Consideration of Asphalt Viscoelastic Behavior Effects for Airfield Flexible Pavement Evaluation
Publication: Airfield and Highway Pavements 2023
ABSTRACT
The US Army Corps of Engineers (USACE) currently uses the Layered-Elastic Evaluation Program (LEEP) as part of its airfield pavement structural capacity evaluation procedures that does not explicitly account for asphalt viscoelastic material behavior. This paper evaluates the ramifications of this by comparing computed stress and strain conditions within a pavement structure using current USACE methods and by using a recently developed computer program LEAGL-VE (Layered Elastic Analysis of General Loadings-Viscoelastic). LEAGL-VE provides the response for a multi-layered viscoelastic system under moving normal, horizontal, and rotational loads. Data from operation of an RJ-85 fire tanker aircraft on an instrumented pavement was used for comparison of analysis programs. Results show that LEAGL-VE produces closer estimates to measured aircraft responses than the current LEEP code. Findings suggest that the proposed analytical method be considered in future mechanistic-empirical design and evaluation procedures.
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Published In
Airfield and Highway Pavements 2023
Pages: 151 - 161
History
Published online: Jun 13, 2023
ASCE Technical Topics:
- Air transportation
- Airport and airfield pavements
- Airports and airfields
- Analysis (by type)
- Asphalt pavements
- Computer analysis
- Engineering fundamentals
- Infrastructure
- Layered systems
- Material mechanics
- Material properties
- Materials characterization
- Materials engineering
- Pavements
- Rheology
- Stress (by type)
- Stress analysis
- Structural analysis
- Structural behavior
- Structural engineering
- Systems engineering
- Systems management
- Transportation engineering
- Viscoelasticity
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