Journal ArticleDOI
Viscoelastic Modeling and Field Validation of Flexible Pavements
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TLDR
In this paper, a three-dimensional finite element (FE) model was developed to simulate pavement responses to vehicular loading at different temperatures and speeds, and compared with field-measured pavement responses from the Virginia Smart Road.Abstract:
The objective of this study was to characterize hot-mix asphalt (HMA) viscoelastic properties at intermediate and high temperatures and to incorporate laboratory-determined parameters into a three-dimensional finite element (FE) model to accurately simulate pavement responses to vehicular loading at different temperatures and speeds. Results of the developed FE model were compared against field-measured pavement responses from the Virginia Smart Road. Results of this analysis indicated that the elastic theory grossly underpredicts pavement responses to vehicular loading at intermediate and high temperatures. In addition, the elastic FE model could not simulate permanent deformation or delayed recovery, a known characteristic of HMA materials. In contrast, results of the FE viscoelastic model were in better agreement with field measurements. In this case, the average error in the prediction was less than 15%. The FE model successfully simulated retardation of the response in the transverse direction and rapid relaxation of HMA in the longitudinal direction. Moreover, the developed model allowed predicting primary rutting damage at the surface and its partial recovery after load application.read more
Citations
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Stochastic finite element analysis of moisture damage in hot mix asphalt
TL;DR: In this paper, the use of finite element modeling utilizing mechanistic test results to evaluate the moisture susceptibility and variability of mixtures was illustrated, and the model was validated by the results from the flow number test.
Journal ArticleDOI
An analytical procedure for strain response prediction of flexible pavement
TL;DR: In this article, an analytical procedure was developed to predict pavement response using a mixed pool of tensile strains from instrumentation and 3D FE simulation, which can accurately and rapidly predict pavement strain response when traffic and environmental data are provided.
Journal ArticleDOI
Linear visco-elastic behavior of asphalt pavements: 3D-FE response models
TL;DR: In this paper, the linear visco-elastic behavior of asphalt mixes is analyzed using 3D-FE (finite elements) response models, which are very similar to the empirical ones (curviameter deflections).
References
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Book
Viscoelastic properties of polymers
TL;DR: In this article, the authors describe the nature of Viscoelastic behavior of polymeric systems and approximate relations among the linear Viscoels and approximate interrelations among the Viscelastic Functions.
Journal Article
Simple performance test for superpave mix design
TL;DR: In this paper, the authors present the findings of a research task to identify a simple test for confirming key performance characteristics of Superpave volumetric mix designs, including permanent deformation, fatigue cracking, and low-temperature cracking.
Journal ArticleDOI
Methods of interconversion between linear viscoelastic material functions. Part I-a numerical method based on Prony series
S.W. Park,R.A. Schapery +1 more
TL;DR: Schapery and Park as discussed by the authors presented an approximate analytical interconversion method for linear viscoelastic material functions based on a Prony series representation using experimental data from selected polymeric materials.
Development and validation of performance prediction models and specifications for asphalt binders and paving mixes
TL;DR: The SHRP A-005 project developed detailed pavement performance models to support these binder and mixture specifications and performance-based mixture designs as mentioned in this paper, which can predict the amount of fatigue cracking, thermal cracking and rutting in asphalt concrete pavements.
Journal ArticleDOI
Stress Relaxation Studies of the Viscoelastic Properties of Polymers
TL;DR: In this article, extensive studies of the viscoelastic properties of polymers undertaken in the author's laboratory by means of the method of stress relaxation are reviewed and a rather complete over-all picture of these phenomena seems to be emerging.