| 西安地区地裂缝带黄土动力特性试验研究 |
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| 引用本文： | 慕焕东,邓亚虹,彭建兵.西安地区地裂缝带黄土动力特性试验研究[J].工程地质学报(英文版),2014,22(5):951-957. |
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| 作者姓名： | 慕焕东 邓亚虹 彭建兵 |
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| 作者单位： | 1.长安大学地质工程与测绘学院 西安 710054; |
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| 基金项目： | 国家自然科学基金项目，长安大学中央高校基本科研业务专项资金项目(CHD2010JC098)资助． |
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| 摘 要： | 汾渭盆地是我国乃至世界上地裂缝最为发育，灾害最为严重的地区。考虑到地裂缝灾害对场地条件的影响，尤其是对场地土体的动力特性及动力响应的影响，本文在等压固结条件下，对西安地区地裂缝带黄土进行不同围压下的固结不排水(CU)动三轴试验，获取动力学参数，在此基础上分析了地裂缝带黄土动剪切模量随动剪应变变化特征曲线以及阻尼比随动剪应变变化特征曲线，并对所获得实验曲线进行回归拟合，进而建立了地裂缝带黄土的等效黏弹性动力本构模型，为进一步分析场地土体的动力响应奠定基础。
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| 关 键 词： | 地裂缝带黄土 动三轴试验 动应力-应变关系 动力响应 |
| 收稿时间： | 2014-04-20 |
EXPERIMENTAL RESEARCH ON LOESS DYNAMIC CHARACTERISTICS AT GROUND FISSURE BELT IN XI′AN AREA |
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| MU Huandong,DENG Yahong,PENG Jianbing.EXPERIMENTAL RESEARCH ON LOESS DYNAMIC CHARACTERISTICS AT GROUND FISSURE BELT IN XI′AN AREA[J].Journal of Engineering Geology,2014,22(5):951-957. |
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| Authors: | MU Huandong DENG Yahong PENG Jianbing |
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| Institution: | 1.College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054;2.Open Research Laboratory of Geotechnical Engineering, Ministry of Land and Resources, Xi'an 710054;3.Key Laboratory of Western China Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054 |
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| Abstract: | The Weihe Basin can be one of the most developed areas associated with ground fissures and geo-hazards in China and even in the world. This paper considers the ground fissure disasters on the influence of site condition, especially to the site soil of the dynamic characteristics and dynamic response. Under the condition of constant pressure consolidation, the consolidated undrained dynamic triaxial tests are carried out on the loess at the Xi'an area ground fissures belt with different confining pressures. The tests result in dynamical parameters. Based on the experimental results, the change laws of dynamic shear modulus with strain relationship and damping ratio with strain relationship are analyzed. And the equivalent visco-elastic constitutive model is established, which lays the foundation for the further analysis of dynamic response of soil field. |
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| Keywords: | Ground fissure belt loess Dynamic triaxial test Dynamic stress and strain relations Dynamic response |
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