| 单、双向动三轴试验条件下饱和砂动力特性对比 |
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| 引用本文： | 黄博,胡俊清,施明雄,陈云敏. 单、双向动三轴试验条件下饱和砂动力特性对比[J]. 地震工程学报, 2011, 33(Z1) |
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| 作者姓名： | 黄博 胡俊清 施明雄 陈云敏 |
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| 作者单位： | 浙江大学岩土工程研究所,教育部软弱土与环境土工重点实验室,浙江杭州310027 |
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| 基金项目： | 国家自然科学基金(50708095,50908207); 国家重点基础研究发展计划项目(2007CB714203); 地震行业科研专项(200808022); 浙江省重点创新团队支持计划资助(2009R50050) |
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| 摘 要： | 在饱和砂土地震液化评估中,多用单向动三轴试验代替双向动三轴试验获得土体的抗液化强度。由于单向激振和双向激振产生的应力路径不同,土的动力特性受应力路径影响,其合理性尚待证明。本文利用双向振动三轴仪分别采用单、双向振动形式进行饱和砂土振动液化试验,对比了相同动剪应力作用下累积孔压和动强度,分析了较大循环振次作用下单、双向振动方式使试样动力响应产生差异的原因,提出了利用单向三轴试验代替双向振动模拟地震循环剪应力获得砂土动力特性的室内试验方法的适用条件。
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| 关 键 词： | 饱和砂 单向振动三轴试验 双向振动三轴试验 动力特征 |
Comparison of Dnamic Properties of Saturated Sand under Unidirectional and Two-directional Cyclic Triaxial Tests Conditions |
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| HUANG Bo,HU Jun-qing,SHI Ming-xiong,CHEN Yun-min. Comparison of Dnamic Properties of Saturated Sand under Unidirectional and Two-directional Cyclic Triaxial Tests Conditions[J]. China Earthguake Engineering Journal, 2011, 33(Z1) |
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| Authors: | HUANG Bo HU Jun-qing SHI Ming-xiong CHEN Yun-min |
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| Affiliation: | HUANG Bo,HU Jun-qing,SHI Ming-xiong,CHEN Yun-min(Institute of Geotechnical Engineering,MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hanghzou 310027,China) |
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| Abstract: | In evaluating the potential liquefaction of sandy deposits during earthquake,the unidirectional cyclic dynamic triaxial test is often used to determine the undrained shear strength of soil instead of the two-directional test.Because the dynamic stress paths induced by unidirectional cyclic triaxial test and two-directional one are not same,the above suppose is still in question,as it is well known the mechanical behavior of soils is strongly affected by the path.In this paper,both unidirectional and two-dir... |
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| Keywords: | Saturated sand Unidirectional cyclic triaxial tests Two-directional cyclic triaxial tests Dynamic proerty |
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