01470815

Component

https://doi.org/10.3141/2305-16

http://scholar.google.com...tale&publication_year=2012

The mechanistic design of flexible pavement is usually done with linear elastic theory (LET); this process must use appropriate values of the equivalent asphalt concrete elastic modulus to evaluate stresses and strains in a linear elastic multilayer. The aim is to identify some relationships to estimate the value of loading frequency, representative of the real strain pulse frequency spectrum, to be used in calculating the stiffness modulus of the asphalt concrete layers. In this way, an equivalent linear elastic structural analysis can be conducted. To achieve this aim, many transient load simulations were performed with ViscoRoute software based on the viscoelastic model. After variables that affected the representative frequency value were detected, more than 215 variable combinations (representative of real conditions) were randomly generated. For each combination, viscoelastic analysis was conducted, and then the stiffness modulus and the corresponding loading frequency were backcalculated by minimizing the residuals between linear elastic and viscoelastic peak strains. The representative frequency values calculated for these configurations were related to the significant variables by means of a multivariate regression. The model was developed separately for each of the three directions according to the anisotropic behavior of pavement under moving loads. Finally, the procedure was validated by applying it to several climatic and load configurations of an existing pavement. A simple and useful tool is provided to take into account all significant parameters; the tool can be used in conjunction with LET for pavement design.

01470561

12-3686

English

pp 150-161

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309263139

Print

Figures; References; Tables

Asphalt pavements; Pavement design

Linear elastic analysis; Linear elastic theory; Loading frequency; Stiffness modulus; Viscoelastic analysis

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Jan 28 2013 4:32PM

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• 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
• Evaluating the Effect of Concrete Slab Curling on Joint Load Transfer Responses
• 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