Application of Graded Finite Elements for Asphalt Pavements
Publication: Journal of Engineering Mechanics
Volume 132, Issue 3
Abstract
Asphalt paving layers, particularly the surface course, exhibit vertically graded material properties. This grading is caused primarily by temperature gradients and aging related stiffness gradients. Most conventional existing analysis models do not directly account for the continuous grading of properties in flexible pavement layers. As a result, conventional analysis methods may lead to inaccurate prediction of pavement responses and distress under traffic and environmental loading. In this paper, a theoretical formulation for the graded finite element method is provided followed by an implementation using the user material subroutine (UMAT) capability of the finite element software ABAQUS. Numerical examples using the UMAT are provided to illustrate the benefits of using graded elements in pavement analysis.
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Acknowledgments
We are grateful to the support from the SemMaterials (previously Koch Materials) Company and the National Science Foundation (NSF) through the GOALI Project No. NSFCMS 0219566 (Program Manager, P. N. Balaguru). We also thank three anonymous reviewers for their insightful remarks which contributed to improve the manuscript. Any opinions expressed herein are those of the writers and do not necessarily reflect the views of the sponsors.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 132 • Issue 3 • March 2006
Pages: 240 - 249
Copyright
© 2006 ASCE.
History
Received: Feb 25, 2004
Accepted: Jun 23, 2005
Published online: Mar 1, 2006
Published in print: Mar 2006
Notes
Note. Associate Editor: Arif Masud
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