| 多向地震荷载对砂土震陷的影响 |
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| 引用本文： | 陈青生,高广运,何俊锋,张先林.多向地震荷载对砂土震陷的影响[J].岩土工程学报,2011,33(7):1022-1028. |
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| 作者姓名： | 陈青生 高广运 何俊锋 张先林 |
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| 作者单位： | (1.同济大学地下建筑与工程系，上海200092 ; 2.同济大学岩土及地下工程教育部重点实验室，上海200092 ; 3.上海市规划和国土资源局，上海200003) |
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| 基金项目： | 国家自然科学基金项目(50878155); 上海市重点学科建设项目(B308); 上海市规土局资助项目(FDZ2008034) |
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| 摘 要： | 利用有限元数值方法模拟不同类型砂土在多向地震荷载输入条件下的动单剪试验，采用弹塑性边界面模型，通过室内动单剪试验实测结果确定模型参数，选取包括大震、中震、近场、远场以及不同土质条件的148组具有完整记录的多向地震荷载时程对不同类型砂土试样进行单向和多向加载，分别进行应力和应变控制式动单剪试验，计算分析震级、震中距以及砂土特性不同的条件下多向地震荷载对砂土震陷问题的影响。结果表明：多向地震荷载对砂土震陷的影响具有较大的不确定性，多向和单向水平地震荷载引起的砂土竖向应变比与震级、震中距和砂土特性密切相关，震级越大，竖向应变比越大;震中距越大，竖向应变比越小;砂土相对密度越大，竖向应变比越大。另外，在应力控制和应变控制荷载试验条件下，多向和单向水平地震荷载引起的砂土竖向应变比差异较大，前者比值大于后者。
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| 关 键 词： | 动单剪试验 多向地震荷载 砂土震陷 地震动特性 砂土特性 |
| 收稿时间： | 2010-04-28 |
Effect of multidirectional earthquake loading on seismic compression of sand |
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| CHEN Qing-sheng,GAO Guang-yun,HE Jun-feng,ZHANG Xian-lin.Effect of multidirectional earthquake loading on seismic compression of sand[J].Chinese Journal of Geotechnical Engineering,2011,33(7):1022-1028. |
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| Authors: | CHEN Qing-sheng GAO Guang-yun HE Jun-feng ZHANG Xian-lin |
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| Affiliation: | (1. Department ofGeotechnical Engineering,Tongji University ,Shanghai 200092, China;2. Key Laboratory of Geotechnical and Underground Engineering of Ministry ofEducation, Tongji University, Shanghai 200092, China; 3. Shanghai MunicipalBureau of Planning and Land Resources, Shanghai 200003, China) |
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| Abstract: | Dynamic simple shear tests on different types of sand under multidirectional earthquake loading are simulated by means of the finite element method.The reduced order bounding surface model is employed and its parameters are determined based on the results obtained from laboratory dynamic simple shear tests.148 groups of ground motions with multi-components from far and/or near fields of moderate and/or strong earthquake events at different site conditions are used as input motions for strain controlled and ... |
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| Keywords: | dynamic simple shear test multidirectional earthquake loading seismic compression of sand characteristic of earthquake loading property of sand |
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