• 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引(EI)收录期刊
  • Scopus数据库收录期刊

中高应变率下花岗岩动力特性三轴试验研究

卢志堂, 王志亮

卢志堂, 王志亮. 中高应变率下花岗岩动力特性三轴试验研究[J]. 岩土工程学报, 2016, 38(6): 1087-1094. DOI: 10.11779/CJGE201606016
引用本文: 卢志堂, 王志亮. 中高应变率下花岗岩动力特性三轴试验研究[J]. 岩土工程学报, 2016, 38(6): 1087-1094. DOI: 10.11779/CJGE201606016
LU Zhi-tang, WANG Zhi-liang. Triaxial tests on dynamic properties of granite under intermediate and high strain rates[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(6): 1087-1094. DOI: 10.11779/CJGE201606016
Citation: LU Zhi-tang, WANG Zhi-liang. Triaxial tests on dynamic properties of granite under intermediate and high strain rates[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(6): 1087-1094. DOI: 10.11779/CJGE201606016

中高应变率下花岗岩动力特性三轴试验研究  English Version

基金项目: 国家自然科学基金项目(51379147,51579062,51174145); 教育部博士点专项资金项目(20120072110024)
详细信息
    作者简介:

    卢志堂(1985- ),男,博士研究生,主要从事岩土动力学方面研究;E-mail: zhitang_lu@163.com。

Triaxial tests on dynamic properties of granite under intermediate and high strain rates

