An Analysis of Pickett's Solution to Westergaard's Equation for Rigid Pavements
CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL
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Influence coefficients used by the Corps of Engineers for the development of design curves for rigid airfield pavements have been re-computed and extended to permit an expanded and more accurate analysis of large military aircraft such as the C-5A. Calculations were performed using a digital computer in conjunction with a more refined numerical integration technique. Results are compared with the original influence coefficients, and the impact of the more accurate extended table of influence coefficients is evaluated by employing the new and old influence coefficients to calculate edge stress resulting from several representative aircraft gear loads. It is also demonstrated that further accuracy can be obtained by using a non-linear interpolation scheme derived from a bivarient quadratic regression analysis in place of a linear interpolation procedure to extract intermediate values from the table of influence coefficients. Finally, other areas of research which may possibly lead to improvements in the Corps design procedure for rigid airfield pavements are suggested.
- Terminal Flight Facilities
- Civil Engineering