东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (6): 890-893.DOI: 10.12068/j.issn.1005-3026.2014.06.029

• 资源与土木工程 • 上一篇    下一篇

泥皮条件下土与结构接触面弹塑性本构模型

曾新发1，彭振斌1，何杰2，彭凯3,4   

  1. (1中南大学 地球科学与信息物理学院， 湖南 长沙410083； 2湖南工业大学 土木工程学院， 湖南 株洲412007；3中国水电顾问集团 中南勘测设计研究院， 湖南 长沙410014； 4河海大学 岩土工程科学研究所， 江苏 南京210098)
  • 收稿日期:2013-07-02 修回日期:2013-07-02 出版日期:2014-06-15 发布日期:2014-04-11
  • 通讯作者: 曾新发
  • 作者简介:曾新发(1977-)，男，湖南邵阳人，中南大学博士研究生；彭振斌(1952-)，男，湖南宁乡人，中南大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51108176).

ElastoPlastic Constitutive Model of SoilStructure Interface with Slurry

ZENG Xinfa1， PENG Zhenbin1， HE Jie2， PENG Kai3,4   

  1. 1School of Geoscience and InfoPhysics， Central South University， Changsha 410083， China； 2School of Civil Engineering， Hunan University of Technology， Zhuzhou 412007， China； 3HydroChina Zhongnan Engineering Corporation， Changsha 410014， China； 4Institute of Geotechnical Engineering， Hohai University， Nanjing 210098， China.
  • Received:2013-07-02 Revised:2013-07-02 Online:2014-06-15 Published:2014-04-11
  • Contact: ZENG Xinfa
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摘要： 采用大型单剪仪进行粗粒土与混凝土接触面在膨润土泥皮条件下的剪切试验，揭示泥皮条件下接触面的力学特性与机理.结果表明，峰值强度以及发生剪胀所对应的位置与法向应力大小有关，峰值强度所对应的剪应变大于产生剪胀的位置.基于广义位势理论，建立了考虑剪胀以及应变软化的接触面弹塑性本构模，并将其推广到三维应力空间，拟合了相应的模型参数，并编制了有限元计算程序.结合室内防渗墙模型试验结果，并与Goodman模型进行比较分析，验证了模型的合理性.

关键词: 单剪试验, 膨润土泥皮, 广义位势理论, 本构模型

Abstract: The mechanical behaviors of the interface between coarsegrained soil and concrete were investigated by simple shear tests under the conditions of bentonite slurry. The results indicate that the peak strength and the position of the shear dilatancy are related to normal stress. The shear strain corresponding to the shear dilatation appears to be ahead of that corresponding to the peak value of the shear stress. An elastoplastic constitutive model of soilstructure interface in considering of shear dilatancy and stressstrain softening was formulated in the framework of generalized potential theory. The entire model parameters can be identified by experimental tests. Corresponding finite element program was complied by extending the model to the case of 3D space. Combined with measured values of indoor cutoff wall tests in model slot， the validity of the model was verified and its superiority was demonstrated based on comparison with Goodman model.

Key words: simple shear test, bentonite slurry, generalized potential theory, constitutive model

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