BLAST LOADING OF SMALL BURIED ARCHES
Abstract
The objective of the work represented by this report was to gain information which will serve as a guide in developing design method for underground structures. In pursuit of this goal, preliminary tests have been conducted on small buried arches to determine the influence of the dominant parameters. Information has been obtained on the response to long-, medium-, and short-duration blast loads including the deflection, thrust, and moment patterns. One static test also was performed. Curves showing the form of arching under static and blast loading are given. In addition, buckling and the variation of interface pressure are discussed briefly. The response of the buried arches consisted primarily of a body motion upon which was superimposed the first inextensional symmetrical mode of vibration. As the entire structure moved downward, the sides moved outward slightly and then inward. It was evident that the passive pressures which developed on the sides played the dominant role in providing resistance. It has been found that in static tests some of the surface load is carried by arching through the soil. In the dynamic tests the inertial forces of the soil above the arch were found to be important. The inertial load overcame the soil shear resistance so that a load approximately equal to the surface load octed on the structure. A model analysis of the system and subsequent comparison of the deflections from the small-structure tests and the Operation Plumbbob Structure 3.3 tests indicate that modeling of deflections is possible.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1963
- Accession Number
- AD0403113
Entities
People
- C. R. White
- H. L. Gill
- J. R. Allgood
- R. F. Swalley
Organizations
- Naval Facilities Engineering Service Center