Dynamic Model of Fracture Normal Behaviour and Application to Prediction of Stress Wave Attenuation Across Fractures
文献类型：期刊论文
| 作者 | Zhao, J.4; Li, H. B.3; Zhao, X. B.1; Cai, J. G.2 |
| 刊名 | ROCK MECHANICS AND ROCK ENGINEERING
 |
| 出版日期 | 2008 |
| 卷号 | 41期号:5页码:671-693 |
| 关键词 | wave propagation rock masses fractures dynamic normal behaviour |
| ISSN号 | 0723-2632 |
| DOI | 10.1007/s00603-006-0127-2 |
| 英文摘要 | The purpose of this paper is to establish a dynamic constitutive model of fracture normal behaviour, based on laboratory tests of artificial fractures cast by cement mortar. A series of tests are systematically carried out under quasi-static (10-1MPa/s) up to highly dynamic (103 MPa/s) monotonic loading conditions. The normal stress-fracture closure response is measured at different loading rates. Based on the measured curves, a nonlinear (hyperbolic) dynamic model of fracture normal behaviour, termed as dynamic BB model, is proposed. The dynamic model is modified from the existing BB model of static normal behaviour of fractures by taking into account the loading-rate effect. Two important dynamic parameters of fractures, FSC (d) (dynamic fracture stiffness constant, which describes the incremental ratio of dynamic initial stiffness) and FCC (d) (dynamic fracture closure constant, which describes the decremental ratio of dynamic maximum allowable closure), are identified. They indicate the quantitative degree of loading-rate effect on fracture normal behaviour subjected to dynamic loads. For practical application, the new model is incorporated into the Universal Distinct Element Code (UDEC) and subsequently, UDEC modelling of normally incident P-wave transmission across single fractures with the dynamic BB model is conducted. Wave transmission coefficient is obtained for various combinations of fracture dynamic parameters, as well as different wave amplitudes and frequencies. The numerical results show that wave transmission coefficient for a fracture with the dynamic BB model is greater than that for a fracture with the static BB model. In addition, a fracture with higher values of FSC (d) and FCC (d) leads to higher transmission (lower attenuation). |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000260880300002 |
| 出版者 | SPRINGER WIEN |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3179]  |
| 专题 | 岩土力学所知识全产出_期刊论文 |
| 作者单位 | 1.Nanjing Univ, Dept Earth Sci; 2.Tritech Consultants Pte Ltd; 3.Chinese Acad Sci, Inst Rock & Soil Mech 4.Ecole Polytech Fed Lausanne, Rock Mech Lab; |
| 推荐引用方式 GB/T 7714 | Zhao, J.,Li, H. B.,Zhao, X. B.,et al. Dynamic Model of Fracture Normal Behaviour and Application to Prediction of Stress Wave Attenuation Across Fractures[J]. ROCK MECHANICS AND ROCK ENGINEERING,2008,41(5):671-693. |
| APA | Zhao, J.,Li, H. B.,Zhao, X. B.,&Cai, J. G..(2008).Dynamic Model of Fracture Normal Behaviour and Application to Prediction of Stress Wave Attenuation Across Fractures.ROCK MECHANICS AND ROCK ENGINEERING,41(5),671-693. |
| MLA | Zhao, J.,et al."Dynamic Model of Fracture Normal Behaviour and Application to Prediction of Stress Wave Attenuation Across Fractures".ROCK MECHANICS AND ROCK ENGINEERING 41.5(2008):671-693. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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