Abstract
The finite element calculation method was used and the principal stresses distribution in the asphalt pavement was analyzed. The damage index of the pavement structure is defined as asphalt pavement potential damage index(APPDI) based on the Drucker-Prager criterion, and the APPDI as the pavement structure damage index are applied. The results show that: (1) The most dangerous nodes of this example model appeared between rounds from the edge of round about 0 to 2cm and the place beneath the tire. The composition of the principal stresses are tensile and compression stress.(2) Failure modes are rutting and Bottom-up which are caused by tension-compression composite shear stress.
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