JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2015, Vol. 45 ›› Issue (4): 50-56.doi: 10.6040/j.issn.1672-3961.0.2014.183

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Calibration of micro-parameters of parallel bonded model for rocks

JIANG Mingjing1,2,3, FANG Wei1, SIMA Jun1   

  1. 1. School of Civil Engineering, Wuhan University, Wuhan 430072, Hubei, China;
    2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;
    3. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
  • Received:2014-07-07 Revised:2015-06-10 Online:2015-08-20 Published:2014-07-07

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Abstract: The micro-parameters of parallel bond model could not satisfy the compressive strength and tensile strength simultaneously, this was a problem in the simulation of rocks. A set of uniaxial tension tests and uniaxial compression tests of rocks were simulated to investigate this problem. First, DEM specimens with different porosity ratio and different nonuniform coefficient were calibrated according to the laboratory test results of Lac du Bonnet granite. Second, the deficiency of the parallel bond model was pointed out and the improved methods were proposed from the perspective of microscopic failure mechanism. The simulation results showed that the microscopic parameters satisfied tension strength was one order of magnitude deviated from the microscopic parameters, which could also satisfy compression strength. Tensile characteristics and shear characteristics were considered in the parallel bond model, while the influence of normal stress on the bond was ignored. This was the reason that the tension-compression strength ratio of rock was different from the experimental result. It was advised to use clumped particle model which could simulate particle breakage or cementation model based on laboratory tests.

Key words: parallel bonded model, uniaxial compression, macro-properties, uniaxial tension, discrete element method, microparameters

CLC Number: 

