[1]丛 怡,贾乐鑫,丛 宇,等.不同应力路径下岩石破坏面细观形貌研究[J].防灾减灾工程学报,2019,39(06):938-946953.[doi:10.13409/j.cnki.jdpme.2019.06.008]
 CONG Yi,JIA Lexin,CONG Yu,et al.Experimental Study on Meso-topography of Rock Surface under Various Stress Path[J].Journal of Disaster Prevention and Mitigation Engineering,2019,39(06):938-946953.[doi:10.13409/j.cnki.jdpme.2019.06.008]
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不同应力路径下岩石破坏面细观形貌研究()
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防灾减灾工程学报[ISSN:1672-2132/CN:32-1695/P]

卷:
39卷
期数:
2019年06期
页码:
938-946953
栏目:
论文
出版日期:
2019-12-31

文章信息/Info

Title:
Experimental Study on Meso-topography of Rock Surface under Various Stress Path
文章编号:
1672-2132(2019)06-0938-09
作者:
丛 怡 贾乐鑫 丛 宇 张黎明 王在泉
(青岛理工大学土木工程学院,山东 青岛 266033)
Author(s):
CONG Yi JIA Lexin CONG Yu ZHANG Liming WANG Zaiquan
(School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China)
关键词:
岩石卸荷试验 光栅投影 PFC3D 破裂面粗糙度 能量机制
Keywords:
rock unloading test grating projection PFC3D fracture surface roughness energy mechanism
分类号:
TU443
DOI:
10.13409/j.cnki.jdpme.2019.06.008
文献标志码:
A
摘要:
以大理岩为研究对象,进行三轴卸荷试验及破裂面粗糙度扫描试验,并借助PFC3D颗粒流软件对试样最终破裂面进行提取与重建,研究了粗糙度参数的变化与试样破坏过程及机理之间的关联,得到的主要结论有:加荷路径下Sa随着围压的增加呈递减趋势且两者呈线性关系,高围压条件下岩样破坏面高度分布的对称性好于低围压条件下; 卸荷路径下Sa与Sku可以较好的描述破坏面形貌的分布特性,Ssk随卸荷速率的增加变化规律不明显,破裂面的粗糙程度受卸荷速率与卸荷初始围压的共同影响; 卸荷试验中试样内部的损伤不再是一个逐步累积的过程,而是瞬时劣化失去承载能力。
Abstract:
By grating projection scanning system, the relationship between the roughness parameters and failure mechanism of marble was systematically studied. The final fracture surface was extracted and reconstructed through PFC3D. The surface characteristics were quantified and analyzed. The results show that Sa decreases linearly with the increase of the enclosure pressure under the loading path. The symmetry of the failure plane height of the rock sample under the high enclosure pressure condition is better than that under the low enclosure pressure condition. The Sa and Sku can better describe the distribution characteristics of the failure surface morphology under unloading path. Ssk does not change significantly with the increase of unloading rate. The roughness of the fractured surface is affected by the unloading rate and the initial enclosure pressure of the unloading process. The internal damage of the sample during unloading test deteriorates instantaneously and loss its bearing capacity instead of a gradual damage accumulation process.

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备注/Memo

备注/Memo:
收稿日期:2018-11-15; 修回日期:2019-01-17基金项目:国家自然科学基金项目(41472270)资助作者简介:丛 怡(1987-),女,博士研究生。主要从事岩石力学方面的研究。Email:congyi19871220@163.com
更新日期/Last Update: 2019-12-25