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江苏科技信息 ›› 2019, Vol. 36 ›› Issue (4): 28-30.doi: 10.1004-7530/2019-36-4-28

• 基础研究 • 上一篇    下一篇

非饱和Q2原状黄土应变硬化本构模型试验研究

金艳丽,黄小华   

  1. 广西大学 土木建筑工程学院 工程防灾与结构安全教育部重点实验室,广西 南宁 530004
  • 出版日期:2019-02-10 发布日期:2019-07-09
  • 通讯作者: 黄小华
  • 作者简介:金艳丽（1978— ）,女,河南许昌人,高级工程师,博士;研究方向：土体力学特性及滑坡灾害。
  • 基金资助:
    国家自然科学基金项目(51569004)

Experimental study on strain hardening constitutive model of unsaturated Q2 undisturbed loess

Yanli Jin,Xiaohua Huang   

  1. Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning 530004, China
  • Online:2019-02-10 Published:2019-07-09
  • Contact: Xiaohua Huang

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摘要：

文章对非饱和Q2原状黄土开展常含水量三轴剪切（CW）试验进行研究,发现其应力应变关系呈应变硬化型。据试验结果及Duncan-Chang双曲线模型进行拟合,得到了原状非饱和黄土非线性弹性本构模型及切线模量的表达式,该模型考虑了基质吸力和围压二重因素的影响,具有较好的适用性。

关键词: 非饱和原状黄土, 应变硬化, 非线性弹性, 本构模型

Abstract:

The constant water content triaxial shear （CW） test was carried out on the undisturbed Q2 unsaturated loess. The stress-strain behaviour takes on a strong strain-hardening type. Based on the experimental results and Duncan-Chang hyperbolic model, the nonlinear elastic constitutive model of undisturbed unsaturated loess is obtained. The model has good applicability which takes the influence of matrix suction and confining pressure into account.

Key words: undisturbed unsaturated loess, strain hardening, nonlinear elastic, constitutive model

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