Mechanistic Rutting Prediction Using a Two-Stage Viscoelastic-Viscoplastic Damage Constitutive Model of Asphalt Mixtures
Publication: Journal of Engineering Mechanics
Volume 139, Issue 11
Abstract
A two-stage viscoelastic-viscoplastic damage constitutive model and the corresponding parameters calibration method were briefly given. Then, the numerical algorithms of the proposed constitutive model were implemented based on a radial return mapping algorithm and realized using the user material subroutine in the well-known finite-element code. A rutting prediction method of asphalt pavement was proposed based on the two-stage viscoelastic-viscoplastic damage constitutive model along with a loading equivalence method. Laboratory wheel tracking tests under different temperatures, different loading levels, once variable amplitude loads, and step variable amplitude loads were conducted to evaluate the efficiency of rutting prediction. Finally, the test results were compared with finite-element simulated results. All the results indicate that the constitutive model and the corresponding rutting prediction method proposed in this paper can effectively represent the rutting developing rules under standard loading and complicated variable amplitude loading with reliable prediction accuracy. Meanwhile, the mechanism of rutting development can be characterized through analyzing the evolution rules of internal state variables based on the proposed constitutive model.
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Acknowledgments
The authors thank the anonymous reviewers for insightful comments and constructive suggestions, which helped to refine the original manuscript. This study is sponsored in part by National Science Foundation (NSF) Grant No. CMMI-0408390 and NSF CAREER Award No. CMMI-0644552, American Chemical Society Petroleum Research Foundation Grant No. PRF-44468-G9, National Natural Science Foundation of China Grant Nos. U1134206 and 51250110075, Jiangsu Natural Science Foundation Grant No. SBK200910046, Huoyingdong Educational Foundation Grant No. 114024, and Jiangsu Department of Construction Grant No. 20091210. The authors also thank Mr. Linghao Gu, who participated in numerical computation of rutting evolution.
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Information
Published In
Journal of Engineering Mechanics
Volume 139 • Issue 11 • November 2013
Pages: 1577 - 1591
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Aug 18, 2012
Accepted: Jan 30, 2013
Published online: Feb 1, 2013
Published in print: Nov 1, 2013
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