01123131

Component

https://doi.org/10.3141/2095-02

http://scholar.google.com...sler&publication_year=2009

Recent full-scale testing of airfield rigid pavements has demonstrated the possibility of top-down cracking in concrete slabs. The objective of this study was to identify critical gear positions that produced the maximum tensile stress on the top of airfield rigid pavements, given no initial curling. Three individual aircraft gear geometries (dual, dual tandem, and triple dual tandem) and four aircraft types—considering all their main landing gears (B-777, A-380, MD-11, and B-747)—were analyzed for several slab configuration, pavement geometry, and material assumptions. The two-dimensional finite element analysis results showed that consideration of the entire main landing gear of the aircraft was necessary if the top tensile stresses were to be predicted accurately, except for the B-777. The A-380 and MD-11 had the greatest top-to-bottom tensile stress ratios for the full-gear analysis (critical tensile stress at the transverse joint) when the body gears were placed on the same slab for the no-load transfer condition. A factorial analysis further demonstrated that the load transfer efficiency across the joints and the load configuration (single gear or full aircraft) were the most sensitive factors affecting the top tensile stress and top-to-bottom tensile stress ratios.

01145025

09-3327

English

pp 13-23

2009

Transportation Research Record: Journal of the Transportation Research Board

9780309126328

Print

Figures (7) ; References (33) ; Tables (2)

Airport runways; Finite element method; Landing gear; Load transfer; Pavement cracking; Pavement design; Rigid pavements; Slabs

Airbus A380; Boeing 747 aircraft; Boeing 777 aircraft; McDonnell Douglas MD-11

Tensile stresses; Top down cracking (Pavements)

Aviation; Design; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Jan 30 2009 7:44PM

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