Experimental and Numerical Studies on the Evolution of Shear Behaviour and Damage of Natural Discontinuities at the Interface Between Different Rock Types

doi:10.1007/s00603-020-02129-9

	Experimental and Numerical Studies on the Evolution of Shear Behaviour and Damage of Natural Discontinuities at the Interface Between Different Rock Types
	Wu, Qiong 1; Jiang, Yaofei 1; Tang, Huiming 1; Luo, Hongming 2; Wang, Xiaohan 1; Kang, Jintao 1; Zhang, Shu 1; Yi, Xin 1; Fan, Liangliang 1
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2020-04-29
页码	24
关键词	Discontinuities with different joint wall material (DDJM) Discontinuities with identical joint wall material (DIJM) Natural discontinuity Shear property Damage evolution
ISSN号	0723-2632
DOI	10.1007/s00603-020-02129-9
英文摘要	Recent research has paid little attention to the shear damage of discontinuities with different joint wall material (DDJM). In this paper, we present an investigation on the evolution of the shear behaviour and the damage of three typical types of natural DDJM in a sliding-prone stratum of China. Experimental direct shear tests were performed on 14 pairs of natural DDJM specimens to examine the changes in the shear strengths and surface damages of the DDJM with increasing normal stresses and an increasing number of shear cycles by evaluating surface damages via damage zone distribution, damage area percentage, and variation of joint roughness coefficient (JRC). The results indicate that the differences in the shear damage between the two halves are closely related to the difference in strength of the two joint walls of the DDJM specimens with similar initial JRC values of the two joint surfaces. Simultaneously, parallel numerical direct shear tests were conducted in PFC3D. The performance of the numerical modeling was examined by comparing the parameters of shear strength, damage area and damage depth of DDJM specimens with those obtained in the experimental direct shear tests. Then the validated models were used to explore the evolution of the damage depth of DDJM specimens during the shearing process. The results demonstrate that the proposed numerical approach has the ability to reproduce the shear behavior and damage of DDJM reasonably and could be used to examine the internal damage of DDJM which are not easy to investigate via laboratory experiments.
资助项目	National Natural Science Foundation of China[41807271] ; National Key R&D Program of China[2019YFC1509705] ; National Key R&D Program of China[2017YFC1501301] ; Natural Science Foundation of Hubei Province of China[2018CFB666]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000529843300001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24065]
专题	中科院武汉岩土力学所
通讯作者	Tang, Huiming
作者单位	1.China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Wu, Qiong,Jiang, Yaofei,Tang, Huiming,et al. Experimental and Numerical Studies on the Evolution of Shear Behaviour and Damage of Natural Discontinuities at the Interface Between Different Rock Types[J]. ROCK MECHANICS AND ROCK ENGINEERING,2020:24.
APA	Wu, Qiong.,Jiang, Yaofei.,Tang, Huiming.,Luo, Hongming.,Wang, Xiaohan.,...&Fan, Liangliang.(2020).Experimental and Numerical Studies on the Evolution of Shear Behaviour and Damage of Natural Discontinuities at the Interface Between Different Rock Types.ROCK MECHANICS AND ROCK ENGINEERING,24.
MLA	Wu, Qiong,et al."Experimental and Numerical Studies on the Evolution of Shear Behaviour and Damage of Natural Discontinuities at the Interface Between Different Rock Types".ROCK MECHANICS AND ROCK ENGINEERING (2020):24.