| 考虑围压和密度的饱和砂土液化后单调加载本构方程 |
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| 引用本文： | 张建民,王富强.考虑围压和密度的饱和砂土液化后单调加载本构方程[J].清华大学学报(自然科学版),2008(12). |
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| 作者姓名： | 张建民 王富强 |
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| 作者单位： | 清华大学水利水电工程系; |
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| 基金项目： | 国家“九七三”基础研究基金项目(2007CB714108); 北京市自然科学基金(8061003) |
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| 摘 要： | 为评价地震液化时饱和砂土初始液化后变形,研究了有效围压和密度对饱和砂土液化后单调加载应力应变的影响。基于初始液化后加载试验结果,改进了模拟饱和砂土液化后单调加载的本构方程,考虑了围压和密度的影响,并给出了门槛剪切应变随围压变化的关系式。结果表明:密度的影响可以由临界应力状态线的斜率的变化来体现;有效围压变化的影响可以由门槛剪切应变的变化来反映。
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| 关 键 词： | 土动力学 饱和砂土 液化砂 单调加载 密度和围压 |
Monotonic loading constitutive model of saturated liquefied sand considering the density and confining stress |
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| ZHANG Jianmin,WANG Fuqiang.Monotonic loading constitutive model of saturated liquefied sand considering the density and confining stress[J].Journal of Tsinghua University(Science and Technology),2008(12). |
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| Authors: | ZHANG Jianmin WANG Fuqiang |
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| Institution: | ZHANG Jianmin,WANG Fuqiang(Department of Hydraulic , Hydropower Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | The effects of the post-liquefaction saturated sand density and the effective confining stress on the stress and strain for monotonic loading were investigated to evaluate the deformation of liquefied sand during earthquakes.The entrance shear strain is related to the confining stress for saturated liquefied sand.The constitutive loading model was modified to account for the density and confining stress based on the results of the initial liquefied sand loading tests.The results show that the density influe... |
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| Keywords: | soil dynamics saturated sand liquefied sand monotonic loading density and confining stress |
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