  • TU45
[1] CUNDALL P A. A computer model for simulating progressive large scale movements in blocky rock systems[C]//Proceedings of Symposium of International Rock Mechanics. Nancy, France: [s.n.], 1971:11-18.
[2] CUNDALL P A. The measurement and analysis of acceleration in rock slopes[D]. London, England:Imperial College of Science and Technology, 1971.
[3] CUNDALL P A, STRACK O D L. A discrete numerical model for granular assembles[J]. Geotechnique, 1979, 29(1):47-65.
[4] 王泳嘉, 邢纪波. 离散元法及其在岩石力学中的应用[M].沈阳: 东北工业学院出版社, 1991:5-12.
[5] 钊万禧. 离散单元法的基本原理及其在岩体工程中的应用[J]. 岩石力学与工程学报, 1986, 5(2):165-172. ZHAO Wanxi. Principle of discrete element method and its application to rock mechanics and engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 1986, 5(2): 165-172.
[6] 柴贺军, 孟云伟, 贾学明. 柔性石笼挡土墙压力的PFC2D数值模拟[J]. 公路交通科技, 2007, 24(5):48-52. CHAI Hejun, MENG Yunwei, JIA Xueming. PFC2D numerical simulation on earth stress of flexible gabion retaining wall[J]. Journal of Highway and Transportation Research and Development, 2007, 24(5):48-52.
[7] 郭爱民, 卢世宗. 矿山边坡破坏机制的离散单元法模拟[J]. 东北工学院学报, 1992, 13(1):25-32. GUO Aimin, LU Shizong. Simulation of the failure mechanism of mining slope by diserete element method[J]. Jouurnal of Northeast University of technology, 1992, 13(1):25-32.
[8] ESAKI T, JIANG Y, BHATTARAI T N, et al. Stability analysis and reinforcement system design in a progressively failed steep rock stope by the disctinct element method[J]. International Journal of Rock Mechanics and Mining Sciences, 1998, 35(4-5): 664-666.
[9] AN G F, YIN K L, TANG H M. Discrete element analysis of Huangtupo landslide[J]. Journal of China University of Geosciences, 2002, 13(1):83-85.
[10] 徐士良, 朱合华. 公路隧道通风竖井岩爆机制颗粒流模拟研究[J]. 岩土力学, 2011, 32(3):885-889. XU Shiliang, ZHU Hehua. Particle flow simulation of rock burst mechanism for highway tunnel ventilation shaft [J]. Rock and Soil Mechanics, 2011, 32(3):885-889.
[11] 刘顺桂, 刘海宁. 断续节理直剪试验与PFC2D数值模拟分析[J]. 岩石力学与工程学报, 2008, 27(9):1828-1836. LIU Shungui, LIU Haining. Direct shear tests and PFC2D numerical simulation of intermittent joints[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(9):1828-1836.
[12] YANG B D, JIAO Y, LEI S T. A study on the effects of microparameters on macroproperties for specimens created by bonded particles[J]. Engineering Computations, 2006, 23(6):607-631.
[13] NARDINA, SCHREFLER B A. Modelling of cutting tool soil interaction part II: macromechanical model and upscaling[J]. Computer Mechanics, 2005, 36(5):343-359.
[14] 王嘉骏, 张宏超. 基于离散单元法的沥青马蹄脂模型细观参数确定[J]. 公路工程, 2011, 36(5):140-143. WANG Jiajun, ZHANG Hongchao. Determination to model microscale parameters of asphalt mastic[J]. Highway Engineering, 2011, 36(5):140-143.
[15] HUANG H Y. Discrete element modeling of tool rock interaction[D]. Minnesota, America: University of Minnesota, 1999.
[16] POTYONDY D O, CUNDALL P A. A bonded-particle model for rock[J]. International Journal of Rock Mechanics and Mining Sciences, 2004, 41:1329-1364.
[17] 徐金明, 谢芝蕾, 贾海涛. 石灰岩细观力学特性的颗粒流模拟[J]. 岩土力学, 2010, 31(增刊2): 390-395. XU Jinming, XIE Zhilei, JIA Haitao. Simulation of mesomechanical properties of limestone using particle flow code[J]. Rock and Soil Mechanics, 2010, 31(supp.2):390-395.
[18] 赵国彦, 戴兵, 马驰. 平行黏结模型中细观参数对宏观特性影响研究[J]. 岩石力学与工程学报, 2012, 31(7):1491-1498. ZHAO Guoyan, DAI Bing, MA Chi. Study of effects of microparameters on macroproperties for parallel bonded model[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(7):1491-1498.
[19] CHO N, MARTIN C D, SEGO D C. A clumped particle model for rock[J]. International Journal of Rock Mechanics and Mining Sciences, 2007, 44:997-1010.
[20] 窦庆峰, 岳顺, 代高飞. 岩石直接拉伸试验与劈裂试验的对比研究[J]. 地下空间, 2004, 24(2):179-203. DOU Qingfeng, YUE Shun, DAI Gaofei. Comparative study of direct tensile test for rocks and split test[J]. Underground Space, 2004, 24(2):179-203.
[21] LIM S S, MARTIN C D. Core disking and its relationship with stress magnitude for Lac du Bonnet granite[J]. International Journal of Rock Mechanics and Mining Sciences, 2010, 47(2):254-264.
[22] MARTIN C D. The strength of massive Lac du Bonnet granite around underground openings[D]. Winnipeg, Canada: University of Manitoba, 1993.
[23] JIANG M J, KONRAD J M, LEROUEIL S. An efficient technique for generating homogeneous specimens for DEM studies[J]. Computers and Geotechnics, 2003, Vol.30(7):579-597.
[24] 尹成薇. 岩体裂纹扩展机制的数值模拟研究[D]. 阜新: 辽宁工程技术大学, 2012. YI Chengwei. Numerical simulation of cracks expansion mechanism of rock[D]. Fuxin: Liaoning Technical University, 2012.
[25] 王刚, 袁康, 蒋宇静, 等. 基于颗粒离散元法的锚固节理剪切行为宏细观研究[J]. 煤炭学报, 2014, 39(12):2381-2389. WANG Gang, YUAN Kang, JIANG Yujing, et al. Macro-micro mechanical study on bolted joint subjected to shear loading based on DEM[J]. Journal of China Coal Society, 2014, 39(12):2381-2389.
[26] JIANG M J, SUN Y G, LI L Q, et al. Contact behavior of idealized granules bonded in different interparticle distances: an experimental investigation[J]. Mechanics and Materials, 2012, 55(1):1-15.
[27] JIANG M J, SUN Y G, XIAO Y. An experimental investigation on the contact behavior between cemented granules[J]. Geotechnical and Testing Joumal, 2012, 35(5):678-690.
[28] 蒋明镜, 陈贺, 刘芳. 岩石微观胶结模型及离散元 数值仿真方法初探[J]. 岩石力学与工程学报, 2013, 32(1):15-23. JIANG Mingjing, CHEN He, LIU Fang. A Microscopic bond model for rock and preliminary study of numerical simulation method by distinct element method[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(1):15-23.
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