Influence on Soil's Deformation with Consideration of Stress-induced Anisotropy
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摘要: 应力诱导各向异性对复杂应力状态下土体的变形规律有重要影响:建立在常规三轴试验基础,加以各向同性假设的常用土体本构模型不能反映土体的这种特性。偏载作用下的地基土体单元因相对位置的不同而具有不同程度的应力各向异性,能否反映这种各向异性,直接影响到地基变形分析的结果。采用各向异性非线性弹性模型,对偏载作用下的地基土体变形进行有限元数值分析,并和邓肯模型计算结果比较,分析结果表明各向异性的影响不容忽视。Abstract: Induced anisotropy has important influence on soil's deformation character under complex stress state.Traditional constitutive model with isotropic assumption cannot describe this character.Soil under partial load is analyzed with FEM,which apply the anisotropic-non linear elastic model.The kesrlt is compared with commonly used Duncan-Chang model.It is proved from the analysis that the influene on soil of induced anisotropy is considerable.
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Key words:
- stess induced anisotropy /
- constitutive model /
- finite elements method
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