The NCEL atomic blast simulator is intended for testing beams, beam-column connections, and other relatively narrow structural elements. This report describes the successful adaptation of the simulator for providing dynamic loads on a bearing plate on sand and presents some tentative results as a preliminary part of Task Y-F008-08-03-402, "Fundamental Behavior of Soils Under Time-Dependent Loads." The dynamic bearing capacity of a 15-inch-diameter bearing plate on dry sand without overburden was 90 percent higher than the static bearing capacity. Also, the dynamic bearing modulus was considerably higher than the static;e.g., 226 psi per inch dynamic versus 137.7 psi per inch static at 0.5 inch plate settlement.
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