Numerical Simulation of Inverted Pavement Systems
Publication: Journal of Transportation Engineering
Volume 138, Issue 12
Abstract
Conventional pavements rely on stiff upper layers to spread traffic loads onto less rigid lower layers. In contrast, an inverted pavement system consists of an unbound aggregate base compacted on top of a stiff cement-treated base and covered by a relatively thin asphalt concrete layer. The unbound aggregate interlayer in an inverted pavement experiences high cyclic stresses that incite its inherently nonlinear granular media behavior. A physically sound, nonlinear elastoplastic material model is selected to capture the unbound granular base in a finite-element simulator developed to analyze the performance of inverted pavement structures. The simulation results show that an inverted pavement can deliver superior rutting resistance, as compared with a conventional flexible pavement structure with similar fatigue life.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 138 • Issue 12 • December 2012
Pages: 1507 - 1519
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Nov 7, 2011
Accepted: Jun 13, 2012
Published online: Nov 15, 2012
Published in print: Dec 1, 2012
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