高模量沥青混凝土路面永久变形有限元分析

Finite Element Analysis on Permanent Deformation of High Modulus Asphalt Concrete Pavement

为研究高模量沥青混凝土路面的永久变形性能,运用ANSYS有限元软件对沥青路面结构进行建模,分别对轴载作用大小、中面层厚度、面层材料等因素影响沥青混凝土路面永久变形性能进行分析。得出结论:(1)中面层厚度的增加并不能有效降低路面结构的永久变形;(2)中面层材料选用高模量沥青混合料可有效提升路面结构的抗永久变形性能;(3)重载超载频繁的路面易发生永久变形现象,高模量沥青混合料可有效提升路面结构抗永久变形性能。

For the research of permanent deformation performance of high modulus asphalt pavement,by means of the ANSYS finite element software,modeling of asphalt pavement structure has been established,and analysis on influence of asphalt concrete pavement permanent deformation properties by factors including the axle load size,middle surface layer thickness,surface layer material and others has been respectively carried out. Such conclusions have been drawn as follows: 1) The increase of middle surface layer thickness cannot effectively reduce the permanent deformation of the pavement structure; 2) The adoption of high modulus asphalt mixture for the middle surface layer can effectively improve the resistance to permanent deformation of pavement structure; 3) As for pavement with frequent overload traffic,permanent deformation will easily arise,and the adoption of high modulus asphalt mixture can effectively enhance the pavement structure resistance to permanent deformation.