| 刘汉龙,周 健.大地震作用下构造物、地基与流体协同变形分析[J].水利学报,1999,30(9):0051-0057 |
| 大地震作用下构造物、地基与流体协同变形分析 |
| Analysis on deformations due to soil structure water interaction during the strong earthquake |
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| DOI： |
| 中文关键词: 大地震 沉箱结构 防波堤 液化 残余变形 |
| 英文关键词: strong earthquake caisson structure effective stress analysis residual deformation liquefaction |
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| 中文摘要: |
| 本文利用有限单元方法，对1995年1月17日本阪神大地震中防波堤破坏进行了有效应力数值模拟。计算中考虑了混凝土沉箱结构、地基基础和海水的共同作用，土体非线性本构关系采用考虑动主应力轴方向偏转影响的多重剪切机构塑性模型。数值模拟结果与地震后实际观测值基本一致。计算结果还表明，地基液化及孔隙水压力升高对防波堤的抗震性能有重要影响。 |
| 英文摘要: |
| In order to identify the damage mechanism of breakwater during the strong earthquake occurred to Hanshin, Japan, 1995, an effective stress analysis is performed with the interaction of soil structure water taken into account. The nonlinear constitutive model used in the study is a multiple shear mechanism type in strain space and the effect of rotation of principal stress axis direction has been considered. The result of numerical simulation is in good agreement with the observation. The results also show that liquefaction and high excess pore water pressure in the foundation has significantly affected the performance of breakwater. |
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