In this paper,pavement performance index PCI,road surface deflection and pavement rutting are proposed as the design indexes of pavement structure by analyzing the desert region harsh natural environment under heavy load traffic asphalt pavement condition and using finite element analysis.We obtained the durability of the desert region asphalt pavement structure stress distribution.The results showed that different wheel load on road surface and the maximum vertical deformation has an approximate linear relationship.Along with increase of the axial load,the maximum vertical deformation gradually increases.The maximum tensile stress of the road surface is symmetrical distributed with the wheel axis.The shear stress in the pavement structure increases with the increase of depth,and the shear stress recches peak value at 5 cm away from road sorface.The research results can provide theoretical support and technical guidance for the selection and structural design of the asphalt pavement in the desert region.
YANG Sanqiang
,
LIU Na
,
ZHANG Shuai
,
DU Erxia
. Analysis of design index and structural mechanics of durabble asphalt pavement in desert areas[J]. Journal of Hebei University(Natural Science Edition), 2016
, 36(6)
: 574
-582
.
DOI: 10.3969/j.issn.1000-1565.2016.06.003
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