EGEL
Energy GeoEngineering Laboratory

Numerical Simulation of Inverted Pavement Systems

Numerical Simulation of Inverted Pavement Systems

​Cortes, D., Shin, H., and Santamarina, J. (2012). "Numerical Simulation of Inverted Pavement Systems." J. Transp. Eng., 138(12), 1507-1519.
​Cortes, D., Shin, H., and Santamarina, J.
Pavement modeling; Constitutive model; Inverted pavement; Particulate media; Finite element; Resilient modulus
2012
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.