| 非饱和黄土的弹塑性软化本构模型 |
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| 引用本文： | 胡再强,张 腾,朱轶韵,陈存礼.非饱和黄土的弹塑性软化本构模型[J].岩土力学,2006,27(Z1):1103-1106. |
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| 作者姓名： | 胡再强 张 腾 朱轶韵 陈存礼 |
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| 作者单位： | 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； |
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| 基金项目： | 陕西高校省级重点实验室重点科研项目资助（00S004） |
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| 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。
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| 关 键 词： | 非饱和黄土 弹塑性 本构模型 |
| 收稿时间： | 2005-10-01 |
Elastoplastic softening constitutive model of unsaturated loess |
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| HU Zai-qiang,ZHANG Teng,ZHU Yi-yun,CHEN Cun-li.Elastoplastic softening constitutive model of unsaturated loess[J].Rock and Soil Mechanics,2006,27(Z1):1103-1106. |
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| Authors: | HU Zai-qiang ZHANG Teng ZHU Yi-yun CHEN Cun-li |
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| Institution: | 1. Institute of Geotechnical Engineering，Xi'an University of Technology，Xi'an 710048，China；
2. Xi'an Design and Research Institute of Coal Industry，Xi'an 710054，China |
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| 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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| Keywords: | unsaturated loess elastoplasticity constitutive model |
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