The Elastic Response of Buried Cylinders in Sand.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
Pagination or Media Count:
The objectives of the study were to investigate the elastic response of a relatively stiff steel cylinder buried in a dense, dry sand and to compare this response with that predicted by elastic theory. Three series of tests were conducted on a steel cylinder under both static and dynamic loading conditions. The cylinder had a test section length of 12 in. and a diameter of 6 in. The surface overpressures ranged from 0 to 350 psi, static, and from 100 to 250 psi, dynamic. The depth of cover over the crown ranged from 0 to 12 in. The results show that the dynamic strains are 0 to 40 percent higher than the strains at an equivalent static load, contradictory to elastic predictions of 10 to 20 percent. The maximum experimental hoop strains were measured on the outside at 180 deg however, the elastic theory predicted the maximum strain to occur on the inside at 90 deg. Additionally, it was evident that strains or response are not a linear function of overpressure. Both the static and dynamic elastic theories compared in the study appear to be inadequate to predict the cylinder response for all overpressure levels. Author