| 以塑性功为硬化参数的Q2原状黄土弹塑性模拟 |
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| 引用本文： | 刘新荣,钟祖良,张永兴,王吉明.以塑性功为硬化参数的Q2原状黄土弹塑性模拟[J].岩土力学,2009,30(5):1215-1220. |
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| 作者姓名： | 刘新荣 钟祖良 张永兴 王吉明 |
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| 作者单位： | 重庆大学,土木工程学院,重庆,400045 |
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| 基金项目： | 国家自然科学基金创新研究群体基金，教育部新世纪优秀人才支持计划 |
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| 摘 要： | 为了研究非饱和Q2原状黄土的力学特性，通过三轴压缩试验、各向等压试验和三轴试验卸载、再加载试验获得Q2原状黄土的力学参数，并结合弹塑性力学理论，推导出Q2原状黄土的屈服函数和以塑性功为硬化参数的硬化规律，采用相关联流动规则，建立非饱和Q2原状黄土弹塑性本构模型。通过模型计算与试验实测值比较，表明该模型基本上能反映Q2原状黄土的力学特性。
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| 关 键 词： | Q2黄土 塑性功 硬化参数 屈服面 本构模型 |
| 收稿时间： | 2008-09-09 |
Elastoplastic modeling of unsaturated intact Q2 loess with plastic work as hardening parameter |
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| LIU Xin-rong,ZHONG Zu-liang,ZHANG Yong-xing,WANG Ji-ming.Elastoplastic modeling of unsaturated intact Q2 loess with plastic work as hardening parameter[J].Rock and Soil Mechanics,2009,30(5):1215-1220. |
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| Authors: | LIU Xin-rong ZHONG Zu-liang ZHANG Yong-xing WANG Ji-ming |
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| Institution: | College of Civil Engineering, Chongqing University, Chongqing, 400044, China |
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| Abstract: | In order to research the mechanical characteristics of unsaturated intact Q2 loess, the mechanical parameters of unsaturated intact Q2 loess are derived entirely from results of isotropic compression and conventional triaxial compression tests. The yield function and the hardening rule with plastic work as hardening parameter are derived by test results and the theory of soil plastic mechanics. The Elastoplastic model of unsaturated intact Q2 loess is set up. The comparison between the measured and predicted stress-strain relations and volume change behavior for unsaturated intact Q2 loess shows that the model can predict soil behavior of shear compression and dilation with good accuracy. |
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| Keywords: | Q2 loess plastic work hardening parameter yield surface constitutive model |
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