Comparison of Soil Moduli Obtained from Non-Destructive Dynamic Testing and Constitutive Equations
Final rept. Jun 1977-May 1978
CLARKSON COLL OF TECHNOLOGY POTSDAM NY DEPT OF CIVIL AND ENVIRONMENTAL ENGINEERING
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This report describes an effort to determine the degree of agreement between moduli of airfield granular base materials as measured by a non- destructive vibratory pavement evaluation procedure and as predicted from constitutive equations that relate moduli to states of stress induced in the granular material by aircraft loading. The results indicated that for the tensile state of stress that is induced by heavy aircraft loads, Youngs modulus of the granular materials considered in the study was approximately inversely proportional to the square root of the state of stress. This could be postulated from the knowledge that for compressive state of stress, Youngs modulus is approximately directly proportion to the square root of the state of stress. It was concluded that the moduli of the pavement granular base materials studied which were measured in the field in the Air Force non-destructive pavement evaluation procedure and then reduced to account for low strain levels are in agreement with the moduli determined from empirical constitutive equations.
- Soil Mechanics
- Civil Engineering