| 饱和南京细砂永久应变势模型的试验研究 |
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| 引用本文： | 王炳辉,陈国兴,刘汉龙,胡庆兴.饱和南京细砂永久应变势模型的试验研究[J].世界地震工程,2011,27(2). |
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| 作者姓名： | 王炳辉 陈国兴 刘汉龙 胡庆兴 |
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| 作者单位： | 1. 南京工业大学,岩土工程研究所,江苏南京,210009
2. 河海大学,岩土工程科学研究所,江苏南京,210098 |
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| 基金项目： | 国家自然科学基金重大研究计划项目(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)科研专项项目(200808022); 江苏省高校自然科学重大基础研究项目(08KJA560001) |
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| 摘 要： | 土单元永久应变势的预测模型是土动力学的重要研究内容之一。现有的土单元永久应变势模型没有反映振动孔压增长的影响,难以合理解释地震动作用引起的饱和砂土地基永久变形一般是由土层软化或再固结变形所致的机理。基于饱和南京细砂永久变形动三轴试验结果的有效应力状态分析,研究了试样的永久变形与振动孔压增长的关系,建立了一个能反映振动孔压增长影响的土单元永久应变势模型,给出了土单元永久应变势的数学表达式,分析了土单元永久应变势模型参数的影响因素。初步的验证性试验表明:模型预测与试验测得的试样永久应变势与振动孔压增长曲线比较接近,说明该模型具有一定的合理性。
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| 关 键 词： | 饱和南京细砂 永久应变势 振动孔压 有效应力状态 |
Experimental study on a model of the permanent strain potential for saturated Nanjing fine sand |
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| WANG Binghui,CHEN Guoxing,LIU Hanlong,HU Qingxing.Experimental study on a model of the permanent strain potential for saturated Nanjing fine sand[J].World Information On Earthquake Engineering,2011,27(2). |
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| Authors: | WANG Binghui CHEN Guoxing LIU Hanlong HU Qingxing |
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| Institution: | WANG Binghui1,CHEN Guoxing1,LIU Hanlong2,HU Qingxing1 (1.Institute of Geotechnical Engineering,Nanjing University of Technology,Nanjing 210009,China,2.Geotechnical Research Institute,Hohai University,Nanjing 210098,China) |
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| Abstract: | The research on the model of the permanent strain potential of soil element is an important task of soil dynamics.The previous models on this issue have not considered the influence of the pore water pressure growth in sand soils on the permanent strain potential of soil element,which are difficult to explain the mechanism of the earthquake-induced settlement of foundation mainly caused by soften or re-consolidation deformation of saturated sand soil foundation reasonably.Based on the effective stress state... |
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| Keywords: | Nanjing fine sand permanent strain potential vibration pore water pressure effective stress state |
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