[1]王晓帅,王子寒,景晓昆,等.粗粒土大型直剪试验宏细观研究与离散元模拟[J].深圳大学学报理工版,2020,37(3):279-286.[doi:10.3724/SP.J.1249.2020.03279]
 WANG Xiaoshuai,WANG Zihan,JING Xiaokun,et al.A macro-micro study and distinct element simulation on large-scale shear test of coarse-grained soil[J].Journal of Shenzhen University Science and Engineering,2020,37(3):279-286.[doi:10.3724/SP.J.1249.2020.03279]
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粗粒土大型直剪试验宏细观研究与离散元模拟()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第37卷
期数:
2020年第3期
页码:
279-286
栏目:
土木建筑工程
出版日期:
2020-05-20

文章信息/Info

Title:
A macro-micro study and distinct element simulation on large-scale shear test of coarse-grained soil
文章编号:
202003010
作者:
王晓帅王子寒景晓昆肖成志
河北工业大学土木与交通学院,天津 300401
Author(s):
WANG Xiaoshuai WANG Zihan JING Xiaokun and XIAO Chengzhi
School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, P.R.China
关键词:
土力学直剪试验剪切带离散元粗粒土 可视化
Keywords:
soil mechanics direct shear test shear zone distinct element method coarse-grained soil visualization
分类号:
TU43
DOI:
10.3724/SP.J.1249.2020.03279
文献标志码:
A
摘要:
为研究粗粒土剪切试验过程中宏观力学特性与颗粒细观运动规律,采用可视化大直剪仪对不同级配粗粒土进行剪切试验,利用图像处理技术对宏细观参数变化规律进行分析,再通过离散元数值模拟研究试样内部颗粒运动规律. 研究发现,剪应力-累计应变关系曲线属于剪切硬化型,颗粒在剪切过程中的破碎形态以接触点侵蚀破碎为主;对颗粒长轴定向、平面孔隙率和配位数的分析发现,剪切过程中颗粒发生翻滚重排以及细粒填充作用;直剪试验图像分析及离散元数值模拟均发现,剪切带不是严格按照水平主剪切面发展,而是与向上突起的弧形副剪切面共同形成拱形剪切带.
Abstract:
In order to study the macro mechanical properties and particle micro motion law in the shear test of coarse-grained soil, we carry out the shear test of different gradations of coarse-grained soil by using the visualized large direct shear apparatus, and analyze the change law of macro and micro parameters by using the image processing technology, and then investigate the particle motion law in the sample by numerical simulation using the discrete element method (DEM). The results show that the relationship curve between shear stress and cumulative strain in shear tests of coarse-grained soil belongs to the type of shear hardening. The failure mode of particles during shearing process is mainly caused by erosion fracture of contact points. The analysis of rose diagrams, plane porosities and coordination number of particles shows that the particle rollover, rearrangement and fine grained filling occurre during the shearing process. The image analyses of tests and the numerical simulation results of DEM show that shear zone in large shear tests is between horizontal main sliding surface and auxiliary surface of protuberant arc.

参考文献/References:

