Fracture of rocks in the mountains of Southeast Tibet under hydrothermal conditions at different elevations
文献类型：期刊论文
| 作者 | Wu, Yong2,3 ; Wang, Yongxiang1; Haim, Waisman1; He, Siming2,3; Li, Xinpo2,3
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| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2020-05-04 |
| 页码 | DOI: 10.1007/s10064-020-01806-x |
| 关键词 | Rock collapse Fracture mechanics Water-heat combination Crack models Mountains of Southeast Tibet XFEM |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-020-01806-x |
| 产权排序 | 1 |
| 通讯作者 | Wu, Yong(wyhongyu@163.com) |
| 文献子类 | Article; Early Access |
| 英文摘要 | Significant changes in the hydrothermal conditions in the mountains of Southeast Tibet result in frequent propagation of cracks and disintegration of rock masses. The mechanism that drives this fracturing process might vary considerably depending on elevation. In this work, we employed computational fracture mechanics to study three different fracture mechanisms in which ice or water drives crack propagation. These case studies were corroborated by field observations at low, intermediate, and high elevations. We employed a novel extended finite element method (XFEM), which could be used to propagate cracks without remeshing, to study the effects of the driving forces, crack geometry, and characteristics of perilous rocks. It was found that stress intensity factors induced by freezing of water or by thermal expansion of ice were much higher than induced by hydrostatic pressure, and they resulted in smaller critical crack lengths and tinier collapses at intermediate or high elevations. Moreover, the effects of crack inclination and propagation could have considerable impact on rock collapse. In particular, long cracks with large outward inclination located near the free surface of perilous rocks would tend to fracture easily. |
| 电子版国际标准刊号 | 1435-9537 |
| WOS关键词 | STRESS INTENSITY FACTORS ; MECHANICAL-PROPERTIES ; FROST HEAVE ; THERMAL EXPANSION ; CRACK-GROWTH ; ICE ; XFEM ; AVALANCHES ; STRENGTH ; DAMAGE |
| 资助项目 | National Key R&D Program of China[2018YFC1505003-5] ; National Key R&D Program of China[2016YFB0201003] ; National Natural Science Foundation of China[41672356] ; 135 Strategic Program of the Institute ofMountain Hazards and Environment, CAS[SDS-135-1704] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000530226300001 |
| 出版者 | SPRINGER HEIDELBERG |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; 135 Strategic Program of the Institute ofMountain Hazards and Environment, CAS |
| 源URL | [http://ir.imde.ac.cn/handle/131551/34604]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 通讯作者 | Wu, Yong |
| 作者单位 | 1.Columbia Univ, Dept Civil Engn & Engn Mech, New York, NY 10027 USA 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China; 3.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Wu, Yong,Wang, Yongxiang,Haim, Waisman,et al. Fracture of rocks in the mountains of Southeast Tibet under hydrothermal conditions at different elevations[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2020:DOI: 10.1007/s10064-020-01806-x. |
| APA | Wu, Yong,Wang, Yongxiang,Haim, Waisman,He, Siming,&Li, Xinpo.(2020).Fracture of rocks in the mountains of Southeast Tibet under hydrothermal conditions at different elevations.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,DOI: 10.1007/s10064-020-01806-x. |
| MLA | Wu, Yong,et al."Fracture of rocks in the mountains of Southeast Tibet under hydrothermal conditions at different elevations".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2020):DOI: 10.1007/s10064-020-01806-x. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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