车辆轴数和轮组对半刚性沥青路面极限轴载的影响

Effects of Axle Number and Wheel Group of Vehicle on Ultimate Axle Load for Semi-rigid Asphalt Pavement

通过对半刚性沥青路面典型结构进行有限元计算,探讨车辆轴数和轮组对路面极限轴载的影响。分析结果显示：轴数和轮组是影响半刚性沥青路面结构极限轴载的重要因素,路面的极限轴载随着车辆轴数或者轮组的增加而增大,增加轴数或者轮组可以提高半刚性沥青路面的极限轴载,保证路面的承载能力;极限轴载与轴型系数呈正比关系,轴型系数反映了轴数与轮组对极限轴载的综合影响;轮组相同时,随着轴数从单轴增加到双轴、三轴、四轴,轴型系数的增长率随轴数的增加而降低,为50%-27%-18%;轴数相同时,随着轮组从单轮组增加到双轮组、四轮组,轴型系数的增长率随轮组的增加而增加,为7.3%-13.5%。

Based on the finite element calculation of the pavement typical structure, the effects of axle number and wheel group of vehicle were explored for sembrigid asphalt pavement on ultimate axle load. Analysis showed that axle number and wheel group were important factors affecting ultimate axle load for sembrigid asphalt pavement structure. Ultimate axle load increased with axle number or wheel group increasing. Increasing axle number or wheel group might improve ultimate axle load of semi-rigid asphalt pavement, which could ensure the bearing capacity of pavement. Axletype coefficient that was proportional to ultimate axle load reflected the combined influence of axle number and wheel group. When wheel group remained the same, the increasing rate of axle-type coefficient decreased gradually with the in- creaseing of axle number and showed 50%-27%-18%, corresponding to axle number of one through four. When axle number remained the same, the increasing rate of axle-type coefficient increased gradually with the increasing of wheel group and showed 7.3%-13. 5%, corresponding to wheel groups of one, two and four.