Meeting the Challenge: Rebuilding Inner City Airports.Order URL: Īmerican Society of Civil Engineers 345 East 47th Street Find a library where document is available.Although the results and conclusions of this study are based on FWD data collected on highway pavements, the nondestructive evaluation methodology is also applicable to airport or other heavy duty concrete and asphalt pavements.
The backcalculated moduli agree reasonably well with the laboratory data.
#Backcalculation modulus 6.5 cracked#
Moduli for an uncracked pavement, for pavements having cracks and for a cracked pavement with voids beneath the concrete layer are backcalculated by matching finite-element simulation results to FWD deflection measurements. Specifically, simulation models of a jointed plain concrete in-service pavement were developed following a detailed visual distress survey, coring, and nondestructive evaluation of selected sections. Results of three-dimensional finite-element dynamic analyses of uncracked and deteriorated pavements subjected to a standard falling weight deflectometer (FWD) loading are presented in this paper. THREE-DIMENSIONAL FINITE-ELEMENT SIMULATION OF FWD LOADING ON PAVEMENT SYSTEMS TABLE 3 Backcalculated Pavement Layer Thicknesses and Moduli from Velocity and Deflection Methods in Pennsylvania and Idaho Roads TSD Backcalculated Moduli (Velocity Method) LE Dual circular Loading (Deflec-tion Method) Penn Route 144 Layer Thickness (in) Modulus (ksi) Modulus (ksi) AC 6.5 181-267 270 BASE 8.25 43 41 SG 55 22 20.5 Stiff Layer.
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