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首页> 外文会议>Proceedings of the 2nd international symposium on Asia urban geoengineering >Statistical Damage Constitutive Model for Warm Frozen Clay Considering Effect of Damage Threshold
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Statistical Damage Constitutive Model for Warm Frozen Clay Considering Effect of Damage Threshold

机译：考虑损伤阈值影响的暖冻土统计损伤本构模型

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摘要

Like most geotechnical materials, frozen clay is a kind of multiphase particulate composite, which makes the mechanical properties and behaviors show great uncertainty and randomness, for that reason, it is more rational to investigate constitutive relationship of frozen soil using a probabilistic approach rather than a deterministic approach. This research cites previous uniaxial experimental data and theoretical results of two kinds of permafrost for the three temperature conditions. Based on Mohr-Coulomb failure criterion of geotechnical materials and rock damage model, a new statistical damage constitutive model considering the effect of damage threshold is introduced. Finally, through a series of fitting analysis and compared with previous models, it turns out that the new model proposed by this paper can be better close to the test results and reflect the characteristics of deformation for both the warm frozen clay and warm ice-rich frozen clay. Particularly in the elastic stage and the post-peak stage, the experimental and theoretical curves are much closer.
机译：像大多数岩土材料一样，冻土是一种多相颗粒复合材料，其机械性能和行为表现出很大的不确定性和随机性，因此，使用概率方法而不是采用概率方法研究冻土的本构关系更为合理。确定性方法。这项研究引用了先前在三种温度条件下两种永久冻土的单轴实验数据和理论结果。基于岩土材料的摩尔-库仑破坏准则和岩石损伤模型，提出了一种新的考虑损伤阈值影响的统计损伤本构模型。最后，通过一系列的拟合分析并与以前的模型进行比较，结果表明，本文提出的新模型可以更好地接近测试结果，并能反映暖冻土和暖富冰土的变形特征。冷冻黏土。特别是在弹性阶段和峰后阶段，实验和理论曲线更加接近。

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  • 来源
  • 会议地点 Changsha(CN)
  • 作者

    Hongfa Xu; Hansheng Geng; Xiao Chen; Zhun Bai;

  • 作者单位

    State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, PLA University of Science and Technology, Nanjing 210007, Jiangsu, China;

    State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, PLA University of Science and Technology, Nanjing 210007, Jiangsu, China;

    State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, PLA University of Science and Technology, Nanjing 210007, Jiangsu, China;

    State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact, PLA University of Science and Technology, Nanjing 210007, Jiangsu, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Warm frozen clay; Constitutive model; Statistical damage; Damage threshold;

    机译：温暖的冷冻黏土；本构模型；统计损失；损害阈值;

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