| 循环剪切吸水条件下饱和砂土的应力应变规律 |
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| 引用本文： | 王富强,张建民.循环剪切吸水条件下饱和砂土的应力应变规律[J].地震工程与工程振动,2010,30(6). |
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| 作者姓名： | 王富强 张建民 |
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| 作者单位： | 清华大学水沙科学与水利水电工程国家重点实验室;水电水利规划设计总院; |
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| 基金项目： | 973项目课题，国家自然科学基金项目 |
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| 摘 要： | 在实际土工抗震边值问题中,饱和砂土在许多情况下并非处于完全不排水条件,可能由于土性等因素的不同而出现各异的排渗条件。排水条件对土体的动力应力应变响应有较大影响,本文基于新开发的孔隙水注入控制系统,进行了循环剪切条件下饱和砂土吸水试验,研究了剪切吸水对土体动力特性的影响规律。通过试验发现:剪切吸水条件下砂土的抗液化强度较不排水条件下降低,同样的循环剪切条件下轴向应变发展更大;试样的抗液化强度降低和轴向应变增加程度随剪切吸水率的增大而增加。基于对饱和砂土体变规律的已有研究,本文初步解释了剪切吸水条件下饱和砂土应力应变特性规律的物理实质。
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| 关 键 词： | 剪胀性砂土 剪切吸水效应 循环加载 应力应变响应 |
Stress-strain response of saturated sand during cyclic water absorption shearing |
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| WANG Fuqiang,ZHANG Jianmin.Stress-strain response of saturated sand during cyclic water absorption shearing[J].Earthquake Engineering and Engineering Vibration,2010,30(6). |
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| Authors: | WANG Fuqiang ZHANG Jianmin |
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| Institution: | WANG Fuqiang1,2,ZHANG Jianmin1(1.State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China,2.Hydropower and Water Resources Planning & Design General Institute,Beijing 100011,China) |
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| Abstract: | In many cases of boundary value problems in geotechnical earthquake engineering, saturated sand is not in a completely undrained condition; it may behave as in different drainage conditions due to the factors, such as soil properties or different level types. In order to study the influence of drainage conditions, water absorption tests of saturated sand under cyclic shearing were carried out using pore water injection control system, which was newly developed with the help of cyclic triaxial devices. It is... |
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| Keywords: | dilative sands water absorption effect in shearing cyclic shearing stress strain response |
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