变温条件下考虑车辆-路面相互作用的车辙分析

发布时间：2018-03-15 02:33

本文选题：车-路相互作用　切入点：车辙　出处：《应用数学和力学》2017年02期 　论文类型：期刊论文

【摘要】：研究沥青路面结构的车辙问题,首先基于车辆与路面的相互耦合作用,建立路面不平整度引起的车辆荷载简化模型;然后根据沥青混合料蠕变试验数据,拟合出基于修正Burgers模型的沥青路面车辙的计算参数;最后结合气温观测数据,借助ABAQUS有限元软件,引入路面温度场,建立了考虑连续变温的日车辙预估计算模型.模拟了考虑车辆-路面相互作用的沥青路面在连续变温条件下的车辙变化规律,并分析研究了温度、车辆荷载以及车速对车辙的影响.结果表明,考虑车辆-路面相互作用得到的日累积车辙深度增大了6.5%,说明这一因素对沥青路面车辙的预测是不可忽略的;轴载及路面不平整度均与车辙量线性相关;而相同轴载作用下,温度越高,车辙增长越快,得到的车辙量越大;随着车速增大,车辙深度呈减小趋势,并且在车辆与路面发生共振的车速下,该文模型得到的结果增大了32%.
[Abstract]:In this paper, the rutting problem of asphalt pavement structure is studied. Firstly, based on the interaction between vehicle and pavement, a simplified model of vehicle load caused by pavement roughness is established, and then according to the creep test data of asphalt mixture, The calculation parameters of asphalt pavement rutting based on modified Burgers model are fitted. Finally, the temperature field of asphalt pavement is introduced with the help of ABAQUS finite element software and temperature observation data. A daily rutting prediction model considering continuous temperature variation is established. The rutting variation law of asphalt pavement with consideration of vehicle-pavement interaction is simulated, and the temperature is analyzed and studied. The effect of vehicle load and vehicle speed on rutting. The results show that the cumulative rutting depth increases by 6.5in consideration of vehicle-pavement interaction, which indicates that this factor can not be ignored in the prediction of asphalt pavement rutting. Under the same axle load, the higher the temperature, the faster the rutting growth, and the larger the rutting quantity, the more the rutting depth decreases with the increase of speed. The results obtained by the model increase by 32 when the vehicle has resonance with the road.
【作者单位】：西安建筑科技大学理学院;西安建筑科技大学土木工程学院;
【分类号】：U418.68

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