| 循环何载下饱和南京细砂的孔压增量模型 |
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| 引用本文： | 王炳辉,陈国兴.循环何载下饱和南京细砂的孔压增量模型[J].岩土工程学报,2011,33(2):188-194. |
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| 作者姓名： | 王炳辉 陈国兴 |
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| 作者单位： | 南京工业大学岩土工程研究所，江苏 南京 210009 |
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| 基金项目： | 国家自然科学基金项目重大研究计划(90715018); 国家重点基础研究发展计划项目(2007CB714200); 国家公益性行业(地震)科研专项(200808022) |
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| 摘 要： | 等幅循环荷载的不排水三轴试验的结果表明,饱和南京细砂孔压比曲线的形状随循环周数比增大而发生规律性的变化.引入孔压增量比的概念,并定义有效动剪应力比和有效应力对数衰减率,发现孔压增量比的发展过程可分为下降段、平稳段和上升段;在平稳段和上升段,孔压增量比的累积量与有效动剪应力比的自然对数具有很好的线性关系,并推导出第N周的...
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| 关 键 词： | 循环荷载 南京细砂 孔压增量模型 孔压增量比 有效动剪应力比 有效应力对数衰减率 |
Pore water pressure increment model for saturated Nanjing fine sand subjected to cyclic loading |
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| WANG Bing-hui,CHEN Guo-xing.Pore water pressure increment model for saturated Nanjing fine sand subjected to cyclic loading[J].Chinese Journal of Geotechnical Engineering,2011,33(2):188-194. |
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| Authors: | WANG Bing-hui CHEN Guo-xing |
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| Affiliation: | Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China; |
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| Abstract: | Undrained triaxial tests are carried out for saturated Nanjing fine sand subjected to uniform cyclic loading.The curve shapes of the excess pore water pressure(EPWP) ratio regularly change with the increase of the ratio of number of cycles.The concept of EPWP increment ratio is introduced.Two new concepts of the effective dynamic shear stress ratio and the log decrement of effective stress are defined.It is found that the development of the EPWP increment ratio can be divided into three stages: descending s... |
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| Keywords: | cyclic loading Nanjing fine sand pore water pressure model pore water pressure increment ratio effective dynamic shear stress ratio log decrement of effective stress |
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