关键词: 沥青路面, 接地面形状, 三维有限元, 力学响应

Abstract: When analyzing mechanical property of asphalt pavement, vehicle loading is considered to be transferred through tyres to the pavement and the interface between the tyres and pavement is assumed to be in regular geometric shapes to facilitate calculation. Three-dimentional finite element method was adopted to evaluate the response of asphalt pavement subjected to vehicle loading with variedtyre??pavement interfaces, including round, square, rectangular, elliptical,rectangular plus two semi-rounds, respectively. The results indicated that load ing through rectangular plus two semi-round interface imposed greatest effect on vertical displacement and shear stress of the whole pavement, as well as the tensile stress at the bottom of the surface upper layer. Loading through rectangular interface exerted greater influence on the tensile stress of the surface bottom layer than that of rectangular plus two semi-round in terface. Loading through round interface exhibited least effect on mechanical behavior of the pavement, though comparatively larger than square interface.

Key words: asphalt pavement, interface, three-dimentional finite element, mechanical behavior