ABSTRACT
The influence of principle stress distribution on semi-rigid base asphalt pavement damage are analyzed. Three-dimensional finite element model under double-round uniform load was established for multi-layer asphalt pavement with semi rigid base and stress components of each node were analyzed based on Drucker-Prager (D-P) criterion. A new index, Asphalt Pavement Potential Damage Index (APPDI3D), was proposed. The results show that: The different components of the principle stress are corresponding to different pavement early failure under different temperature. Combined with the Mohr circle and the location in the pavement structure, APPDI3D can accurately predict the damage form of asphalt pavement, which provides a theoretical basis for the interpretation of pavement failure mechanism and optimization of pavement structure and material design.
