| 基于灰色理论的脆性岩石抗压强度尺寸效应试验研究 |
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| 引用本文： | 朱珍德,邢福东,王军,张爱军.基于灰色理论的脆性岩石抗压强度尺寸效应试验研究[J].岩土力学,2004,25(8):1234-1238. |
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| 作者姓名： | 朱珍德 邢福东 王军 张爱军 |
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| 作者单位： | 河海大学 岩土工程研究所，江苏 南京 210098 |
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| 基金项目： | 国家自然科学基金海外青年合作研究基金项目(No.50128908)。 |
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| 摘 要： | 采用相同直径不同高度的圆柱形白色大理岩及灰岩试样进行单轴压缩试验研究，验证了脆性岩石抗压强度在一定范围内随高径比的增大而减小的规律。依据岩石单轴压缩试验结果，基于灰色预测GM（1，1）模型建立了脆性岩石的单轴抗压强度与试件高径比之间的非线形关系式，该经验公式对脆性岩石具有统一的形式，同时通过式中参数a值反映了由于岩性、试验条件等不同而引起的强度差异。利用该关系式可以很方便地在相关岩土工程中为相似岩石估算其强度值提供参考、借鉴。
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| 关 键 词： | 脆性岩石 抗压强度 尺寸效应 灰色理论 |
| 文章编号： | 1000-7598-(2004)08-1234-05 |
| 收稿时间： | 2003-06-02 |
| 修稿时间： | 2003年6月2日 |
Experimental study on size effect on comperession strength of brittle rock based on grey theory |
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| ZHU Zhen-de,XING Fu-dong,WANG Jun,ZHANG Ai-jun.Experimental study on size effect on comperession strength of brittle rock based on grey theory[J].Rock and Soil Mechanics,2004,25(8):1234-1238. |
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| Authors: | ZHU Zhen-de XING Fu-dong WANG Jun ZHANG Ai-jun |
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| Affiliation: | Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China) |
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| Abstract: | For white marble and limestone specimens of same diameters and different heights, uniaxial compression strength tests are carried out. The regularity that compression strength of brittle rock reduces with the increase of height–to-diameter ratio is certified. Based on the results of compression strength tests and the grey model GM(1,1), the nonlinear equations between uniaxial compression strength and the height–to-diameter ratios of specimens are worked out. This empirical formula for brittle rock is uniform, and the difference of rock strengths with different rock characters and test conditions is reflected by a parameterα. Fortunately, the equations are very convenient to provide consultation and reference for evaluating the strength of the similar rock in the related engineerings. |
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| Keywords: | brittle rock compression strength size effect grey theory |
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