| 桶形基础承载力的三维弹塑性有限元分析 |
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| 引用本文： | 张伟,王晖,孙克俐.桶形基础承载力的三维弹塑性有限元分析[J].天津大学学报(自然科学与工程技术版),2009,42(12):1041-1047. |
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| 作者姓名： | 张伟 王晖 孙克俐 |
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| 作者单位： | 天津大学建筑工程学院,天津,300072 |
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| 基金项目： | 国家高技术研究发展计划(863 计划)资助项目 |
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| 摘 要： | 在经典的Drucker-Prager弹塑性本构模型基础上，通过将线性屈服准则改为抛物线型屈服准则来模拟静水压力对土体的屈服与破坏，并根据试验确定的硬化曲线建立了改进的D—P模型，使该本构模型能很好地模拟大港滩海软土的应力应变关系．利用MARC．MSC程序作为平台，建立了滩海桶形基础承载力有限元分析模型，对桶高、桶径及不同径高比的桶形基础承栽力进行分析．结果表明，实际应用时应采用径高比大于1的桶形基础．
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| 关 键 词： | 软土 桶形基础 几何参数 弹塑性 承载力 |
Three-Dimensional Elasto-Plastic FEM Analysis of Bearing Capacity of Bucket Foundation |
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| ZHANG Wei,WANG Hui,SUN Ke-li.Three-Dimensional Elasto-Plastic FEM Analysis of Bearing Capacity of Bucket Foundation[J].Journal of Tianjin University(Science and Technology),2009,42(12):1041-1047. |
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| Authors: | ZHANG Wei WANG Hui SUN Ke-li |
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| Institution: | (School of Civil Engineering,Tianjin University,Tianjin 300072 ,China) |
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| Abstract: | Based on classic Drucker-Prager elasto-plastic constitutive model,work hardening relation is added to establish an updated D-P model in which linear yielding rule is changed into parabolic rule. So it can simulate the stress-strain relation of soft clay from shallow water in Dagang. Using MARC.MSC program, the model of bearing capacity of bucket foundation in shallow water is established. Bearing capacities of bucket foundations with different diameters ,heights,ratios of diameter to height （D/H） are analyzed. Results show that bucket foundation with D/H〉 1 is better in practice. |
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| Keywords: | soft clay bucket foundation geometrical parameters elasto-plasticity bearing capacity |
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