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- Title
Numerical Simulation of Inverted Pavement Systems.
- Authors
Cortes, D. D.; Shin, H.; Santamarina, J. C.
- 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.
- Subjects
PAVEMENT design &; construction; MINERAL aggregates; COMPUTER simulation; LOADING &; unloading; ASPHALT concrete pavements; STRAINS &; stresses (Mechanics); FINITE element method
- Publication
Journal of Transportation Engineering, 2012, Vol 138, Issue 12, p1507
- ISSN
0733-947X
- Publication type
Article
- DOI
10.1061/(ASCE)TE.1943-5436.0000472