[1] 陈镠芬,高庄平,朱俊高,等.粗粒土级配及颗粒破碎分形特性[J].中南大学学报自然科学版,2015,46(9):3446-3453.
CHEN Liufen, GAO Zhuangping, ZHU Jungao, et al. Gradation of coarse grained soil and fractal geometry character of particle breakage[J]. Journal of Central South University Science and Technology, 2015, 46(9): 3446-3453.(in Chinese)
[2] 汪丁建,唐辉明,张雅慧,等.粗粒土试验与力学特性研究现状[J].冰川冻土,2016,38(4):943-954.
WANG Dingjian, TANG Huiming, ZHANG Yahui, et al. Research progress on mechanical tests and properties of coarse-grained soil[J]. Journal of Glaclology and Geocryology, 2016, 38(4): 943-954.(in Chinese)
[3] 褚福永,朱俊高,殷建华.基于大三轴试验的粗粒土剪胀性研究[J].岩土力学,2013,34(8):2249-2254.
CHU Fuyong, ZHU Jungao, YIN jianhua. Study of dilatancy behaviors of coarse-grained soils in large-scale triaxial test[J]. Rock and Soil Mechanics, 2013, 34(8): 2249-2254.(in Chinese)
[4] 徐肖峰,魏厚振,孟庆山,等.直剪剪切速率对粗粒土强度与变形特性的影响[J].岩土工程学报,2013,35(4):728-733.
XU Xiaofeng, WEI Houzhen, MENG Qingshan, et al. Effects of shear rate on shear strength and deformation characteristics of coarse-grained soils in large-scale direct shear tests[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(4): 728-733.(in Chinese)
[5] FU W X, ZHENG X, LEI X Z, et al. Using a modified direct shear apparatus to explore gap and size effects on shear resistance of coarse-grained soil[J]. Particuology, 2015, 23: 82-89.
[6] BONFILS B, BALLANTYNE G R, POWELL M S. Developments in incremental rock breakage testing methodologies and modelling[J]. International Journal of Mineral Processing, 2016, 152: 16-25.
[7] 郭万里,朱俊高,钱彬,等.粗粒土的颗粒破碎演化模型及其试验验证[J].岩土力学,2019,40(3):1023-1029.
GUO Wanli, ZHU Jungao, QIAN Bin, et al. Particle breakage evolution model of coarse-grained soil and its experimental verification[J]. Rock and Soil Mechanics, 2019, 40(3): 1023-1029.(in Chinese)
[8] 徐永福.考虑颗粒破碎影响的粗粒土的剪切强度理论[J].岩土工程学报,2018,40(7):1171-1179.
XU Yongfu. Theory of shear strength of granular materials based on particle breakage[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(7): 1171-1179.(in Chinese)
[9] 徐永福.基于颗粒破碎的粗粒土剪切强度的模拟分析[J].工程地质学报,2018,26(6):1409-1414.
XU Yongfu. PFC2D simulation of rockfill shear strength based on particle fragmentation[J]. Journal of Engineering Geology, 2018, 26(6): 1409-1414.(in Chinese)
[10] TEJCHMAN J, GORSKI J, EINAV I. Effect of grain crushing on shear localization in granular bodies during plane strain compression[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 2012, 36(18): 1909-1931.
[11] WEI K. Study on collapse behaviors of coarse grained soils[J]. Periodica Polytechnica: Civil Engineering, 2012, 56(2): 245-252.
[12] 潘家军,程展林,余挺,等.不同中主应力条件下粗粒土应力变形特性试验研究[J].岩土工程学报,2016,38(11):2078-2084.
PAN Jiajun, CHENG Zhanlin, YU Ting, et al. Experimental study on stress-strain characteristics of coarse-grained soil under different intermediate principal stresses[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(11): 2078-2084.(in Chinese)
[13] 徐晗,程展林,泰培,等.粗粒土的离心模型试验与数值模拟[J]. 岩土力学,2015,36(5):1322-1327.
XU Han, CHENG Zhanlin, TAI Pei, et al. Centrifuge model test and numerical simulation of coarse-grained soil[J]. Rock and Soil Mechanics, 2015, 36(5): 1322-1327.(in Chinese)
[14] 周健,余荣传,贾敏才.基于数字图像技术的砂土模型试验细观结构参数测量[J].岩土工程学报,2006,28(12):2047-2052.
ZHOU Jian, YU Rongchuan, JIA Mincai. Measurement of microstructure parameters for granular soil model using digital image technology[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(12): 2047-2052.(in Chinese)
[15] 刘建坤,于钱米,刘景宇,等.细粒土不均匀分布对粗粒土力学特性的影响[J].岩土工程学报,2017,39(3):562-572.
LIU Jiankun, YU Qianmi, LIU Jingyu, et al. Influence of non-uniform distribution of fine soil on mechanical properties of coarse-grained soil[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(3): 562-572.(in Chinese)
[16] 凌华,傅华,韩华强.粗粒土强度和变形的级配影响试验研究[J].岩土工程学报,2017,39(增1):12-16.
LING Hua, FU Hua, HAN Huaqiang. Experimental study on effects of gradation on strength and deformation of coarse-grained soil[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(Supply1): 12-16.(in Chinese)
[17] 王子寒.粗粒土接触力学特性及细观本构关系研究[D].上海:同济大学,2013.
WANG Zihan. A study on contact behaviors and microscopic constitutive relations of coarse-grained soils[D]. Shanghai: Tongji University, 2013.(in Chinese)

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备注/Memo

备注/Memo:
Received:2019-07-18;Accepted:2019-12-22
Foundation:National Natural Science Foundation of China (51808184); Natural Science Foundation of Hebei Province (E2016202057)
Corresponding author:Associate professor WANG Zihan.E-mail:wangzihan@hebut.edu.cn
Citation:WANG Xiaoshuai,WANG Zihan,JING Xiaokun,et al.A macro-micro study and distinct element simulation on large-scale shear test of coarse-grained soil[J]. Journal of Shenzhen University Science and Engineering, 2020, 37(3): 279-286.(in Chinese)
基金项目:国家自然科学基金资助项目 (51808184);河北省自然科学基金资助项目(E2016202057)
作者简介:王晓帅(1994—),河北工业大学硕士研究生,研究方向:细观土力学.E-mail: 1300280490@qq.com
引文:王晓帅,王子寒,景晓昆,等. 粗粒土大型直剪试验宏细观研究与离散元模拟[J]. 深圳大学学报理工版,2020,37(3):279-286.
更新日期/Last Update: 2020-05-30