| 岩石脆性破裂的重正化研究及数值模拟 |
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| 引用本文： | 陈忠辉,谭国焕,杨文柱.岩石脆性破裂的重正化研究及数值模拟[J].岩土工程学报,2002,24(2):183-187. |
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| 作者姓名： | 陈忠辉 谭国焕 杨文柱 |
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| 作者单位： | 中国矿业大学(北京校区)资源开发系；香港大学土木工程系；香港大学土木工程系 北京100083；香港； |
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| 基金项目： | 国家自然科学基金资助项目(19902019;59734090) |
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| 摘 要： | 针对脆性岩石细观强度非均匀、离散性特征 ,利用重正化群理论建立了岩石临界破坏重正化模型 ,系统研究了岩石宏观临界强度和细观强度的定量关系 ,采用条件概率方法处理模型中细观单元间的应力转移 ,从而求得岩石临界破裂时的临界概率P ,着重研究了岩石均质度与岩石峰值强度的理论关系。此外 ,利用岩石破裂过程分析程序 (RFPA)模拟了岩石单轴压缩下细观破裂演化至宏观破裂的全过程。研究结果表明 ,数值模拟和重正化群得到的岩石峰值强度十分吻合
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| 关 键 词： | 脆性破裂 重正化群 数值模拟 |
| 文章编号： | 1000-4548(2002)02-0183-05 |
| 修稿时间： | 2001年8月27日 |
Renormalization study and numerical simulation on brittle failure of rocks |
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| CHEN Zhonghui,THAM L.G.,YEUNG M.R..Renormalization study and numerical simulation on brittle failure of rocks[J].Chinese Journal of Geotechnical Engineering,2002,24(2):183-187. |
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| Authors: | CHEN Zhonghui THAM LG YEUNG MR |
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| Affiliation: | 1.China University of Mining Technology Beijing 100083 China 2.Department of Civil Engineering The University of Hong Kong |
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| Abstract: | In this paper, the critical failure model is established by renormalization group theory approach, and the relation between the peak strength and the mean strength of the elements is studied. The stress transfer among the elements is defined with the conditional probability method.The critical probability P * is obtained. On the other hand, the whole process of brittle fracture of rock has also been simulated numerically from micro fracture to macro fracture by using the rock failure process analysis(RFPA) code. The peak strengths obtained by the numerical model agree fairly well with those obtained by the renormalization group theory. |
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| Keywords: | brittle failure renormalization group numerical simulation |
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