Elastoplastic softening constitutive model of unsaturated loess

HU Zai-qiang; ZHANG Teng; ZHU Yi-yun; CHEN Cun-li

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Elastoplastic softening constitutive model of unsaturated loess

更新时间：2026-06-25

- Elastoplastic softening constitutive model of unsaturated loess
- Vol. 27, Issue S1, (2006)
- 作者机构：
  
  1. 西安理工大学岩土工程岩土所,西安,710048
  2. 煤炭工业西安设计研究院,西安,710054
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：15 December 2006，
  
  Published：2006
- 稿件说明：
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HU Zai-qiang, ZHANG Teng, ZHU Yi-yun, et al. Elastoplastic softening constitutive model of unsaturated loess[J]. 2006, 27(S1).
DOI：

HU Zai-qiang, ZHANG Teng, ZHU Yi-yun, et al. Elastoplastic softening constitutive model of unsaturated loess[J]. 2006, 27(S1). DOI：

摘要

通过对陕西杨陵地区的非饱和黄土进行等应力比压缩试验和常规三轴试验，在对试验结果的应力-应变曲线特性进行分析的基础上，由试验结果直接确定屈服函数，根据Drucker公设，即相适应的流动法则，选择合适的硬化参数，建立了非饱和黄土的弹塑性本构模型，并将模型计算结果与试验结果进行比较。结果表明，该模型能够较好地模拟非饱和黄土与固结应力有关的应变软化现象，计算的变形规律与试验结果基本吻合。

Abstract

Through conventional triaxial test and equal stress-ratio pressure test of intact loess sample

base on the result of the stress-strain characteristics curve analysis

the yield function of the model is directly determined from experimental data. According to the Drucker’s postulation

the elastoplastic model of unsaturated loess is proposed by selecting proper hardening parameter

and carried on the comparison analysis of the test result and the model computed result. The results show that the model can simulate the softening phenomenon which is related with the consolidated stress; and the results of the calculation coincide with the results of tests.

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