[01] Mohammed Abbas Hasan Al-Jumaili, Department of Civil Engineering, Faculty of Engineering, University of Kufa, Najaf City, Iraq.

This paper studied the application of 3-D Plaxis software on reinforced asphalt concrete pavement with geogrid layer at two positions within the pavement structure to investigate effect of geogrid on the critical pavement responses such as total stress and vertical surface displacement. An axisymmetric finite element model was loaded with an incremental cycling contact pressure from 50 to 600 kPa and the geogrid layer was placed either at the bottom of surface asphalt concrete or at top of subbase course to study influence of geogrid position on pavement performance. The analysis results indicated that under various tire pressure values, a significant effect on the pavement behaviour was observed when the geogrid layer was located at bottom of asphalt concrete surface layer. The Plaxis output results also showed a moderate improvement in pavement system response was obtained when geogrid reinforcement layer was placed at top of subbase layer.

Asphalt Concrete, Georid, 3-D Plaxis and Vertical Displacement

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