Bending Failure of Asphalt Pavement Materials under Vehicle-Road Interaction

被引：0
|
作者：
Gao P. [1 ]
Chen E. [1 ,2 ]
Chang W. [3 ]
Si C. [2 ]
Yan Z. [2 ]
机构：
[1] School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang
[2] State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang
[3] Hebei Qugang Expressway Development Co., Ltd., Dingzhou
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2020年 / 23卷 / 04期
关键词：
Asphalt material; Crack propagation; Discrete element; Flexural failure; Vehicle-road interaction;
D O I：
10.3969/j.issn.1007-9629.2020.04.025
中图分类号：
学科分类号：
摘要：
The bending damage of asphalt pavement bottom material under vehicle load was analyzed and the interaction discrete element model(DEM) of pavement and two-degree-of-freedom quarter vehicle was constructed. The vehicle-road interaction force under road irregular excitation was calculated and DEM model was used to calculate the dynamic response of asphalt pavement material at macro and micro scales. Bending failure experiments of surface asphalt material were carried out, and the strain field distribution of crack generation during asphalt loading was measured. The discrete element model of asphalt material was constructed by PFC2D, and the loading and failure process was simulated. The bending mesoscopic damage of the asphalt surface layer under the interaction of the vehicle and road was explored. It was found that after the elastic stage, micro-cracks begin to appear in the asphalt material. As the vehicle load increase, the macro-cracks converge in the weakest area of the material until failure. The numerical simulation was consistent with the experimental change trend. Results show that the voidage has a great influence on the cracking resistance of asphalt materials in a certain range of values. © 2020, Editorial Department of Journal of Building Materials. All right reserved.
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页码：912 / 919
页数：7
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