Three dimensional simulation of virtual triaxial shear test for asphalt mixture based on discrete element method

被引：2
作者：
Yang, Jun [1 ]
Jiao, Liya [1 ]
Wang, Keli [2 ]
Zhang, Jiantong [1 ]
机构：
[1] School of Transportation, Southeast University, Nanjing
[2] China Shandong International Economic and Technical Cooperation Group Co., Ltd., Jinan
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2014年 / 44卷 / 05期
关键词：
Asphalt mixture; Coarse aggregate phase; Discrete element method; Microscopic structure; Triaxial shear test;
D O I：
10.3969/j.issn.1001-0505.2014.05.032
中图分类号：
学科分类号：
摘要：
A mesoscopic mechanic structure model of asphalt mixture is established based on the discrete element method and validated by using the virtual triaxial shear tests. First, a coarse aggregate generation algorithm is developed based on the working mechanism of the square sieve system, aggregates with irregular shapes are generated, making the shape control of coarse aggregate diversified and precise. Then, the air void phase with actual longitudinal distribution scenario is introduced into the mesoscopic structure model of asphalt mixture, which substitutes the random distribution in traditional methods. The contact constitutive parameters of asphalt mastic at medium and high temperatures are obtained by combing laboratory tests and virtual tests. The simulation results of virtual triaxial shear tests and the predictive results for anti-shear strengths of asphalt mixture verify the reasonableness of the proposed mesoscopic mechanic structure model. The shear damage modes from the laboratory tests and those of the actual specimens are similar, and the shear strengths of laboratory tests generally agree with the actual results.
引用
收藏
页码：1057 / 1061
页数：4
相关论文
共 12 条
  • [1] Tian L., Liu Y., Xia G., Et al., Random generation algorithm for simulation of polyhedral particles in asphalt mixture aggregate and its program , China Journal of Highway and Transport, 20, 3, pp. 5-10, (2007)
  • [2] Wang L.B., Myers L.A., Mohammad L.N., Et al., Micromechanics study on top-down cracking, Transportation Research Record: Journal of the Transportation Research Board, 1853, 1, pp. 121-133, (2003)
  • [3] You Z., Buttlar W.G., Discrete element modeling to predict the modulus of asphalt concrete mixtures , Journal of Materials in Civil Engineering, 16, 2, pp. 140-146, (2004)
  • [4] Puzinauskas V.P., Influence of mineral aggregate structure on properties of asphalt paving mixtures , Highway Research Record, 51, pp. 1-18, (1964)
  • [5] Benson F.J., Effects of aggregate size, shape, and surface textures on the properties of bituminous mixtures-a literature survey , Highway Research Board Special Report, 109, pp. 12-22, (1970)
  • [6] Kandhal P.S., Cooley L.A., The Restricted Zone in the Superpave Aggregate Gradation Specification, (2001)
  • [7] Barksdale R.D., Pollard C.O., Siegel T., Et al., Evaluation of the Effects of Aggregate on Rutting and Fatigue of Asphalt, (1992)
  • [8] Lu M., McDowell G.R., The importance of modelling ballast particle shape in the discrete element method , Granular Matter, 9, 1-2, pp. 69-80, (2007)
  • [9] Tian L., Liu Y., Wang B., 3D DEM model and digital restructure technique for asphalt mixture simulation, Journal of Chang'an University: Natural Science Edition, 27, 4, pp. 23-27, (2007)
  • [10] Masad E., Muhunthan B., Shashidhar N., Et al., Quantifying laboratory compaction effects on the internal structure of asphalt concrete , Transportation Research Record: Journal of the Transportation Research Board, 1681, 1, pp. 179-185, (1999)
12