车辆多轴恒动载作用下柔性路面疲劳寿命研究  

Research of Fatigue Life of Asphalt Pavement under Multiaxial Moving Constant Dynamic Loads of Vehicle

作　　者：陈洋[1] 高攀[1] 戴宗宏 刘大维[1] 

机构地区：[1]青岛大学机电工程学院,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2016年第3期90-94,共5页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国家自然科学基金项目(51475248)

摘　　要：为研究车辆多轴移动恒动载作用下柔性沥青路面的疲劳寿命,采用有限元分析软件ABAQUS建立考虑柔性沥青路面粘弹性的三维有限元模型,计算车辆多轴移动恒动载作用下柔性沥青路面应变响应,并应用应变疲劳模型对柔性沥青路面进行疲劳寿命预测。预测结果表明,在车辆多轴移动恒动载作用下,沥青各层的3个方向应变响应均不相同,沥青下面层底面的横向拉应变数值最大;以车辆前轴和中、后轴车轮的路面疲劳损伤度代替其他轴的路面疲劳损伤度,预估路面疲劳寿命分别为2.813×1011和1.037×1011,相对于以车辆前轴和中、后轴车轮的路面疲劳损伤度,一起预估路面疲劳寿命分别增大114.08%和减小21.08%。该研究可为路面结构的设计与路面寿命评估提供参考依据。In order to study the fatigue life of asphalt pavement under multiaxial moving constant dynamic loads of vehicle,the finite element model of flexible asphalt pavement considering viscoelastic is established by finite element analysis software ABAQUS.It calculates the flexible asphalt pavement strain response under multiaxial moving constant dynamic loads of vehicle and the fatigue life of asphalt pavement is predicted using strain fatigue model.The results show that each asphalt layer's strain response in three directions is different under multiaxial moving constant dynamic loads of vehicle and the transverse tensile strain is the largest.The pavement fatigue life is 2.813×1011and 1.037×1011 by using the pavement fatigue damage of the front axle wheels and the middle,rear axle wheels of vehicle in place of other axle wheels' pavement fatigue damage.The fatigue life increases 114.08%and decreases 21.08%,respectively,comparing with the pavement fatigue life by using the pavement fatigue damage of the front,middle and rear axle wheels of vehicle.The results may provide a reference for the design of the flexible asphalt pavement structure and the evaluation of pavement life.

关 键 词：重型车辆 多轮动载 柔性沥青路面 疲劳分析 数值模拟 有限元 

分 类 号：U416.217[交通运输工程—道路与铁道工程]