# [1]蒋应军,李思超,王天林.级配碎石动三轴试验的数值模拟方法[J].东南大学学报(自然科学版),2013,43(3):604-609.[doi:10.3969/j.issn.1001-0505.2013.03.029] 　Jiang Yingjun,Li Sichao,Wang Tianlin.Numerical method of dynamic triaxial test on graded crushed rock[J].Journal of Southeast University (Natural Science Edition),2013,43(3):604-609.[doi:10.3969/j.issn.1001-0505.2013.03.029] 点击复制 级配碎石动三轴试验的数值模拟方法() 分享到： var jiathis_config = { data_track_clickback: true };

43

2013年第3期

604-609

2013-05-20

## 文章信息/Info

Title:
Numerical method of dynamic triaxial test on graded crushed rock

1长安大学特殊地区公路工程教育部重点实验室, 西安710064; 2陕西省交通建设集团, 西安710075
Author(s):
1Key Laboratory for Special Area Highway Engineering of Ministry of Education, Changan University, Xian 710064, China
2Shanxi Provincial Communication Construction Group, Xian 710075, China

Keywords:

U414
DOI:
10.3969/j.issn.1001-0505.2013.03.029

Abstract:
In order to efficiently and deeply study the dynamic characteristics of graded crushed stone material, a numerical simulation method of dynamic triaxial test is developed. The numerical model of dynamic triaxial test of graded crushed rock is established based on PFC2D. The effects of test conditions and micro mechanical parameters on numerical simulation results are analyzed by numerical simulation, and the test condition and micro mechanical parameters calibration method are proposed. The results show that the size of the specimen has slight influence on the simulated value of axial strain when specimen height is greater than 40 cm and diameter is greater than 20 cm, so a specimen size of φ20 cm×40 cm is suggested. Combined with the effect of vehicle load on pavement, the action time and interval time of dynamic load are determined to be 0.2 and 1.8 s. Unstable deviatoric stress increases with the increase in confining pressure, and simulated axial strain decreases with the increase in normal stiffness, shear stiffness and friction coefficient. Numerical simulation results of the curves of axial strain vs. number of dynamic load action are consistent with laboratory results, which proves the reliability of the numerical simulation test.

## 参考文献/References:

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