00985875

Component

https://doi.org/10.3141/1896-09

http://scholar.google.com...iday&publication_year=2004

The effects on airport runways of impact loads induced by hard landings of heavy aircraft have been investigated. A hard landing is defined as a landing in which the angle of landing by a single-wheel impact load is greater than the static load for the same aircraft, with inclusion of the effects of the shock-absorption system. A numerical model, based on some earlier work by others, was developed to define the impact load for any given landing angle. With the impact-load values calculated from the model, theoretical stresses and strains were computed by existing elastic-layer and finite-element computer programs. The results indicated that tensile strains at the base of the asphalt layer and compression strains at the top of the subgrade could be up to 10 times as high under impact loading than under static loading. The study concluded that impact loads caused by angles of landing between 0.2 and 0.8 above horizontal were not greater than the static load of the aircraft (upon which current design standards are based). However, at angles of landing greater than about 0.8, the fatigue cracking and permanent deformation of airport runway pavements increased exponentially with an increase in landing angle. As a result of this study, the effects of impact loads due to hard landings were demonstrated to be sufficiently significant to be considered in the design of airport runway pavements.

This paper appears in Transportation Research Record No. 1896, Pavement Design and Accelerated Testing 2004.

00985866

English

p. 88-95

2004

Transportation Research Record

0309094895

Figures (6) ; References (11) ; Tables (1)

Airport runways; Fatigue (Mechanics); Impact loads; Landing; Pavement cracking; Pavement design; Rutting; Strain (Mechanics); Stresses

Hard landings; Heavy aircraft; Landing angle

Aviation; Design; Highways; Pavements; Terminals and Facilities; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Feb 10 2005 12:00AM

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• CALIBRATION OF MECHANISTIC-EMPIRICAL PERFORMANCE MODEL FOR CONTINUOUSLY REINFORCED CONCRETE PAVEMENT PUNCH-OUTS
• COMPUTER-BASED MULTIMEDIA PAVEMENT TRAINING TOOL FOR SELF-DIRECTED LEARNING
• DEVELOPING SOFTWARE FOR ELASTIC ANALYSIS OF PAVEMENT STRUCTURE RESPONSES TO VERTICAL AND HORIZONTAL SURFACE LOADINGS
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• FATIGUE CRACKING MECHANISMS IN ASPHALT PAVEMENTS WITH VISCOELASTIC CONTINUUM DAMAGE FINITE-ELEMENT PROGRAM
• FATIGUE-TRANSFER FUNCTIONS: HOW DO THEY COMPARE?
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• INTERLAYER AND DESIGN CONSIDERATIONS TO RETARD REFLECTIVE CRACKING
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• MECHANISTIC-EMPIRICAL MODEL TO PREDICT TRANSVERSE JOINT FAULTING
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• ONE-WAY AND TWO-WAY DIRECTIONAL HEAVY-VEHICLE SIMULATOR LOADING: EFFECTS ON RUTTING IN HOT-MIX ASPHALT PAVEMENTS
• PERFORMANCE OF COLD IN-PLACE RECYCLING IN NEVADA
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• TIRE-INDUCED SURFACE STRESSES IN FLEXIBLE PAVEMENTS
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