Dynamic Response of Concrete Arch Bunkers; Event Dial Pack, Project LN314A.
Abstract
Event Dial Pack, a 500-ton TNT surface burst detonated at the Defence Research Establishment, Suffield, Ralston, Alberta, Canada, on 23 July 1970, provided an opportunity to test and collect data pertinent to the design of structures to resist the airblast overpressure and ground motions resulting from a simulated nuclear detonation. The objective of Project LN314A, was to determine the gross response of buried prefabricated concrete arch shelters subjected to a traveling airblast overpressure wave. The particular concrete arch tested was originally designed and evaluated to resist conventional weapons and to meet certain requirements as to size, weight, ease of installation, and ease of transportability. Three 1/2-scale arches were tested at Event Dial Pack. One was located at 90 psi and two at 49 psi. The structures were buried in pits with a compacted soil below the footings and then backfilled with native soil with 2 feet of soil above the crown. The motion response of the structures was generally in the vertical direction. The vertical displacement was from 1-1/2 to 2-1/2 inches. Upon excavation and examination of the crack patterns, it was determined that the damage mechanism in all three cases was the same, only varying in degree. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1971
- Accession Number
- AD0726969
Entities
People
- Robert K. Mcgrath