| 初始应力各向异性土的弹塑性模型 |
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| 引用本文： | 孙德安,姚仰平,殷宗泽.初始应力各向异性土的弹塑性模型[J].岩土力学,2000,21(3):222-226. |
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| 作者姓名： | 孙德安 姚仰平 殷宗泽 |
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| 作者单位： | 1. 名古屋工业大学 VBL , 日本;2. 北京航空航天大学土木系, 北京 100083;3.河海大学岩土工程所, 江苏 南京 210098 |
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| 摘 要： | 剑桥模型沿球应力轴(p 轴)等向塑性体变硬化; 在日本广泛采用的关口 — 太田模型沿初始固结线( K0 线)不等向塑性体变硬化。三轴试验数据表明: 自 K0 状态向伸长方向剪切时, 前者方法计算的体积应变偏小, 而后者方法计算的体积应变偏大。 作者提出一种介于上述两者之间 、考虑初始应力各向异性(如 K0 固结)的不等向塑性体变硬化弹塑性模型。 为了使模型在三维应力下较好地反映土的强度和变形特性, 模型的剪切屈服准则使用 SMP 准则。模型的土性参数与剑桥模型一样, 其预测值与粘土实测值的比较表明, 提出的模型是简单合理的, 可望在实际工程计算中得到使用。
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| 关 键 词： | 弹塑性模型 K0- 固结 各向异性 |
| 文章编号： | 1000-7598-(2000)03-0222-05 |
| 收稿时间： | 1999-08-16 |
| 修稿时间： | 1999年8月16日 |
An elasto-plastic model for soil with initially stress-induced anisotropy |
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| SUN De an ,YAO Yang ping ,YIN Zong ze.An elasto-plastic model for soil with initially stress-induced anisotropy[J].Rock and Soil Mechanics,2000,21(3):222-226. |
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| Authors: | SUN De an YAO Yang ping YIN Zong ze |
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| Institution: | 1.VBL, Nagoya Institute of Technology , Japan) ( 2.Department of Civil Engineering, Beijing University of Aeronautics & Astronautics , Beijing 100083, China) ( 3 .Institute of Geo technical Engineering , Hohai University, Nanjing 210098, China |
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| Abstract: | In this paper, an elasto plastic model is proposed for soil with initially stress induced anisotropy. The hardening axis in the presented model is between the axes of the Cam clay model and the Sekiguchi Ohta model. A transformed stress based on the SMP criterion is used for making the model become a reasonable three dimensional model. Comparisons with experimental data from drained shear tests on K 0 normally consolidated clay in different stress paths show that the proposed model gives excellent predictions. Therefore, the model is more realistic than the Cam clay model or the Sekiguchi Ohta model in predicting the deformation and strength of soils. |
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| Keywords: | elastoplastic model K 0 consolidation anisotropy |
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