Parametric Studies of Layered Pavement Systems Using AFPAV Code with Fast Equation Solver.
Final rept. 15 Nov 73-30 Jun 74,
NEW MEXICO UNIV ALBUQUERQUE ERIC H WANG CIVIL ENGINEERING RESEARCH FACILITY
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The effort was concerned with the improvement of the nonlinear version of the AFPAV computer code to reduce the central processing CP time of the CDC 6600 computer in solving layered pavement problems. Parametric studies were also performed to determine the significance of several input parameters and their effects on significant output data. These parametric studies were based on factorial designs formulated according to the statistical analysis techniques employed in analyzing experimental results. The experiments in this case were computer analyses of layered pavement structures, which are idealized as prismatic solids, loaded by multiwheeled aircraft. The studies covered 1 the effects of the number of node points and the bandwidth on computer running time, and 2 the effects of layer properties including the nonlinear constitutive relationships of base and subgrade materials, load intensity, finite-element mesh size, etc., on the maximum surface deflection and the maximum tensile strain in the surface layer.
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