  • 摘要: 利用改进的霍普金森压杆对不同围压、不同应变率下的岩样进行了试验研究,分析了其在中高应变率下的冲击响应特征与破坏模式。基于试验结果发现在围压一定情况下,岩石的动态抗压强度和峰值应变随应变率的增大而增大,其中抗压强度随应变率呈对数增长;弹性模量对围压和应变率不敏感,且应变率越大岩石破碎现象越严重。其次,在应变率相近情况下,花岗岩的动态抗压强度随围压呈增大趋势,其破坏模式由低围压下的轴向劈裂转向高围压下的压剪破坏;高围压下花岗岩应力-应变曲线出现屈服平台,具有明显的脆—延性转化特征。最后,检验了莫尔-库仑准则和霍克-布朗准则的适用性,指出此花岗岩更符合莫尔-库仑准则,其动态强度增大主要由黏聚力的应变率效应引起。
    Abstract: Experimental studies on the granite specimens under different confining pressures and strain rates are conducted using the improved split Hopkinson pressure bar (SHPB), and the impact response and failure mode of the rock subjected to intermediate and high strain rates are analyzed. Based on the test data, it is revealed that the dynamic compression strength and the peak strain of the granite increase with the increasing strain rate under the same confining pressure, and there is a logarithmic relationship between the dynamic strength and the strain rate. The elastic modulus of the granite is insensitive to the confining pressure and strain rate. The larger the strain rate is, the more serious the rock breakage is. Then, it is found that the compression strength of the granite increases with the increase of the confining pressure when the strain rate is identical. The failure mode of such granite takes on a change from the axial splitting at lower confining pressure to the compression/shear failure under high confining pressure. The stress-strain curve of the rock has a yield platform, being an apparent brittle-ductile transformation characteristic. Finally, the applicability of the famous Mohr-Coulomb criterion and the Hoek-Brown criterion to the biotite granite is further examined. It indicates that the granite can be well described by the Mohr-Coulomb criterion. The increase of dynamic strength of the granite is primarily due to the rate effect of cohesion.
  • [1] 何满潮, 钱七虎. 深部岩体力学研究进展[C]// 第九届全国岩石力学与工程学术大会论文集. 北京: 科学出版社, 2006: 49-62. (HE Man-chao, QIAN Qi-hu. Review of basic research on rock mechanics at great depth[C]// Proceedings of the 9 th Symposium on Rock Mechanics and Engineering. Beijing: Science Press, 2006: 49-62. (in Chinese))
    [2] 钱七虎, 李树忱. 深部岩体工程围岩分区破裂化现象研究综述[J].岩石力学与工程学报, 2008, 27(6): 1278-1284. (QIAN Qi-hu, LI Shu-chen. A review of research on zonal disintegration phenomenon in deep rock mass engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(6): 1278-1284. (in Chinese))
    [3] 黄理兴, 陈奕柏. 我国岩石动力学研究状况与发展[J]. 岩石力学与工程学报, 2003, 22(11): 1881-1886. (HUANG Li-xing, CHEN Yi-bai. Rock dynamics in China: past, present and future[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(11): 1881-1886. (in Chinese))
    [4] 李夕兵, 左宇军, 马春德. 中应变率下动静组合加载岩石的本构模型[J]. 岩石力学与工程学报, 2006, 25(5): 865-874. (LI Xi-bing, ZUO Yu-jun, MA Chun-de. Constitutive model of rock under coupled static-dynamic loading with intermediate strain rate[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(5): 865-874. (in Chinese))
    [5] 梁昌玉, 李 晓, 马超锋. 中等应变率加载条件下岩石的变形和力学特性研究进展及展望[J]. 工程地质学报, 2012, 20(1): 88-95. (LIANG Chang-yu, LI Xiao, MA Chao-feng. Progress and prospects of research on deformation and mechanical properties of rock at intermediate strain rates[J]. Journal of Engineering Geology, 2012, 20(1): 88-95. (in Chinese))
    [6] BRACE W F, MARTIN R J. A test of the law of effective stress for crystalline rocks of low porosity[J]. International Journal of Rock Mechanics and Mining Sciences, 1968, 5(5): 415-426.
    [7] 吴绵拔, 刘远惠. 中等应变速率对岩石力学特性的影响[J]. 岩土力学, 1980(1): 51-58. (WU Mian-ba, LIU Yuan-hui. The effect of intermediate strain rates on mechanical properties of rock[J]. Rock and Soil Mechanics, 1980(1): 51-58. (in Chinese))
    [8] 李海波, 赵 坚, 李俊如, 等. 三轴情况下花岗岩动态力学特性的试验研究[J]. 爆炸与冲击, 2004, 24(5): 470-474. (LI Hai-bo, ZHAO Jian, LI Jun-ru, et el. Triaxial compression tests of a granite[J]. Explosion and Shock Waves, 2004, 24(5): 470-474. (in Chinese))
    [9] 李夕兵, 古德生. 岩石冲击动力学[M]. 长沙: 中南工业大学出版社, 1994. (LI Xi-bing, GU De-sheng. Rock impact dynamics[M]. Changsha: Central South University of Technology Press, 1994. (in Chinese))
    [10] CHRISTENSEN R J, SWANSON S R, BROWN W S. Split-Hopkinson-bar tests on rock under confining pressure [J]. Experimental Mechanics, 1972, 12(11): 508-513.
    [11] 于亚伦. 用三轴 SHPB 装置研究岩石的动载特性 [J]. 岩土工程学报, 1992, 14(3): 76-79. (YU Ya-lun. The research of rock dynamic load properties by triaxial SHPB device[J]. Chinese Journal of Geotechnical Engineering, 1992, 14(3): 76-79. (in Chinese))
    [12] LI X B, ZHOU Z L, LOK T S, et al.Innovative testing technique of rock subjected to coupled static and dynamic loads[J].International Journal of Rock Mechanics and Mining Sciences, 2008, 45( 5) : 739-748.
    [13] 叶洲元, 李夕兵, 周子龙, 等. 三轴压缩岩石动静组合强度及变形特征的研究[J]. 岩土力学, 2009, 30(7): 1981-1986. (YE Zhou-yuan, LI Xi-bing, ZHOU Zi-long, et al. Static-dynamic coupling strength and deformation characteristics of rock under triaxial compression[J]. Rock and Soil Mechanics, 2009, 30(7): 1981-1986. (in Chinese))
    [14] 宫凤强, 李夕兵, 刘希灵. 三维动静组合加载下岩石力学特性试验初探[J]. 岩石力学与工程学报, 2011, 30(6): 1179-1190. (GONG Feng-qiang, LI Xi-bing, LIU Xi-ling. Preliminary experimental study of characteristics of rock subjected to 3D coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(6): 1179-1190. (in Chinese))
    [15] 宫凤强, 李夕兵, 刘希灵. 三轴SHPB加载下砂岩力学特性及破坏模式试验研究[J]. 振动与冲击, 2012, 31(8): 29-32. (GONG Feng-qiang, LI Xi-bing, LIU Xi-ling. Tests for sandstone mechanical properties and failure model under triaxial SHPB loading[J]. Journal of Vibration and Shock, 2012, 31(8): 29-32.(in Chinese) )
    [16] 金解放, 李夕兵, 钟海兵, 等. 三维静载与循环冲击组合作用下砂岩动态力学特性研究[J]. 岩石力学与工程学报, 2013, 32(7): 1358-1372. (JIN Jie-fang, LI Xi-bing, ZHONG Hai-bing, et al. Study of dynamic mechanical characteristic of sandstone subjected to three dimensional coupled static-cyclic impact loadings[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(7): 1358-1372. (in Chinese))
    [17] 许金余, 吕晓聪, 张 军, 等. 围压条件下岩石循环冲击损伤的能量特性研究[J]. 岩石力学与工程学报, 2010, 29(增刊2): 4159-4165. (XU Jin-yu, LÜ Xiao-cong, ZHANG Jun, et al. Research on energy properties of rock cyclical impact damage under confining pressure[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(S2): 4159-4165. (in Chinese))
    [18] 吕晓聪, 许金余, 赵德辉, 等. 冲击荷载循环作用下砂岩动态力学性能的围压效应研究[J]. 工程力学, 2011, 28(1): 138-144. (LÜ Xiao-cong, XU Jin-yu, ZHAO De-hui, et al. Research on confining pressure effect of sandstone dynamic mechanical performance under the cyclic impact loadings[J]. Engineering Mechanics, 2011, 28(1): 138-144. (in Chinese))
计量
  • 文章访问数:  591
  • HTML全文浏览量:  7
  • PDF下载量:  559
  • 被引次数: 0
出版历程
  • 收稿日期:  2015-05-31
  • 发布日期:  2016-06-24

目录

    /

    返回文章
    返回