考虑结构面损伤的岩石本构模型与工程应用
DOI:
作者:
作者单位:

1.聊城大学建筑工程学院;2.山东科技大学矿业与安全工程学院;3.山东科技大学土木工程与建筑学院

作者简介:

通讯作者:

中图分类号:

TU9

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Stability Anaysis for Shallow Cross Tunnel Based on Damage of Structural Plane of Rock
Author:
Affiliation:

Liaocheng Univercity

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    含结构面的岩体在应力加载-卸载作用下破坏机理非常复杂,建立含结构面岩体的损伤本构模型是研究的难点。通过对含结构面的岩体建立三维数值模型,研究分析岩体在三轴压缩下的破坏特征,发现含结构面岩体的峰值随着围岩的增加而升高,在单轴压缩下,岩体的峰后强度几乎为零;且含结构的面岩体存在损伤阀值点,得出了岩体损伤劣化行为发生的原因。根据微元统计理论建立了损伤变量与岩体劣化破坏之间的概率密度关系,通过引入修正系数η调整了岩体因含有结构面的初始损伤,并拟合出围压与峰前弹性模量的非线性关系,推导出含结构面岩体的损伤本构方程。与已有损伤本构方程进行数据对比,发现本方程可更加准确描述结构面的损伤演化特征,通过FISH语言实现对FLAC3D的二次开发,将本构方程程序化,并以此研究分析了青岛某交叉隧道施工中的沉降问题,发现采用损伤本构模型计算结果与现场实测数据吻合程度较高,反映出损伤本构模型能较好的描述风化花岗岩的损伤劣化效应。建立的含结构面岩体的损伤本构方程对实际施工及理论研究具有重要的参考价值。

    Abstract:

    The failure mechanism of rock contains structural plane is very complicated during the loading and unloading of stress and the damage constitutive relation of of rock contains structural plane is a problem.Discovered the law that the peak value of rock contains structural plane is higher following the growth confining pressure and the latter peak strength is almost zero via establish 3D numerical model and load stress on the model.Conclud the rock contains structural plane has a threshold value of damage and the basic reason of damage.Established the probability density relationship via the damage variable and rock damage based on micro element statistical theory and calculate the nonlinear relationship between theconfining pressure and elastic modulus before the peak.Derivated the constitutive equation via the correction coefficient η which can adjust the initial damage of rock.Compared the constitutive equation and the existing constitutive equation,found that our constitutive equation is more reasonabel.Changed the FLAC 3D via secondary development through fish language,implementated the new equation.Analysised the settlement of cross tunnel of Qingdao subway,found that the new equation is near to the field test and it can describe the damage of roch well.The equation is important for the engineering construction and theoretical research.

    参考文献
    相似文献
    引证文献
引用本文

田忠喜,赵增辉,代春泉. 考虑结构面损伤的岩石本构模型与工程应用[J]. 科学技术与工程, 2019, 19(22): 305-311.
tianzhongxi, and. Stability Anaysis for Shallow Cross Tunnel Based on Damage of Structural Plane of Rock[J]. Science Technology and Engineering,2019,19(22):305-311.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-02-19
  • 最后修改日期:2019-03-22
  • 录用日期:2019-04-19
  • 在线发布日期: 2019-08-28
  • 出版日期:
×
律回春渐,新元肇启|《科学技术与工程》编辑部恭祝新岁!
亟待确认版面费归属稿件,敬请作者关注