Load Transfer Theoretical Analysis of a Rigid Aircraft Pavement Contraction Joint Using a Novel Approach for Crack Characterization
Sean Jamieson, Greg White
TL;DR
This paper introduces a new method to analyze how cracks in aircraft pavement joints transfer loads, using a simplified sinusoidal crack shape model.
Contribution
A novel approach to crack characterization using an idealized two-dimensional sinusoidal shape for modeling aggregate interlock stiffness.
Findings
Joint opening was identified as the most significant factor affecting load transfer in contraction joints.
Finite element analysis showed the importance of crack shape in modeling aggregate interlock stiffness.
The proposed model needs further validation against field data for accuracy.
Abstract
The contraction joints within paver runs are important for the design and construction of rigid aircraft pavements. These joints are typically un-doweled and sawn into the pavement to induce a crack. The joints control shrinkage cracking during curing, allow for thermal expansion and contraction, and provide load transfer through aggregate interlock joint stiffness between adjacent slabs. Aggregate interlock joint stiffness is typically modeled by assigning a spring element between two slabs that is indicative of the stiffness of the joint. However, that simplification may not accurately represent the complex interaction of irregularly shaped concrete faces and joint openings. Consequently, previous researchers have recommended modelling aggregate interlock stiffness based on physical crack shape. This research uses a novel approach to characterize crack shape through an idealized…
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Taxonomy
TopicsAsphalt Pavement Performance Evaluation · Concrete Properties and Behavior · Engineering and Material Science Research