Accession Number : AD0727678

Title :   The Dynamic Response of a Simulated Buried Arch to Blast Loading.

Descriptive Note : Final rept. Sep 68-Aug 70,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Kennedy,Thomas E.

Report Date : JUL 1971

Pagination or Media Count : 58

Abstract : A method of analysis for buried arches with footings was developed to predict their response to a nuclear airblast overpressure. The method of analysis was formulated by considering the arch ring as a discrete model consisting of a finite number of nodes (flexible joints) connected by rigid bars initially of equal length. The results of laboratory and field tests on 1/4.5- and 1/2-scale models, respectively, of an arch structure are compared with predictions made using the analysis. Arch internal loads, footing motions, and free-field motions are compared with those predicted by the analysis and compare favorably. The analytical technique was used to predict the response of the prototype structure to a 140-psi air overpressure loading resulting from the detonation of 10-kt, 100-kt, and 1-Mt weapons, to a 100-psi air overpressure for a 1-Mt weapon, and to the Operation Prairie Flat (500-ton TNT) 140-psi overpressure and the predicted response was compared with that assumed in designing the structure. The method of analysis developed is recommended whenever a significant cost savings can be realized because a number of structures are to be constructed or when local soil conditions make design by cruder methods uncertain. (Author)

Descriptors :   (*UNDERGROUND STRUCTURES, RESPONSE), (*NUCLEAR EXPLOSIONS, UNDERGROUND STRUCTURES), BLAST, SIMULATION, SURFACE BURST, FOUNDATIONS(STRUCTURES), JOINTS, SOIL MECHANICS, INTERACTIONS, MATHEMATICAL MODELS

Subject Categories : Structural Engineering and Building Technology
      Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE