Shear Stress Analysis of Asphalt Concrete Pavement Under Super-Heavy Traffic

Shear-induced damage is one of the major distresses of asphalt concrete pavement.Super-heavy vehicles make it more serious.A series of three-dimension(3D) finite element analysis is performed using ABAQUS to quantify impact of tire pressure on shear stress in asphalt concrete pavement with semi-rigid base.According to comparison of shear stress distributions in asphalt concrete pavement under various tire pressure,impacts of super-heavy vehicle on asphalt concrete pavement are evaluated.It shows that the maximum principle shear stress is in the surface of asphalt concrete layer under the tire pressure and friction.The maximum principle shear stress increases with tire pressure growth in a linear way.Modified asphalt concrete or stone matrix asphalt,which has higher shear strength,should be used as top layer for asphalt concrete pavement under super-heavy traffic.Asphalt concrete with larger shear strength should also be employed for middle layer of asphalt concrete pavement.