01368056

Component

https://doi.org/10.3141/2305-05

http://scholar.google.com....+Ye&publication_year=2012

Past and current rigid pavement thickness design procedures used by the FAA use single-slab free-edge loading stress analysis as the basis of design. The FAA’s rigid pavement design methods have assumed a 25% reduction in free-edge bending stress to account for the ability of properly designed joints to transfer load from slab to slab and reduce bending stress from heavy wheel loads. This percentage of reduction is actually changing continuously as a function of slab temperature, joint type, pavement age, and traffic. A systematic procedure is used to evaluate the joint load transfer percentage of stress reduction factor in greater detail with falling weight deflectometer (FWD) measurements, slab curvature measurements, and finite element method (FEM) structural analysis. Field measurements of joint stiffness and slab curling are presented and compared with FEM simulations calibrated to reproduce field measurements. With the use of calibrated FEM models, the full range of expected load transfer percentages is demonstrated for single-wheel loads, two-wheel gears, and four-wheel gears for a wide range of possible joint stiffness values. Top-down and bottom-up slab cracking stresses are compared. Slab curling measured from test sites is compared with slab curling calculated from FEM models. The calibration of an FEM model to reproduce detailed site measurements of joint stiffness, load transfer efficiency, and slab curvature combined is demonstrated.

01470561

12-4118

English

pp 43–53

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309263139

Print

Figures; References

Airport runways; Concrete pavements; Curling; Falling weight deflectometers; Finite element method; Load transfer; Measurement; Pavement design; Pavement joints; Slabs; Stiffness

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

TRIS, TRB, ATRI

Feb 8 2012 5:21PM

• Calibrating "Mechanistic–Empirical Pavement Design Guide" for North Carolina: Genetic Algorithm and Generalized Reduced Gradient Optimization Methods
• Comparison of Design Thicknesses for Flexible Airfield Pavement Based on Agency Limiting Subgrade Strain Criteria
• Concrete Pavement Joint Diagnostics with Ultrasonic Tomography
• Development of Mechanistic–Empirical Design Procedure for Fully Permeable Pavement Under Heavy Traffic
• Establishing Effective Linear Temperature Gradients for Ultrathin Bonded Concrete Overlays on Asphalt Pavements
• Evaluation of Representative Loading Frequency for Linear Elastic Analysis of Asphalt Pavements
• Improved Mechanistic–Empirical Continuously Reinforced Concrete Pavement Design Approach with Modified Punchout Model
• Induction Healing of Porous Asphalt
• Joint Load Transfer and Support Considerations for Jointed Precast Concrete Pavements
• Load and Resistance Factors and Design Parameter Offsets for "Mechanistic–Empirical Pavement Design Guide"
• Method for Evaluating Implications of Climate Change for Design and Performance of Flexible Pavements
• Modification of "Mechanistic–Empirical Pavement Design Guide" Procedure for Two-Lift Composite Concrete Pavements
• New Warping and Differential Drying Shrinkage Models for Jointed Plain Concrete Pavements Derived with Nonlinear Shrinkage Distribution
• Rational Use of Terminal Anchorages in Portland Cement Concrete Pavement
• Reliability-Based Mechanistic–Empirical Pavement Design with Statistical Methods
• Streamlining Use of "Mechanistic–Empirical Pavement Design Guide"
• Structural Coefficient of Open-Graded Friction Course