非饱和土耦合本构模型的三维化

马田田; 韦昌富; 颜荣涛; 魏厚振; 田慧会

doi:10.11779/CJGE201402004

非饱和土耦合本构模型的三维化 English Version

马田田^{1, 2},
韦昌富^{1, 2, 3},
颜荣涛³,
魏厚振^{1, 2},
田慧会^{1, 2}

1. 中国科学院武汉岩土力学研究所,湖北武汉 430071; 2. 岩土力学与工程国家重点实验室,湖北武汉 430071; 3. 桂林理工大学土木与建筑工程学院,广西桂林541004

基金项目: 国家自然科学基金项目（11072255,11302243）; 广西自然科学基金重点项目（2011GXNSFE018004）

详细信息

作者简介:
马田田(1986- )，山东济宁人，博士研究生，主要从事非饱和土力学方面的研究工作。E-mail: matiantian050@sina.com。

中图分类号: TU43
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出版历程
- 收稿日期: 2013-04-10
- 发布日期: 2014-02-20

SMP-based representation of a constitutive model for unsaturated soils

MA Tian-tian^{1, 2},
WEI Chang-fu^{1, 2, 3},
YAN Rong-tao³,
WEI Hou-zhen^{1, 2},
TIAN Hui-hui^{1, 2}

1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Wuhan 430071, China; 2. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3. College of Civil and Architectural Engineering, Guilin University of Technology, Guilin 541004, China

摘要

摘要: 非饱和土本构关系模型通常是建立在修正剑桥模型的基础上,并采用了广义的von Mises准则,以描述非饱和土在一般应力状态下的本构行为。该准则假设在π平面上屈服面是个圆形,高估了土体除三轴压缩以外的强度,在平面应变中也会错误估计中主应力比。空间滑动面破坏准则（SMP）考虑了第三应力不变量的影响,屈服面在π平面上为曲边三角形,可以较好地描述一般应力状态下土体的剪切屈服和破坏特性。采用变换应力方法,将SMP准则应用到最近建立的非饱和土耦合本构模型中使其合理的三维化,能够有效地将模型从轴对称应力状态扩展至一般应力状态。根据与试验结果对比表明,改进后的模型在不增加任何参数的情况下,能够较好地模拟非饱和土在三轴伸长等一般应力状态下的行为特性。
- 非饱和土 /
- 耦合本构模型 /
- 空间滑动面破坏准则 /
- 变换应力 /
- 三维化
Abstract:
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- unsaturated soil /
- coupling constitutive model /
- SMP criterion /
- transformed stress /
- three-dimensional stress

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参考文献(14)

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