| 三维弹塑性模型在路堤软基固结分析中应用 |
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| 引用本文： | 孙德安,甄文战,黄文雄.三维弹塑性模型在路堤软基固结分析中应用[J].岩土力学,2009,30(3):669-674. |
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| 作者姓名： | 孙德安 甄文战 黄文雄 |
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| 作者单位： | 1.上海大学 土木工程系，上海 200072；2.纽卡斯尔大学 工程学院，澳大利亚 2308 |
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| 摘 要： | 针对基于SMP准则改进的剑桥模型(MCC-SMP)，采用弹性预测和塑性修正两阶段的回映算法，给出了应力更新算法，根据其算法编制了非线性有限元子程序，进行了三轴压缩、三轴伸长及平面应变等单元试验问题的数值模拟，通过数值分析和试验结果的对比，验证了子程序的精度；采用该本构模型，对澳大利亚某试验段路堤软土地基固结进行了三维有限元分析，重点分析和对比了孔压、沉降及水平位移的变化规律。
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| 关 键 词： | 回映算法 三维 弹塑性模型 固结 曼德尔效应 |
| 收稿时间： | 2007-04-29 |
Application of 3D elastoplastic model to analysis of consolidation behavior of embankment on soft soils |
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| SUN De-an,ZHEN Wen-zhan,HUANG Wen-xiong.Application of 3D elastoplastic model to analysis of consolidation behavior of embankment on soft soils[J].Rock and Soil Mechanics,2009,30(3):669-674. |
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| Authors: | SUN De-an ZHEN Wen-zhan HUANG Wen-xiong |
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| Institution: | 1. Department of Civil Engineering, Shanghai University, Shanghai 200072, China; 2. School of Engineering, University of Newcastle, NSW 2308, Australia |
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| Abstract: | The Cam-clay model revised by SMP criterion (MCC-SMP) is implemented into a commercial software by using return mapping algorithm based on two-stage schemes, which includes elastic predictor and plastic corrector stages. The algorithm for updating the stress is provided. A subroutine for implementing the algorithm is developed. Numerical simulations of triaxial compression, triaxial tension and plane strain tests are performed. The precision of the algorithm is verified by comparing predicted values with experimental results. By using the MCC-SMP model, three-dimensional finite element analysis of consolidation behavior of trial embankment on soft soil, in Australia, is carried out. The changes in pore pressure, settlement and lateral displacement are analyzed and compared with the observed data in situ. |
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| Keywords: | return mapping algorithm three-dimension elastoplastic model consolidation Mandel effect |
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