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硬脆性岩石热-力-损伤本构模型及其初步运用

李天斌, 高美奔, 陈国庆, 马春驰, 许钟元, 阴红宇, 陈超, 孟陆波

李天斌, 高美奔, 陈国庆, 马春驰, 许钟元, 阴红宇, 陈超, 孟陆波. 硬脆性岩石热-力-损伤本构模型及其初步运用[J]. 岩土工程学报, 2017, 39(8): 1477-1484. DOI: 10.11779/CJGE201708015
引用本文: 李天斌, 高美奔, 陈国庆, 马春驰, 许钟元, 阴红宇, 陈超, 孟陆波. 硬脆性岩石热-力-损伤本构模型及其初步运用[J]. 岩土工程学报, 2017, 39(8): 1477-1484. DOI: 10.11779/CJGE201708015
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LI Tian-bin, GAO Mei-ben, CHEN Guo-qing, MA Chun-chi, XU Zhong-yuan, YIN Hong-yu, CHEN Chao, MENG Lu-bo. A thermal-mechanical-damage constitutive model for hard brittle rocks and its preliminary application[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(8): 1477-1484. DOI: 10.11779/CJGE201708015
Citation: LI Tian-bin, GAO Mei-ben, CHEN Guo-qing, MA Chun-chi, XU Zhong-yuan, YIN Hong-yu, CHEN Chao, MENG Lu-bo. A thermal-mechanical-damage constitutive model for hard brittle rocks and its preliminary application[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(8): 1477-1484. DOI: 10.11779/CJGE201708015
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硬脆性岩石热-力-损伤本构模型及其初步运用  English Version

  • 1. 成都理工大学环境与土木工程学院,四川 成都 610059;
    2. 地质灾害防治与地质环境保护国家重点实验室（成都理工大学）,四川 成都 610059;
    3. 四川省电力设计院,四川 成都 610072

基金项目: 国家自然科学基金项目（41230635,41172279）; 地质灾害防治与地质环境保护国家重点实验室课题（SKLGP2013Z004）
详细信息
    作者简介:

    李天斌(1964- ),男,教授,博士生导师,主要从事地下工程和斜坡地质灾害领域的研究工作。E-mail：ltb@cdut.edu.cn。

    通讯作者:

    高美奔，E-mail：578209337@qq.com

A thermal-mechanical-damage constitutive model for hard brittle rocks and its preliminary application

  • 1. College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China;
    2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), Chengdu 610059, China;
    3. Sichuan Electric Power Design Institute, Chengdu 610072, China

摘要

    摘要
  • 摘要: 热力作用下岩石本构行为的研究对深部资源开采、地热资源开发、深埋长大地下工程设施建设等岩石工程问题具有重要意义。基于现有岩石损伤劣化统计本构模型研究,引入三参量Weibull分布、热损伤、Drucker-Prager屈服准则和残余强度修正系数,经过严密的数学推导,建立了考虑岩石起裂应力的热-力-损伤本构模型,并确定了其参数表达式。采用围压25 MPa、不同温度（20℃,60℃,130℃）条件下黑云母花岗岩三轴压缩试验结果对模型进行了验证。结果表明：模型理论曲线和试验曲线具有较高的吻合度,能够客观地反映岩石热力破裂应力应变全过程和残余强度,且参数物理意义明确。最后,将本构模型嵌入FLAC数值分析软件,对瑞典APSE隧道开挖过程的热力响应进行了数值分析,计算结果较好地反映了隧道现场围岩的破坏规律。
    Abstract: The study of rock constitutive behavior under the thermal-mechanical action is of guiding significance in rock engineering such as exploitation of deep resources, exploitation of geothermal resources and construction of deep-buried long and large underground structures. Based on the recent researches of rock damage deteriorating constitutive model, through strict mathematical deduction, a thermal-mechanical-damage constitutive model considering crack initiation strength is established by introducing three parameters, Weibull distribution, thermal damage and Drucker-Prager yield criterion, and residual strength correction coefficient. The expressions for its parameters are determined. Then the constitutive model is verified by the results of biotite granite triaxial compression tests under confining pressure of 25 MPa and different temperatures of 20℃, 60℃ and 130℃. The results show that the theoretical curves match up to the experimental ones, which can objectively reflect the relationship between stress and strain, and the residential strength during the rock deformation and failure process under TM condition. Furthermore, the model parameters have clear physical meaning. Finally, using the proposed constitutive model to analyze the mechanical response of the Swedish APSE tunnel excavation process by numerical analysis software FLAC, the modelling results can reflect the TM damage features of tunnels.
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    • 参考文献(15)
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出版历程
  • 收稿日期:  2016-03-20
  • 发布日期:  2017-08-24

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