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单压下节理密度及倾角对类岩石试件强度及变形的影响

王佩新 曹平 蒲成志 范祥 陈瑜 王聪聪

王佩新, 曹平, 蒲成志, 范祥, 陈瑜, 王聪聪. 单压下节理密度及倾角对类岩石试件强度及变形的影响[J]. 工程科学学报, 2017, 39(4): 494-501. doi: 10.13374/j.issn2095-9389.2017.04.003
引用本文: 王佩新, 曹平, 蒲成志, 范祥, 陈瑜, 王聪聪. 单压下节理密度及倾角对类岩石试件强度及变形的影响[J]. 工程科学学报, 2017, 39(4): 494-501. doi: 10.13374/j.issn2095-9389.2017.04.003
WANG Pei-xin, CAO Ping, PU Cheng-zhi, FAN Xiang, CHEN Yu, WANG Cong-cong. Effect of the density and inclination of joints on the strength and deformation properties of rock-like specimens under uniaxial compression[J]. Chinese Journal of Engineering, 2017, 39(4): 494-501. doi: 10.13374/j.issn2095-9389.2017.04.003
Citation: WANG Pei-xin, CAO Ping, PU Cheng-zhi, FAN Xiang, CHEN Yu, WANG Cong-cong. Effect of the density and inclination of joints on the strength and deformation properties of rock-like specimens under uniaxial compression[J]. Chinese Journal of Engineering, 2017, 39(4): 494-501. doi: 10.13374/j.issn2095-9389.2017.04.003

单压下节理密度及倾角对类岩石试件强度及变形的影响

doi: 10.13374/j.issn2095-9389.2017.04.003
基金项目: 

国家自然科学基金资助项目(10972238)

中南大学硕士生自主探索创新项目(2016zzts448)

详细信息
  • 中图分类号: TU452

Effect of the density and inclination of joints on the strength and deformation properties of rock-like specimens under uniaxial compression

  • 摘要: 通过预制张开节理类岩石试件,在单轴压缩条件下,研究节理密度及倾角的组合作用对试件强度和变形特征的影响.试验结果表明:(1)随着节理倾角的增大,应力-应变曲线由多峰值转变为单峰值,试件脆性增强,延性减弱;(2)节理密度对当量峰值强度的影响与节理倾角大小有关,对当量弹模的影响呈“V”形变化,即当量弹模随着节理密度的增大呈现先减小后增大的变化规律;(3)当量弹模随节理倾角的增大而增大,在节理倾角为90°的时候达到最大值,为完整试件弹性模量的70%~80%;(4)节理倾角对多节理类岩石试件当量峰值强度和当量弹性模量的影响大于节理密度的影响.对试验结果进一步分析发现:节理密度及节理倾角与应力-应变曲线、当量峰值强度及当量弹性模量之间的关系,其变化规律与试件的破坏过程息息相关,其破坏模式可分为张拉破坏、剪切破坏和复合破坏.
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出版历程
  • 收稿日期:  2016-07-04

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