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Load Transfer Theoretical Analysis of a Rigid Aircraft Pavement Contraction Joint Using a Novel Approach for Crack
1School of Science, Technology and Engineering, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia.
Materials (Basel, Switzerland)
|January 28, 2026
Summary
Contraction joints in aircraft pavements are crucial for load transfer via aggregate interlock. This study found joint opening significantly impacts load transfer, suggesting a need for more realistic crack modeling in pavement design.
Area of Science:
- Civil Engineering
- Materials Science
- Geotechnical Engineering
Background:
- Contraction joints in rigid aircraft pavements are essential for structural integrity.
- Aggregate interlock is the primary mechanism for load transfer across these un-doweled joints.
- Current modeling of aggregate interlock stiffness as a simple spring may not capture complex joint interactions.
Purpose of the Study:
- To investigate the influence of crack shape and joint opening on aggregate interlock stiffness.
- To develop a more accurate model for aggregate interlock load transfer in aircraft pavements.
- To assess the significance of various factors on load transfer values.
Main Methods:
- Characterizing crack shape using an idealized two-dimensional sinusoidal model.
- Employing finite element methods to analyze load transfer.
- Evaluating the impact of load, sublayer conditions, and crack geometry.
Main Results:
- Joint opening was identified as the most significant factor influencing aggregate interlock load transfer.
- The study quantified the relationship between crack shape, joint opening, and load transfer efficiency.
- Finite element analysis provided insights into the complex mechanics of aggregate interlock.
Conclusions:
- The idealized sinusoidal crack shape provides a novel approach to modeling aggregate interlock.
- Joint opening is a critical parameter that must be accurately considered in pavement design.
- Further validation with field data is recommended to confirm the model's applicability.
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