[1] Cao Qingqing, Liu Xiuyu, Wang Hao, Huang Xiaoming, et al. Simulation and analysis of two-point bending fatigue testof asphalt concrete based on discrete element model [J]. Journal of Southeast University (English Edition), 2017, 33 (3): 286-292. [doi:10.3969/j.issn.1003-7985.2017.03.006]

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Simulation and analysis of two-point bending fatigue testof asphalt concrete based on discrete element model()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

33

Issue:

2017 3

Page:

286-292

Research Field:

Traffic and Transportation Engineering

Publishing date:

2017-09-30

Info

Title:

Simulation and analysis of two-point bending fatigue testof asphalt concrete based on discrete element model

Author(s):

Cao Qingqing¹;  Liu Xiuyu¹;  Wang Hao²;  Huang Xiaoming¹

¹School of Transportation, Southeast University, Nanjing 210096, China
²Department of Civil and Environmental Engineering, Rutgers, State University of New Jersey, Piscataway, NJ 08854, USA

Keywords:

high modulus asphalt concrete;  numerical simulation;  Burger’s parameters;  fatigue life

PACS:

U416.2

DOI:

10.3969/j.issn.1003-7985.2017.03.006

Abstract:

In order to investigate the fatigue performance of French high modulus asphalt concrete and the correlation between Burger’s parameters and fatigue life, the virtual model of asphalt mixture trapezoidal specimen in the two-point bending fatigue test was constructed in discrement element software PFC3D. The initial stiffness and the maximum stress when the specimen reached fatigue were calculated. Through the comparison between virtual and single field fatigue test curves, the credibility of simulation in DEM was verified. Then, the impacts of top controlled displacement and Burger’s parameters(E₁, E₂, η₁, η₂)on the fatigue life of the specimen were explored. The simulation results indicate that the maximum stress increases with the increase in the top controlled displacement. With the increase of E₁ and the decrease of E₂ in Burger’s model, the modulus of the asphalt binder increases, and the fatigue performance of the asphalt mixture enhances. η₁ and η₂ have limited influence on fatigue life compared with E₁ and E₂.

References:

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Memo

Memo:

Biographies: Cao Qingqing(1993—), female, graduate; Huang Xiaoming(corresponding author), male, doctor, professor, huangxm@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No. 51378121).
Citation: Cao Qingqing, Liu Xiuyu, Wang Hao, et al. Simulation and analysis of two-point bending fatigue test of asphalt concrete based on discrete element model[J].Journal of Southeast University(English Edition), 2017, 33(3):286-292.DOI:10.3969/j.issn.1003-7985.2017.03.006.

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