长江科学院院报 ›› 2020, Vol. 37 ›› Issue (1): 137-141.DOI: 10.11988/ckyyb.20180775

• 岩土工程 • 上一篇    下一篇

基于畸变能理论的岩石损伤本构模型研究

刘之喜1, 罗吉安2   

  1. 1.安徽理工大学 土木建筑学院, 安徽 淮南 232001;
    2.安徽理工大学 力学与光电物理学院, 安徽 淮南 232001
  • 收稿日期:2018-07-23 出版日期:2020-01-01 发布日期:2020-01-21
  • 通讯作者: 罗吉安(1978-),男, 江苏徐州人,副教授,博士,研究方向为矿山工程力学的理论与应用。E-mail:19552433@qq.com
  • 作者简介:刘之喜(1992-),男,安徽阜阳人,硕士研究生,研究方向为岩石蠕变、损伤本构。E-mail:1499247744@qq.com
  • 基金资助:
    国家自然科学基金项目(51404013);安徽高校自然科学重大研究项目(KJ2018ZD010);深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1212)

A Rock Damage Constitutive Model Based on Distortion Energy Theory

LIU Zhi-xi1, LUO Ji-an2   

  1. 1.School of Civil Engineering and Architecture, Anhui University of Science and Technology, Anhui232001, China;
    2.School of Mechanics and Optoelectronics Physics , Anhui University of Science andTechnology, Anhui 232001,China
  • Received:2018-07-23 Published:2020-01-01 Online:2020-01-21

摘要: 加-卸载岩石损伤本构模型是预测压气储能硐室长期稳定性的关键,气压对围岩的作用力是反复变化的,目前能适用的本构模型较少,因此,提出一种能够描述分等级加-卸载的岩石损伤本构模型。根据岩石微元强度服从畸变能理论和Weibull 随机分布,建立了一种能够描述分等级加-卸载的岩石损伤本构模型。 通过试验对本构模型进行验证,并结合岩石单轴分等级加-卸载试验数据, 对分等级加-卸载的岩石损伤本构参数进行敏感性分析,确定参数的具体物理意义及参数演化与分等级加-卸载的关系。分等级加-卸载的岩石损伤本构模型参数物理意义明确,便于拟合,能够较好地符合工程实际情况。

关键词: 岩石损伤, 畸变能理论, Weibull随机分布, 分等级加卸载, 本构模型

Abstract: Constitutive model of rock damage under loading and unloading is the key to predict the long-term stability of pressure storage tank. Since pressure on surrounding rock changes repeatedly, few constitutive models can be applied at present. The micro-unit strength of rock obeys the distortion energy strength and the Weibull random distribution. In the light of this, we present a damage constitutive model which could describe the staged loading and unloading of rocks. Furthermore, we verified the constitutive model by experiments, analyzed the sensitivity of constitutive parameters according to test data, determined the physical significance of parameters and selected parameters which could reflect the staged loading and unloading. The physical meaning of damage constitutive model parameters is clear and easy to fit, suitable for practical engineering.

Key words: rock mechanics, distortion energy theory, Weibull random distribution, staged loading and unloading, constitutive model

中图分类号: