Three-dimensional Finite Element Analysis of Load Stress at the Bottom of Old Cement Concrete Pavement Asphalt

Reflective cracking is one of the main forms of early damage in the old cement concrete pavement asphalt overlays.The load stress concentration in the corresponding place of the bottom of asphalt overlay is the main reason for reflective crack.In this paper,the establishment of finite element model for Cement Concrete Pavement Asphalt overlays method is used to calculate the influence when the wheel load is located in the most unfavorable position,and calculate the impact of load stress of asphalt layer thickness and axial load capacity of the asphalt layer.The calculation provides a reference for the prevention or slowing down of the reflective cracking.