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Title:

Airfield Flexible Pavement Responses Under Multiwheel Gear Loading: Full-Scale Testing and Numerical Modeling

Accession Number:

01660204

Record Type:

Component

Abstract:

This study aimed to investigate the effect of multi-wheel loading gear configuration on loading-induced failure potential of airfield flexible pavements. Field response testing was conducted in National Airport Pavement Test Facility (NAPTF) using different multi-wheel gear configurations. Three-dimensional (3-D) finite element (FE) models were developed to simulate multi-wheel loading along with non-uniform tire contact stresses. The 3-D FE models were validated by tensile strains measured from response testing and comprehensive analysis of strain responses in the asphalt is conducted. Analysis results concluded that the six-wheel gear configuration caused the greater tensile strains at the bottom of asphalt layer and shear strains at pavement near-surface. The magnitudes of critical shear strain are greater than the ones of critical tensile strains at the same loading condition and pavement structure, especially for the thicker asphalt pavement. This is consistent with the top-down cracks observed at field sections after traffic testing. On the other hand, the shear strain increases more rapidly as the load level increases as compared to the tensile strain; while the thinner asphalt layer is more sensitive to the loading level as compared to the thicker asphalt layer. The effects of moving speed have significant effect on fatigue cracking potential of airfield pavement especially when the aircraft is taxiing at low speeds.

Supplemental Notes:

This paper was sponsored by TRB committee AV070 Standing Committee on Aircraft/Airport Compatibility. Alternate title: Airfield Flexible Pavement Responses under Multi-Wheel Gear Loading.

Report/Paper Numbers:

18-03441

Language:

English

Authors:

Wang, Hao
Li, Maoyun
Garg, Navneet
Li, Qiang

Pagination:

4p

Publication Date:

2018

Conference:

Transportation Research Board 97th Annual Meeting

Location: Washington DC, United States
Date: 2018-1-7 to 2018-1-11
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References

Subject Areas:

Aviation; Pavements

Source Data:

Transportation Research Board Annual Meeting 2018 Paper #18-03441

Files:

TRIS, TRB, ATRI

Created Date:

Jan 8 2018 10:51AM