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Crack Initiation and Damage Evolution of Micritized Framework Reef Limestone in the South China Sea

文献类型：期刊论文

作者Liu, Haifeng1,2; Zhu, Changqi1; Zheng, Kun3; Ma, Chenghao1,4; Yi, Mingxing5
刊名ROCK MECHANICS AND ROCK ENGINEERING
出版日期2021-07-10
期号-页码:11
ISSN号0723-2632
关键词Reef limestone Crack initiation stress Confining pressure Lateral strain Damage evolution
DOI10.1007/s00603-021-02570-4
英文摘要Triaxial compression tests are conducted for the micritized framework reef limestone, which is sampled from a reef island in the South China Sea. The lateral strain response method (LSR) is applied to figure out the crack initiation stress of the reef limestone sample under different confining pressures. With a low porosity and a high dry density, the micritized framework reef limestone has higher compressive strength compared to the rudstone and bioclastic limestone from shallow reef associated strata. Under a confining pressure of 0-8 MPa, the crack initiation stress of the specimen is estimated to be 52%-69% of the peak compressive strength. The crack initiation stress increases when the confining pressure increases. Under different confining pressures, the lateral strain of the specimen when it fails is smaller than terrigenous rocks all the time. Further analysis shows that the lateral strains of the specimen when crack initiation occurs under different confining pressures are similar (with a value of < 0.0004). Between the point of crack initiation and the point of rock dilation, the lateral strain increases in a logarithmic manner under all the confining pressures. After reaching the point of rock dilation, the lateral damage variable is estimated to be 0.56-0.74, larger than the axial damage variable. Based on the analysis of the lateral strain, an empirical relationship between the lateral damage variable and the lateral strain is proposed to portray the damage evolution of the reef limestone specimen.
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA13010201] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA13010301] ; Self-Deployment Project of Innovation Academy of South China Sea Ecology and Environmental Engineering of the Chinese Academy of Sciences[ISEE2020YB09] ; National Natural Science Foundation of China[41877271] ; Natural Science Foundation of Hubei Province of China[2020CFB243]
WOS研究方向Engineering ; Geology
语种英语
出版者SPRINGER WIEN
WOS记录号WOS:000672484700001
源URL[http://119.78.100.198/handle/2S6PX9GI/27389]  
专题中科院武汉岩土力学所
作者单位1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
2.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou 510301, Peoples R China
3.Guizhou Univ, Coll Civil Engn, Guiyang 550025, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Guilin Univ Technol, Coll Civil Engn & Architecture, Guilin 541004, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Haifeng,Zhu, Changqi,Zheng, Kun,et al. Crack Initiation and Damage Evolution of Micritized Framework Reef Limestone in the South China Sea[J]. ROCK MECHANICS AND ROCK ENGINEERING,2021(-):11.
APA Liu, Haifeng,Zhu, Changqi,Zheng, Kun,Ma, Chenghao,&Yi, Mingxing.(2021).Crack Initiation and Damage Evolution of Micritized Framework Reef Limestone in the South China Sea.ROCK MECHANICS AND ROCK ENGINEERING(-),11.
MLA Liu, Haifeng,et al."Crack Initiation and Damage Evolution of Micritized Framework Reef Limestone in the South China Sea".ROCK MECHANICS AND ROCK ENGINEERING .-(2021):11.

入库方式： OAI收割

来源：武汉岩土力学研究所

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