基于Johnson-Cook黏塑性模型的沥青路面车辙计算  

Rutting Caculaiton of Asphalt Pavement Based on the Johnson-Cook Viscoplastic Model

作　　者：何兆益[1] 汪凡[1] 朱磊[1] 陆兆峰[1,2] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]重庆交通大学机电与汽车工程学院,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2010年第1期49-53,共5页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(50678183)

摘　　要：采用Johnson-Cook模型描述沥青混合料黏塑性本构关系,通过不同温度和不同应变率下单轴压缩试验确定沥青和改性沥青混合料的Johnson-Cook黏塑性模型参数,利用ANSYS瞬态动力学分析理论,分析了在设计年限内当量轴次和超载等不同条件下对沥青路面车辙变形的影响。结果表明:使用天然岩沥青改性沥青面层比基质沥青面层的抗车辙性能均提高20%,符合沥青路面车辙变形实际情况;基于Johnson-Cook黏塑性模型的车辙计算方法,为沥青路面车辙研究提供了一种新的思路和技术途径。The constitutive equation of asphalt mixture is described by the Johnson-Cook model. The model parameters of base asphalt mixture and modified asphalt mixture are gained by uniaxial compression experiments of different temperatures and different strain rates. Based on the ANSYS transient dynamic theory, the effects of asphalt pavement rutting of the num- ber of equivalent axle load, temperature and overloading are analyzed. The results indicate the anti-rutting perforrnannce of nature rock asphalt modified asphalt mixture is 20% higher than the anti-rutting performannce of base asphalt mixture, which is consistent with the asphalt pavement rutting deformation of the actual situation. The rutting caculaiton method based on the Johnson-Cook viscoplastic model is put forward ,which provides a new method for asphalt pavement rutting analysis.

关 键 词：沥青路面 黏塑性 Johnson.Cook模型 车辙 有限元分析 

分 类 号：U416.217[交通运输工程—道路与铁道工程]