kennedy, T. E. (Thomas E.)
Keywords: Dynamic tests
Explosion effects
Model structures
Subsurface structures
Publisher: Weapons Effects Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; N-71-3.
Description: Miscellaneous paper
Abstract: The general objective of this study was to determine the dynamic response of a buried model flexible-arch troop shelter to simulated nuclear blast overpressures. To accomplish this, a model structure was constructed using a geometric scaling ratio of 1 to 4.5. The structure was buried in dense, dry sand with the depth of cover over the crown equal to one-fourth of the arch diameter and tested in the Waterways Experiment Station Large Blast Load Generator. A series of five tests was conducted at overpressures ranging from 37 to 177 psi with the model being excavated and rebuilt after each test. Strain, acceleration, and deflection were measured at various points on the structure; measurements were also made of the pressure inside the structure, stress and acceleration in the free field, and overpressure at the soil surface. Visible damage consisted of arch deformation, footing deflection, and fracture of the end truss bulkhead connector at the higher overpressures. All transient measurements in general were recorded successfully. The results of this study show that the model structure as designed can withstand almost twice the design overpressure of 100 psi for large duration times (100 to 200 msec). Redesign of the truss connector can be accomplished as detailed in Appendix D so that no fracture occurs in this area. The instrumentation employed is described in detail in Appendix A. Raw and computed data are contained in Appendixes B and C, respectively.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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