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饱和砂土液化后流体本构模型研究

周恩全, 王志华, 陈国兴, 吕丛

周恩全, 王志华, 陈国兴, 吕丛. 饱和砂土液化后流体本构模型研究[J]. 岩土工程学报, 2015, 37(1): 112-118. DOI: 10.11779/CJGE201501013
引用本文: 周恩全, 王志华, 陈国兴, 吕丛. 饱和砂土液化后流体本构模型研究[J]. 岩土工程学报, 2015, 37(1): 112-118. DOI: 10.11779/CJGE201501013
shu
ZHOU En-quan, WANG Zhi-hua, CHEN Guo-xing, LÜ Cong. Constitutive model for fluid of post-liquefied sand[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 112-118. DOI: 10.11779/CJGE201501013
Citation: ZHOU En-quan, WANG Zhi-hua, CHEN Guo-xing, LÜ Cong. Constitutive model for fluid of post-liquefied sand[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 112-118. DOI: 10.11779/CJGE201501013
shu

饱和砂土液化后流体本构模型研究  English Version

  • 1. 南京工业大学岩土工程研究所,江苏 南京 210009; 2. 南京工业大学城市地下空间研究中心,江苏 南京 210009

基金项目: 国家自然科学基金项目（50978235）
详细信息
    作者简介:

    周恩全(1986- ),男,山东烟台人,博士研究生,主要从事土动力学和岩土地震工程研究。E-mail: enquan1986@126.com。

    通讯作者:

    陈国兴

  • 中图分类号: TU413

Constitutive model for fluid of post-liquefied sand

  • 1. Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. Research Center of Urban Underground Space, Nanjing University of Technology, Nanjing 210009, China

摘要

    摘要
  • 摘要: 利用空心圆柱扭剪仪开展了饱和南京细砂液化后常速率加载试验,考虑了有效固结压力和加载速率对饱和南京细砂液化后流体特性的影响,结果表明：液化后静加载过程中剪应力与孔压比的发展具有明显的二阶段特性,且剪应力与孔压比的发展有着良好的线性相关关系,有效围压及加载速率对二者的关系有着明显影响;据此提出一种符合液化后静加载过程的率相关性及孔压相关性流体本构模型,该模型将构成饱和砂土强度的土颗粒摩阻力与土-水黏滞阻力分别表示为时变型和非时变型剪切稀化流体;最后进行了该模型的验证性试验,并将模型预测结果与其他学者研究成果对比,验证试验及对比结果均表明该模型具有较好的适用性。
    Abstract: The static load tests on post-liquefied saturated Nanjing fine sand are carried out using the hollow cylinder apparatus. The effect of the initial effective confining pressure and loading rate on the fluid characteristics of post-liquefied saturated Nanjing fine sand is taken into account. The results show that the development process of the shear stress and pore water pressure ratio have obvious two-stage characteristics in static loading process, and they have a a good linear relationship. The effective confining pressure and the static loading rate have obvious influence on the relationship between them. On this basis, a constitutive model for fluid with rate and pore water pressure-dependent static loading process is proposed. In this model the friction resistance between soil particles and the viscous resistance between soil and water are respectively expressed as the thixotropic shear-thinning fluid and non-time-variant shear-thinning fluid. Finally, experiments and comparisons between the predicted curves and other researchers′test results are carried out, indicating that the proposed constitutive model has good applicability.
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    • 参考文献(22)
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出版历程
  • 收稿日期:  2014-04-28
  • 发布日期:  2015-01-19

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