关键词: 横拱坡度, 疲劳破坏, 疲劳寿命差异系数, 重心高度, 轴载

Abstract: In order to study the variance of the pavement fatigue failure under two different wheels caused by crown, the variance of pavement fatigue failure caused by the crown was computed using the finite element software(ANSYS). Fatigue lifetime of the pavement structure under the standard axle loading was calculated, and the concept of coefficient of different fatigue life was also put forward. The variance of sheering fatigue failure of surface and the tensile fatigue failure of sub-base under two different wheels was studied, respectively. The phenomenon was explained that the alligator crack or fissure of pavement under the right wheel is always heavier than that under the left wheel. The fatigue lifetimes of pavement under two different wheels were different. Furthermore, the variance coefficient of two sides' fatigue lives will increase rapidly with the crown increasing, as well as the increase of the height of gravitational center.

Key words: crown, fatigue failure, coefficient of different fatigue life, height of gravitational center, axle load