| 结构性软土三维弹塑性损伤本构模型研究 |
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| 引用本文： | 刘汉龙,肖 杨,崔允亮.结构性软土三维弹塑性损伤本构模型研究[J].岩土工程学报,2011,33(4):637. |
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| 作者姓名： | 刘汉龙 肖 杨 崔允亮 |
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| 作者单位： | 1. 河海大学岩土力学与堤坝工程教育部重点实验室，江苏 南京210098；2. 河海大学岩土工程科学研究所，江苏 南京210098 |
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| 基金项目： | 国家杰出青年科学基金项目（50825901）；江苏省自然科学基金攀登学者创新项目（BK2008040）；中央高校基本科研业务费专项资金项目；江苏省土木工程博士研究生科技创新基金项目 |
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| 摘 要： | 基于所提出的岩土材料统一各向同性破坏准则，通过引入椭圆–抛物双屈服面模型以及结构性损伤屈服面，结合复合体损伤概念，建立了三维主应力空间中弹塑性损伤本构模型，该模型能够反映结构性软土应力应变的非线性、剪胀剪缩特性、结构性以及中主应力对变形的影响。通过结构性软土试验结果与模型的计算结果对比分析，表明该模型能够较好地预测结构性软土三维空间的应力–应变特性。
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| 关 键 词： | 破坏准则 弹塑性 损伤特性 本构模型 结构软土 |
Elasto-plastic damage constitutive model in three-dimensional stress space for structured soft soils |
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| LIU Han-long,XIAO Yang,CUI Yun-liang.Elasto-plastic damage constitutive model in three-dimensional stress space for structured soft soils[J].Chinese Journal of Geotechnical Engineering,2011,33(4):637. |
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| Authors: | LIU Han-long XIAO Yang CUI Yun-liang |
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| Affiliation: | 1. Key Laboratory for Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China; |
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| Abstract: | Based on the proposed failure criterion for general geomaterials, an elasto-plastic damage constitutive model in three-dimensional stress space is presented by combining the elliptic-parabolic yielding surfaces, the damage yielding surface and the concept of composite framework for structured soft soils. This model can capture such behaviors as the nonlinear stress-strain, shear dilatancy, damage and strain dependence on the intermediate principal stress for structured soft soil. Besides, it can well describe the stress-strain behaviors of structured soft soils based on the comparisons between the true triaxial test results and the simulations. |
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| Keywords: | failure criterion elasto-plastic behavior damage behavior constitutive model structured soft soils |
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