| 筑坝料动力变形特性试验与颗粒流模拟 |
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| 引用本文： | 高德清.筑坝料动力变形特性试验与颗粒流模拟[J].西北地震学报,2019,41(6):1615-1622. |
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| 作者姓名： | 高德清 |
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| 作者单位： | 南京师范大学基建处, 江苏 南京 210046 |
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| 基金项目： | 国家自然科学基金面上项目（51479059） |
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| 摘 要： | 对筑坝反滤料进行室内中型动三轴试验研究，探讨残余变形等动力特性，在此基础上，运用二维颗粒流方法，对相关试验进行数值模拟，为筑坝料的动力特性研究提供一种新的思路和途径。试验结果表明：（1）应力水平对关系曲线斜率无影响；（2）初期体积应变的读数会出现偏小的现象；（3）围压和动应力值过大，会导致模拟结果产生较大误差；（4）正确的细观参数应依据特定的试验结果反复推敲逼近而得。
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| 关 键 词： | 筑坝反滤料 动力变形 动三轴试验 颗粒流方法 数值模拟 |
| 收稿时间： | 2019/4/26 0:00:00 |
Test and Particle Flow Simulation of Dynamic Deformation Characteristics of Dam Materials |
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| GAO Deqing.Test and Particle Flow Simulation of Dynamic Deformation Characteristics of Dam Materials[J].Northwestern Seismological Journal,2019,41(6):1615-1622. |
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| Authors: | GAO Deqing |
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| Institution: | Infrastructure Department of Nanjing Normal University, Nanjing 210046, Jiangsu, China |
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| Abstract: | The residual deformation behavior of dam inverted filler was investigated by means of a medium dynamic triaxial test. On this basis, numerical simulation was carried out using the two-dimension particle flow code. Based on comparison and analysis, some conclusions are summarized as follows:(1) Stress level has no effect on the slope of the relationship curve; (2) initial values of volumetric strain are smaller; (3) overvaluing confining pressure and dynamic stress will produce rather large simulation errors; (4) the correct microscopic parameters should be obtained according to results of specific triaxial tests. |
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| Keywords: | dam inverted filler dynamic deformation dynamic triaxial test particle flow code numerical simulation |
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