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山东大学学报 (工学版) ›› 2015, Vol. 45 ›› Issue (5): 77-81.doi: 10.6040/j.issn.1672-3961.0.2015.072

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考虑剪切变形历史影响的节理峰值剪切强度准则

张建明,刘泉声,唐志成*,占婷,蒋亚龙   

  1. 武汉大学土木建筑工程学院, 湖北 武汉 430072
  • 发布日期:2020-05-26
  • 通讯作者: 唐志成(1983- ),男,湖南武冈人,博士研究生,主要研究方向为岩石节理的力学性质、裂纹扩展等方面的试验研究和教学工作.E-mail:tangzhichengok@126.com
  • 作者简介:张建明(1990- ),男,山东日照人,硕士研究生,主要研究方向为岩石节理力学特性及TBM破岩机理. E-mail:2013202100015@whu.edu.cn. *通信作者:唐志成(1983- ),男,湖南武冈人,博士研究生,主要研究方向为岩石节理的力学性质、裂纹扩展等方面的试验研究和教学工作. E-mail:tangzhichengok@126.com
  • 基金资助:
    国家重点基础研究发展计划(973)资助项目(2014CB046904);国家自然科学基金青年基金资助项目(41402247)

New peak shear strength criterion with inclusion of shear action history

ZHANG Jianming, LIU Quansheng, TANG Zhicheng*, ZHAN Ting, JIANG Yalong   

  1. School of Civil Engineering &
    Architecture, Wuhan University, Wuhan 430072, Hubei, China
  • Published:2020-05-26

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摘要： 采用人工模拟材料制备节理试件,分别在0.5、1.0、2.0、3.0 MPa法向应力下进行直剪试验,每级法向应力下剪切4次,模拟剪切变形历史对剪切强度的影响。试验结果表明:峰值强度随剪切次数的增加逐步减少,第1次直剪试验得到的峰值剪切强度与第2次直剪试验得到的峰值剪切强度差异最明显,之后随剪切次数的增加,峰值剪切强度变化较少。通过分析不同法向应力下节理的剪胀特征及峰值剪切强度的变化,建立了考虑剪切变形历史(以剪切次序表达)影响的峰值剪切强度准则。

关键词: 岩石节理, 剪切强度, 剪切历史

Abstract: Artificial joints were used for direct shear tests under four levels of normal stresses, i. e. 0.5,1.0, 2.0 and 3.0 MPa,to simulate the effect of shear deformation history. The results showed that peak strength decreased with the shear times increasing. In addition, the discrepancy between the result of direct shear test for the first time and for the second time was the most obvious. With shear times increasing, there were fewer changes of peak shear strength in following tests. Analyzing dilatancy characteristics and changes of peak shear strength under normal stresses, the peak shear strength criterion considering the effect of shear deformation history was established.

Key words: rock joint, peak shear strength, shear history

中图分类号: 

  • TU43
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