Yield criterion of intact structural loess based on integrated structural potential concept

ZHONG Zu-liang; WANG Sui; LIU Xin-rong

doi:10.16285/j.rsm.2015.11.001

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Yield criterion of intact structural loess based on integrated structural potential concept

更新时间：2026-06-25

- Yield criterion of intact structural loess based on integrated structural potential concept
- Vol. 36, Issue 11, Pages: 3041-3046(2015)
- 作者机构：
  
  1. 重庆大学土木工程学院,重庆,400045
  2. 重庆大学山地城镇建设与新技术教育部重点实验室,重庆,400045
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2015.11.001
  CLC： TU444
- Online First：14 June 2018，
  
  Published：2015
- 稿件说明：
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ZHONG Zu-liang, WANG Sui, LIU Xin-rong. Yield criterion of intact structural loess based on integrated structural potential concept[J]. 2015, 36(11): 3041-3046.
DOI：

ZHONG Zu-liang, WANG Sui, LIU Xin-rong. Yield criterion of intact structural loess based on integrated structural potential concept[J]. 2015, 36(11): 3041-3046. DOI： 10.16285/j.rsm.2015.11.001.

摘要

为了研究结构性原状黄土在加载条件下的破坏特性，采用试验的方法对Q2原状黄土进行了非饱和土三轴剪切试验研究。基于试验成果，定义了可以考虑球应力、偏应力和基质吸力等因素的土的结构性变量参数m。利用通过试验提出的m的计算方法，找出抗剪强度参数c、值与m之间的关系，推导出m与c、值的曲线方程，分别将曲线方程代入到Drucker-Prager（D-P）准则方程中对其进行修正，建立了结构性Q2原状黄土的修正屈服准则，该准则可以考虑Q2原状黄土的结构性影响，符合黄土的结构性特性，绘制出可反应结构性参数影响的屈服面，并验证了其合理性。

Abstract

To investigate the destruction characteristics of intact structural loess under loading conditions

triaxial shear tests are conducted on Q2 intact loess. Based on the experimental results

a structural variable parameter m of soil is defined

which can consider the spherical stress

deviatoric stress

matric suction and other factors. By means of method for calculating the structural parameter m based on the experiment

the relationships among shear strength parameters c

and structural parameter m are found out

the curve equations of m with c

are deduced

respectively. By introducing the curve equations into Drucker-Prager (D-P) criterion

a modified yield criterion applicable to Q2 intact loess is established. The modified yield criterion can consider the structural effect of intact Q2 loess and describe the structural characteristics of loess very well. Besides

the yield surface reflecting the impact of structural parameters is drawn. The rationality of the modified yield criterion is verified by comparing the results of the modified yield criterion with those obtained from the triaxial tests.

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