Modeling Permanent Deformation of Unbound Granular Materials under Repeated Loads
Publication: International Journal of Geomechanics
Volume 10, Issue 6
Abstract
Finite-element analysis on a pavement structure under traffic loads has been a viable option for researchers and designers in highway pavement design and analysis. Most of the constitutive drivers used were nonlinear elastic models defined by empirical resilient modulus equations. Few isotropic/kinematic hardening elastoplastic models were used but applying thousands of repeated load cycles became computationally expensive. In this paper, a cyclic plasticity model based on fuzzy plasticity theory is presented to model the long-term behavior of unbound granular materials under repeated loads. The discussion focuses on the model parameters that control long-term behavior such as elastic shakedown. The performance of the constitutive model is presented by comparing modeled and measured permanent strain at various numbers of load cycles. Calculated resilient modulus from the complete stress-strain curve is also discussed.
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Acknowledgments
The support from the Mid-America Transportation Center is greatly appreciated. The financial support from the China Scholarship Council (Grant No. UNSPECIFIED[2007]3020) and the Hunan Provincial Educational Department (Grant No. UNSPECIFIED06C832) is also acknowledged.UNSPECIFIED
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Information
Published In
International Journal of Geomechanics
Volume 10 • Issue 6 • December 2010
Pages: 236 - 241
Copyright
© 2010 ASCE.
History
Received: Jul 16, 2009
Accepted: Mar 16, 2010
Published online: Mar 19, 2010
Published in print: Dec 2010
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