| 增量非线性模型 |
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| 引用本文： | 殷建华
,袁建新.增量非线性模型[J].岩土力学,1985,6(2):5-14. |
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| 作者姓名： | 殷建华 袁建新 |
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| 摘 要： | 本文对增量非线性模型进行了一般的讨论,指出了这类模型和其它一些模型的差别和联系,澄清了一些基本概念。文中介绍了土的非线性剪胀应力-应变模型,用一种砂样的试验数据确定KKG、KG和Ev三种模型的模量。对用这些模型计算的值与相应的试验值进行了比较和分析。结果表明,KKG模型的拟合能力和预测能力都较强,尤其是它能较好地模拟土的剪胀行为,预计的孔隙压力和有效应力路经与试验结果也比较吻合。这也说明,对一般的增量非线性模型作适当简化所得到的模型,是能在一定程度上较好地描述土的本构力学特性的。
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| 关 键 词： | 非线性模型 预测能力 剪胀性 有效应力 应力路径 孔隙压力 体变 试验结果 试验数据 各向异性弹性 |
Incremental Nonlinear Models |
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| Yin Jian hua,Yuan Jian xin.Incremental Nonlinear Models[J].Rock and Soil Mechanics,1985,6(2):5-14. |
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| Authors: | Yin Jian hua Yuan Jian xin |
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| Abstract: | In this paper the incremental nonlinear models are generally discussed, the correlation of this sort of models with others and the difference between them are interpreted, and some basic concepts are clarified. We presented a nonlinear dilatant stress-strain model for soil, which is referred to as KKG model for the sake of simplicity. The experimental results of a sand sample are used to determine the moduli for the following models KKG, KG (the deformation model), and Eν (elastoplastic model) respectively. The comparison of the calculation values of these models with the associated experimental results shows good fittings and prediction of KKG model, and its good simulation of soil dilatant behaviour in particular. The predicted pore pressure and effective stress path have a reasonably good agreement with observed results as well. |
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