Critical Stress Analysis of Large Aircraft on Airport Rigid Pavement Using FEAFAA

The critical stresses of large aircraft on the airport rigid pavement were analyzed using 3D finite element program, FEAFAA. Four large aircraft with multiple-gear structures, the A380, B747, A340-500, and A340-200, were selected for the analysis. The curling effect on top-down cracking prediction was investigated through the equivalent temperature gradient (ETG). Among the curling directions of downward curling, flat and upward curling, the upward curling shows the greatest critical top-to-bottom tensile stress ratio (t/b ratio), as expected. Also, for upward curling, the t/b ratio shows a high linear dependence on the ETG value for the considered ETG range. The critical gear position is identified for upward curling: a critical gear position exists for A340-500 and A340-200, and a critical gear area exists for B747 and A380. Finally, the sensitivity analysis for the A380 shows that: the t/b ratio is highly sensitive to the slab thickness and the elastic modulus of the subgrade, but insensitive to the elastic modulus of the slab, subbase thickness, and the elastic modulus of the subbase; the t/b ratio tends to increase as the elastic modulus of the subgrade and slab thickness increase; and the critical gear position can be regarded insensitive to the elastic modulus and thickness of each pavement layer, since it is always located in the critical gear area.

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• Supplemental Notes:
  • Abstracts reprinted with permission from the International Society for Concrete Pavements.
• Corporate Authors:

  International Society for Concrete Pavements

  6305 Oyster Bay Court
  Bridgeville, Pennsylvania  United States  15017
• Authors:
  • Chen, Yuanguo
  • Wang, Qiang
  • Brill, David R
• Conference:
  • 10th International Conference on Concrete Pavements
  • Location: Québec City Québec, Canada
  • Date: 2012-7-8 to 2012-7-12
• Publication Date: 2012

Language

• English

Media Info

• Media Type: Digital/other
• Features: CD-ROM; Figures; References; Tables;
• Pagination: pp 1050-1067
• Monograph Title: 10th International Conference on Concrete Pavements: Sustainable Solutions to Global Transportation Needs

Subject/Index Terms

• TRT Terms: Aircraft; Airport runways; Finite element method; Landing gear; Modulus of elasticity; Rigid pavements; Subbase (Pavements); Thickness
• Subject Areas: Aviation; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01497182
• Record Type: Publication
• ISBN: 978098602910
• Files: TRIS
• Created Date: Oct 30 2013 9:18AM