Experimental Investigation of the Peak Shear Strength Criterion Based on Three-Dimensional Surface Description

doi:10.1007/s00603-017-1390-0

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	Experimental Investigation of the Peak Shear Strength Criterion Based on Three-Dimensional Surface Description
	Liu, Quansheng 1,2; Tian, Yongchao 1; Ji, Peiqi 1; Ma, Hao 1
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2018
卷号	51 期号:4 页码:1005-1025
关键词	Three-dimensional morphology Joint Apparent dip angle Average joint height Peak shear strength
ISSN号	0723-2632
DOI	10.1007/s00603-017-1390-0
英文摘要	The three-dimensional (3D) morphology of joints is enormously important for the shear mechanical properties of rock. In this study, three-dimensional morphology scanning tests and direct shear tests are conducted to establish a new peak shear strength criterion. The test results show that (1) surface morphology and normal stress exert significant effects on peak shear strength and distribution of the damage area. (2) The damage area is located at the steepest zone facing the shear direction; as the normal stress increases, it extends from the steepest zone toward a less steep zone. Via mechanical analysis, a new formula for the apparent dip angle is developed. The influence of the apparent dip angle and the average joint height on the potential contact area is discussed, respectively. A new peak shear strength criterion, mainly applicable to specimens under compression, is established by using new roughness parameters and taking the effects of normal stress and the rock mechanical properties into account. A comparison of this newly established model with the JRC-JCS model and the Grasselli's model shows that the new one could apparently improve the fitting effect. Compared with earlier models, the new model is simpler and more precise. All the parameters in the new model have clear physical meanings and can be directly determined from the scanned data. In addition, the indexes used in the new model are more rational.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000427802600003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4250]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Wuhan Univ, Sch Civil Engn, Key Lab Safety Geotech & Struct Engn Hubei Prov ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Liu, Quansheng,Tian, Yongchao,Ji, Peiqi,et al. Experimental Investigation of the Peak Shear Strength Criterion Based on Three-Dimensional Surface Description[J]. ROCK MECHANICS AND ROCK ENGINEERING,2018,51(4):1005-1025.
APA	Liu, Quansheng,Tian, Yongchao,Ji, Peiqi,&Ma, Hao.(2018).Experimental Investigation of the Peak Shear Strength Criterion Based on Three-Dimensional Surface Description.ROCK MECHANICS AND ROCK ENGINEERING,51(4),1005-1025.
MLA	Liu, Quansheng,et al."Experimental Investigation of the Peak Shear Strength Criterion Based on Three-Dimensional Surface Description".ROCK MECHANICS AND ROCK ENGINEERING 51.4(2018):1005-1025.