[1] Zhang Deyu, Huang Xiaoming, Gao Ying,. Virtual rutting test of asphalt mixtureusing discrete element method [J]. Journal of Southeast University (English Edition), 2012, 28 (2): 215-220. [doi:10.3969/j.issn.1003-7985.2012.02.015]
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Virtual rutting test of asphalt mixtureusing discrete element method(
)
基于离散元法的沥青混合料虚拟车辙试验
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 28
- Issue:
- 2012 2
- Page:
- 215-220
- Research Field:
- Traffic and Transportation Engineering
- Publishing date:
- 2012-06-30
Info
- Title:
- Virtual rutting test of asphalt mixtureusing discrete element method
- 基于离散元法的沥青混合料虚拟车辙试验
- Author(s):
- Zhang Deyu; Huang Xiaoming; Gao Ying
- School of Transportation, Southeast University, Nanjing 210096, China
- PACS:
- U414
- DOI:
- 10.3969/j.issn.1003-7985.2012.02.015
- Abstract:
- In order to investigate the permanent deformation behavior of asphalt mixtures from discontinuity, the virtual rutting test of asphalt mixtures is developed by the discrete element method(DEM). A digital specimen generation procedure considering aggregate gradation and irregular shape is developed based on the probability theory and the Monte Carlo method. The virtual rutting test is then conducted based on the generated digital specimen. In addition, on the basis of the time-temperature superposition(TTS)principle, a calculation method is used to reduce the computation time of the virtual rutting test. The simulation results are compared with the laboratory measurements. The results show that the calculation method based on the TTS principle in the discrete element(DE)viscoelastic model can significantly reduce the computation time. The deformation law of asphalt mixtures in the virtual rutting test is similar to the laboratory measurements, and the deformation and the dynamic stability of the virtual rutting test are slightly greater than the laboratory measurements. The two-dimensional virtual rutting test can predict the permanent deformation performance of asphalt mixtures.
- 为了从沥青混合料不连续特征角度研究其永久变形行为, 采用离散元方法进行了沥青混合料虚拟车辙试验.根据概率理论及蒙特卡洛方法, 编写了考虑集料级配及不规则形状的沥青混合料二维数字试件生成程序.在生成的数字试件基础上进行了沥青混合料离散元虚拟车辙试验, 并利用基于时温等效原理的计算方法以减少虚拟车辙试验的计算时间.最后将模拟结果与室内试验结果进行了比较.研究结果表明:基于时温等效原理的离散元黏弹性模型计算方法可以大大减少计算时间;虚拟车辙试验中沥青混合料变形情况与室内车辙试验相似, 虚拟车辙试验的变形量及动稳定度略大于室内车辙试验;建立的沥青混合料二维虚拟车辙试验能够预测沥青混合料的永久变形性能.
References:
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[8] Kim H, Wagoner W P, Buttlar W G. Simulation of fracture behavior in asphalt concrete using a heterogeneous cohesive zone discrete element model [J]. Journal of Materials in Civil Engineering, 2008, 20(8):552-563.
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[11] Liu Y, Dai Q L, You, Z P. Viscoelastic model for discrete element simulation of asphalt mixtures [J]. Journal of Engineering Mechanics, 2009, 135(4): 324-333.
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Memo
- Memo:
-
Biographies: Zhang Deyu(1986—), male, graduate; Huang Xiaoming(corresponding author), male, doctor, professor, huangxm@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51108081).
Citation: Zhang Deyu, Huang Xiaoming, Gao Ying. Virtual rutting test of asphalt mixture using discrete element method[J].Journal of Southeast University(English Edition), 2012, 28(2):215-220.[doi:10.3969/j.issn.1003-7985.2012.02.015]