Computer Modeling Mechanical Analysis for Asphalt Overlay under Coupling Action of Temperature and Loads

Abstract Aiming at the lack of applied mechanics analysis of asphalt overlay on old cement pavement, based on elastic half-space theory, the three-dimensional finite element model is built. The coupling stresses of asphalt overlay on old cement pavement under vehicle load and temperature load are systematically studied, and based on this asphalt overlay typical structures suitable for different highway grades are recommended. The results show that the reasonable thickness of asphalt overlay is 6cm∼11 cm, the reasonable thickness of stress absorption interlayer is 2 cm, and asphalt overlay should adopt modified asphalt to improve its performance. Results provide the mechanics basis for design and construction of asphalt overlay.