| 朱晟,宁志远,钟春欣,楚金旺,高庄平.考虑级配效应的堆石料颗粒破碎与变形特性研究[J].水利学报,2018,49(7):849-857 |
| 考虑级配效应的堆石料颗粒破碎与变形特性研究 |
| Study on particle crush and deformation characteristics considering rockfill gradation effect |
| 投稿时间：2018-01-20 |
| DOI：10.13243/j.cnki.slxb.20180086 |
| 中文关键词: 分形理论 堆石 级配 颗粒破碎 本构模型 |
| 英文关键词: fractal theory rockfill gradation particle fragmentation constitutive model |
| 基金项目:国家重点研发计划项目（2017YFC0404801，2017YFC0404805） |
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| 摘要点击次数: 2029 |
| 全文下载次数: 1034 |
| 中文摘要: |
| 通过6组级配堆石料的相对密度试验和大型三轴试验，分析了堆石料级配与抗剪强度、剪胀性、压缩性及颗粒破碎之间的规律，建立了堆石料广义塑性模型参数与制样分形维数之间的函数关系式，并利用不同级配的三轴试验结果验证其合理性。结果表明：堆石料的性质与级配密切相关，采用制样分形维数的二次函数可以较好地反映级配对其物理力学性质的影响。研究结论可为考虑级配影响的堆石体应力变形计算提供依据。 |
| 英文摘要: |
| The relative density test of six graded rockfill materials and the conventional large-scale triaxial test were carried out. The relationship between the grading of the rockfill and the shear strength,the dilat-ancy, the compressibility and particle fragmentation was analyzed. The relationship between the Generalized Plastic Constitutive model parameters and the fractal dimension of the sample is selected, and the result of the triaxial test with different gradation is used to verify the rationality of the relationship between the mod-el parameters and the hierarchical fractal dimension function. The results show that the physical and me-chanical properties of the rockfill are closely related to the gradation,and the quadratic function of the frac-tal dimension of the sample can better reflect the influence of the gradation on its physical and mechanical properties. The conclusion can provide the basis for the calculation of stress and deformation of rockfill dam considering gradation effect. |
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