Journal of South China University of Technology(Natural Science) >

2024 , Vol. 52 >Issue 10: 101 - 111

DOI: https://doi.org/10.12141/j.issn.1000-565X.240102

Materials Science & Technology

Study on Internal Stress of Asphalt Mixture Under Three-Point Bending Mode

  • WANG Wei ,
  • TAN Yiqiu ,
  • XU Yongjiang
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  • 1.School of Transportation Science and Engineering，Harbin Institute of Technology，Harbin 150090，Heilongjiang，China
    2.State Key Laboratory of Urban Water Resource and Environment，Harbin Institute of Technology，Harbin 150090，Heilongjiang，China

Received date: 2024-03-07

  Online published: 2024-06-06

Supported by

the Joint Fund of the National Natural Science Foundation and Heilongjiang Province(U20A20315)

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Abstract

The bending and tensile properties of asphalt mixture affect the service quality and life of asphalt pavement, and its internal stress determines the bending and tensile performance. In order to investigate the internal stress characteristics of asphalt mixtures, this paper adopted the discrete element method to quantitatively evaluate the force chains of each component in asphalt mixtures under the three-point bending mode. Firstly, it constructed a template library of coarse aggregates based on image recognition and realized efficient three-dimensional modeling of asphalt mixture specimen and proposed a three-point bending simulation method. Then the internal force chain distribution of asphalt mixture was visually represented, and data of force chains of each component were extracted. The force chain characteristics were analyzed from the three aspects of composition, strength, and angle. The results show that under the three-point bending mode, the internal force chain field of asphalt mixture exhibits tension and compression zones, and the extrusion of aggregates only takes effect in the compressed zone. 70.8% of the internal contact force of SMA 13 asphalt mixture is provided by the asphalt mortar, and that of AC13 asphalt mixture is 83.2%, indicating that coarse aggregates have little effect under bending and tensile stress and asphalt mortar plays a major role in resisting external loads. The proportion of force chains decrease as the strength increased, and the proportion of strong force chains in the interior of the mortar and the mortar-aggregate interface position is basically the same. The stress between coarse aggregates is uneven, and the mortar plays a significant role in ensuring uniform stress within the asphalt mixture. The strength of horizontal force chains at the aggregate-mortar interface is slightly higher than that in the vertical direction, and the strength of aggregate force chains fluctuates greatly with the change of angle. Asphalt mortar bears the main load during bending and tensile force of asphalt mixture and the research findings can serve as a reference for the structural design and performance evaluation of asphalt mixtures.

Key words： road engineering; asphalt mixture; three-point bendin; discrete element method; characteristics of force chain

Cite this article

WANG Wei , TAN Yiqiu , XU Yongjiang . Study on Internal Stress of Asphalt Mixture Under Three-Point Bending Mode[J]. Journal of South China University of Technology(Natural Science), 2024 , 52(10) : 101 -111 . DOI: 10.12141/j.issn.1000-565X.240102

