Two-Stage Viscoelastic-Viscoplastic Damage Constitutive Model of Asphalt Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 25, Issue 8
Abstract
A two-stage viscoelastic-viscoplastic damage constitutive model is developed for describing different mechanical deformation response of asphalt mixtures under various loading conditions. The model decomposes total strain into viscoelastic and viscoplastic components with damage considered. The model is calibrated using the creep-recovery test for viscoelastic parameters and using the static triaxial creep test for viscoplastic parameters, respectively. The calibrated constitutive model is then validated using triaxial constant strain rate compression tests. The calculated volumetric deformation exhibits initial contraction caused by viscoelastic component of the model, followed by dilation caused by the viscoplastic damage component, which is consistent with the experimental phenomena. Results show that the model can reasonably represent the three-stage deformation of creep test as well as the hardening and softening stages of constant strain rate compression test.
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Acknowledgments
The authors are very thankful to anonymous reviewers for their insightful and constructive comments, which enabled them to improve the content of the original manuscript. This study is sponsored in part by the National Science Foundation (NSF) under Grant CMMI-0408390 and NSF CAREER Award CMMI-0644552, by the American Chemical Society Petroleum Research Foundation under Grant PRF-44468-G9, by National Natural Science Foundation of China under grant U1134206, by Jiangsu Natural Science Foundation under Grant No. SBK200910046, by Huoyingdong Educational Foundation under Grant No. 114024, and by Jiangsu Department of Construction under Grant No. 20091210. The authors are very grateful for the support.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 25 • Issue 8 • August 2013
Pages: 958 - 971
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jun 20, 2011
Accepted: Aug 3, 2012
Published online: Aug 25, 2012
Discussion open until: Jan 25, 2013
Published in print: Aug 1, 2013
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