Abstract
Based on the multi-layer elastic system theory, large general used finite element software is used to analysis in the paper. The pavement structure layer bottom three-direction maximal shear stress SXY, SYZ and SXZ are computed under the different axis load for four kind combinations. Through contrasting the three direction shear stress, the paper obtained some curves and laws about the pavement structure layer bottom three-direction shear stress along with the axis load change.
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