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  • 主管单位:
  • 上海市教育委员会
  • 主办单位:
  • 上海理工大学
  • 主  编:
  • 庄松林
  • 地  址:
  • 上海市军工路516号
  • 邮政编码:
  • 200093
  • 联系电话:
  • 021-55277251
  • 电子邮件:
  • xbzrb@usst.edu.cn
  • 国际标准刊号:
  • 1007-6735
  • 国内统一刊号:
  • 31-1739/T
  • 邮发代号:
  • 4-401
  • 单  价:
  • 15.00
  • 定  价:
  • 90.00
李宁,张慧莉,张茂建,江宇,樊勇,沐红元.红层泥岩剪切蠕变特性及非定常本构模型研究[J].上海理工大学学报,2023,45(6):626-635.
红层泥岩剪切蠕变特性及非定常本构模型研究
Shear creep properties and its unsteady constitutive model of the red mudstone
投稿时间:2022-11-15  
DOI:10.13255/j.cnki.jusst.20221115002
中文关键词:  红层泥岩  剪切蠕变试验  非线性加速元件  改进Bingham体  非线性  非定常本构模型
英文关键词:red mudstone  shear creep test  nonlinear acceleration element  modified Bingham body  nonlinear  unsteady constitutive model
基金项目:国家自然科学基金资助项目(40872179,U1765110);上海市自然科学基金资助项目(16ZR1423300)
作者单位
李宁 上海理工大学 环境与建筑学院上海 200093 
张慧莉 上海理工大学 环境与建筑学院上海 200093 
张茂建 上海理工大学 环境与建筑学院上海 200093 
江宇 同济大学 土木工程学院上海 200092 
樊勇 云南省水利水电勘测设计研究院昆明 650021 
沐红元 云南省水利水电勘测设计研究院昆明 650021 
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中文摘要:
      滇中红层泥岩具有显著的流变特性,会给当地工程建设带来安全隐患。选取狮子山隧洞段的红层泥岩进行分级加载蠕变试验,对其蠕变特性开展研究。结果表明,在较低应力状态下,岩样主要表现为衰减蠕变,而在较高应力状态下,岩样将发生从衰减蠕变、等速蠕变直至加速蠕变破坏的全过程蠕变。对岩样各阶段变形数据进行回归分析,建立拟合方程,发现岩样各阶段变形具有显著的非线性变形特性。根据岩样的非线性变形特性提出了1个指数型加速元件,通过与Bingham体中的黏性元件串联形成改进的Bingham体,使其能克服传统Bingham体模拟加速阶段存在的不足,并同时对Hoek体及Kelvin体进行非线性改进,然后通过将非线性Hoek体、Kelvin体与改进Bingham体串联,建立了1个能够描述滇中红层泥岩蠕变特性的非线性、非定常黏弹塑性岩石蠕变模型。通过与不同剪应力下红层泥岩的蠕变试验曲线进行比较,发现理论模型得到的结果与试验数据吻合较好,表明所建模型对于滇中红层泥岩具有较好的适用性。
英文摘要:
      Red mudstone in central Yunnan has significant rheology properties, which can bring hazards to the engineering construction. Using step loading shear creep experiments, the shear creep characteristics of the red mudstone, which from ShiziShan tunnel section, were investigated. The results showed that, the rock samples mainly exhibited decay creep at smaller stresses, while it would undergo the whole process of creep from decay creep, steady creep to accelerate creep damage at larger stresses. Regression analysis was conducted on the deformation data of each stage of the rock sample, and a fitting equation was established, and it was found that the deformation of rock samples at each stage was nonlinear. In accordance with the nonlinear deformation properties of the rock sample, an exponential acceleration element was proposed. By connecting with the viscous element in the Bingham body, a modified Bingham body was formed. It can overcome the shortcomings in acceleration phase simulation of the traditional Bingham body. Additionally, the nonlinear improvements were made to the Hoke and Kelvin body. By series connecting the nonlinear Hoek body, Kelvin body and the modified Bingham body, a nonlinear and unsteady viscoelastic-plastic rock creep model, which can describe the creep characteristics of the red mudstone in central Yunnan, was established. The results from the theoretical model were in good agreement with the experimental data, indicating that the proposed model was reasonable.
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