References

1 MA T， ZHANG D， ZHANG Y，et al ．Micromechanical response of aggregate skeleton within asphalt mixture based on virtual simulation of wheel tracking test［J］．Construction and Building Materials，2016，111：153-163.
2 GONG F Y， DENG R， WANG Q H，et al ．A review on the simulation of aggregate morphologies in mixture performances based on discrete element method［J］．Construction and Building Materials，2023，385：131522/1-11.
3 唐成，王端宜，贠迪，等 ．沥青混合料骨架细观接触的高通量计算［J］．华南理工大学学报（自然科学版），2023，51（4）：135-144.
  TANG Cheng， WANG Duanyi， YUN Di，et al ．High-throughput calculation for meso-contact of asphalt mixture skeleton［J］．Journal of South China University of Technology （Natural Science Edition），2023，51（4）：135-144.
4 MA T， ZHANG D， ZHANG Y，et al ．Simulation of wheel tracking test for asphalt mixture using discrete element modelling［J］．Road Materials and Pavement Design，2018，19（2）：367-384.
5 张东，何亮，侯曙光，等 ．沥青混合料断裂数值模拟进展［J］．公路交通科技，2017，34（12）：1-8，22．
  ZHANG Dong， HE Liang， HOU Shu-guang，et al ．Advance in Numerical simulation of asphalt mixture fracture［J］．Journal of Highway and Transportation Research and Development，2017，34（12）：1-8，22.
6 YAO H， XU M， LIU J，et al ．Literature review on the discrete element method in asphalt mixtures［J］．Frontiers in Materials，2022，9（4）：879245/1-19.
7 FENG H， PETTINARI M， HOFKO B，et al ．Study of the internal mechanical response of an asphalt mixture by 3-D discrete element modeling［J］．Construction and Building Materials，2015，77：187-196.
8 MA T， ZHANG Y， ZHANG D，et al ．Influences by air voids on fatigue life of asphalt mixture based on discrete element method［J］．Construction and Building Materials，2016，126：785-799.
9 DING X， MA T， ZHANG W，et al ．Effects by property homogeneity of aggregate skeleton on creep performance of asphalt concrete［J］．Construction and Building Materials，2018，171：205-213.
10 薛斌 ．沥青混合料细观力学特性与演化行为研究［D］．西安：长安大学，2020.
11 郑得标，倪富健，蒋继望，等 ．基于离散元法的沥青混合料复合断裂行为研究［J］．江苏大学学报（自然科学版），2020，41（1）：87-92.
  ZHENG Debiao， NI Fujian， JIANG Jiwang，et al ．Mixed-mode fracture behavior of asphalt mixture based on discrete element method［J］．Journal of Jiangsu University （Natural Science Edition），2020，41（1）：87-92.
12 彭勇，杨汉铎，陆学元，等 ．基于离散元法的空隙特征对沥青混合料虚拟剪切疲劳寿命的影响［J］．吉林大学学报（工学版），2021，51（3）：956-964．
  PENG Yong， YANG Han-duo， LU Xue-yuan，et al ．Effect of void characteristics on virtual shear fatigue life of asphalt mixtures using discrete element method［J］．Journal of Jilin University （Engineering and Technology Edition），2021，51（3）：956-964.
13 石立万，王端宜，徐驰，等 ．基于离散元法的沥青混合料骨架细观性能研究［J］．华南理工大学学报（自然科学版），2015，43（10）：50-56.
  SHI Li-wan， WANG Duan-yi， XU Chi，et al ． Investigation into meso performance of asphalt mixture skeleton based on discrete element method［J］．Journal of South China University of Technology （Natural Science Edition），2015，43（10）：50-56.
14 常明丰，刘志玲，张久鹏，等 ．基于间接拉伸模式的沥青混合料内部力链分布特征［J］．中国公路学报，2022，35（9）：224-234.
  CHANG Ming-feng， LIU Zhi-ling， ZHANG Jiu-peng，et al ．Distribution characteristics of force chains in asphalt mixtures based on indirect tensile pattern［J］．China Journal of Highway and Transport，2022，35（9）：224-234.
15 YAO H， LIU Y， YOU Z，et al ．Discrete element simulation of bending beam rheometer test for nanomaterials modified asphalt［J］．International Journal of Pavement and Research Technology，2012，5（3）：161-168.
16 王彦喆 ．粗集料细观结构特征对沥青混合料性能的影响研究［D］．西安：长安大学，2012.
17 陈俊，张东，黄晓明 ．离散元颗粒流软件（PFC）在道路工程中的应用［M］．北京：人民交通出版社，2015.
18 谢定义，林本海，邵生俊 ．岩土工程学［M］．北京：高等教育出版社，2008.
19 沈观林，胡更开 ．复合材料力学［M］．北京：清华大学出版社，2006.
20 张德育 ．基于离散元方法的沥青混合料虚拟永久变形试验研究［D］．南京：东南大学，2013.
21 唐俊玮 ．基于离散元的沥青混合料高温性能研究［D］．南京：东南大学，2015.
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