Numerical Study of Anisotropic Weakening Mechanism and Degree of Non-Persistent Open Joint Set on Rock Strength with Particle Flow Code

doi:10.1007/s12205-020-1482-3

	Numerical Study of Anisotropic Weakening Mechanism and Degree of Non-Persistent Open Joint Set on Rock Strength with Particle Flow Code
	Cui, Jie 1,2; Jiang, Quan 2; Li, Shaojun 2; Feng, Xiating 2; Zhang, Youliang 1; Shi, Ying-en 2
刊名	KSCE JOURNAL OF CIVIL ENGINEERING
	2020-03-01
卷号	24 期号:3 页码:988-1009
关键词	Anisotropy Non-persistent open joint set Failure mechanism Empirical strength formula Particle mechanics model
ISSN号	1226-7988
DOI	10.1007/s12205-020-1482-3
英文摘要	The strength of a rock cut by non-persistent open joint set is controlled by complex interactions of the joint network and intact rock bridges. An extensive series of uniaxial numerical tests of the particle models are carried out under different joint fabrics and rock compression-tension strength ratios. The test results show joint dip angle is the main factor controlling the overall anisotropic strength characteristics. With joint dip angle increasing, the main failure modes successively appear as splitting failure, block rotation failure, step-path failure, planar failure, and splitting failure. Accordingly, the strength generally shows a trend of decreasing first and then increasing, and the joint dip angle corresponding to the minimum strength is biased towards 0 degrees, usually at 15 degrees-30 degrees. The damage of rock bridges is mainly controlled by tensile failure, except in planar failure mode. Joint spacing has an impact on the local anisotropic strength characteristics. The joint spacing and persistence ratio jointly control the degree of penetration difficulty of the rock bridges. The compression-tension strength ratio of intact rock uniformly affects the absolute magnitude of the jointed rock strength and does not affect its anisotropic characteristics. Based on the weakening mechanism, an empirical strength formula is established to realize the practical equivalent characterization of the anisotropic weakening degrees of the non-persistent open joint set on the rock strength.
WOS研究方向	Engineering
语种	英语
出版者	KOREAN SOCIETY OF CIVIL ENGINEERS-KSCE
WOS记录号	WOS:000512984200028
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23430]
专题	中科院武汉岩土力学所
通讯作者	Jiang, Quan
作者单位	1.Hainan Univ, Coll Civil Engn & Architecture, Haikou 570228, Hainan, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Cui, Jie,Jiang, Quan,Li, Shaojun,et al. Numerical Study of Anisotropic Weakening Mechanism and Degree of Non-Persistent Open Joint Set on Rock Strength with Particle Flow Code[J]. KSCE JOURNAL OF CIVIL ENGINEERING,2020,24(3):988-1009.
APA	Cui, Jie,Jiang, Quan,Li, Shaojun,Feng, Xiating,Zhang, Youliang,&Shi, Ying-en.(2020).Numerical Study of Anisotropic Weakening Mechanism and Degree of Non-Persistent Open Joint Set on Rock Strength with Particle Flow Code.KSCE JOURNAL OF CIVIL ENGINEERING,24(3),988-1009.
MLA	Cui, Jie,et al."Numerical Study of Anisotropic Weakening Mechanism and Degree of Non-Persistent Open Joint Set on Rock Strength with Particle Flow Code".KSCE JOURNAL OF CIVIL ENGINEERING 24.3(2020):988-1009.