Failure characteristics of jointed rock-like material containing multi-joints under a compressive-shear test: Experimental and numerical analyses

被引:64
作者
Cao, R. H. [1 ,2 ]
Cao, P. [1 ]
Lin, H. [1 ]
Ma, G. W. [2 ]
Zhang, C. Y. [3 ]
Jiang, C. [1 ]
机构
[1] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Hunan, Peoples R China
[2] Univ Western Australia, Sch Civil Environm & Min Engn, Perth, WA 6009, Australia
[3] Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
Intermittent joints; Rock-like material; Compressive-shear loading; Failure loads; Coalescence; FRACTURE COALESCENCE; MECHANICAL-BEHAVIOR; CRACK COALESCENCE; PARTICLE MODEL; MASS; STRENGTH; SPECIMENS; FISSURES; FLAWS;
D O I
10.1016/j.acme.2017.12.003
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Extensive efforts have been made to gain a better understanding of the failure behaviour of rocks and rock-like materials, but crack propagation and failure processes under compressive-shear loading have not yet been comprehensively investigated. To address this area of research, the peak shear strengths (tau) and failure processes of specimens with multiple joints are studied by lab testing and particle flow code (PFC2D). Four types of failure modes are observed: (a) shear failure through a plane (Mode-I), (b) intact shear failure (Mode-II), (c) oblique shear crack connection failure (Mode-III), and (d) stepped path failure (Mode-IV). The failure mode gradually transformed to Mode-III as alpha (joint inclination angle) increases from 0 degrees to 90 degrees in the specimens. In addition, with increasing joint distance (d) in the specimens, the failure mode changes to Mode-II. As the non-overlapping length between joints (c) in the specimens increases, the failure mode changes to Mode-IV. The joint geometry has a major influence on the shear strength of the jointed specimens. The peak shear strength of specimens with different joint inclination angles is obtained when alpha = 45 degrees. Additionally, the peak shear strength increases as the joint distance (d) and non-overlapping length (c) increase. (C) 2017 Politechnika Wroclawska. Published by Elsevier Sp. z o.o. All rights reserved.
引用
收藏
页码:784 / 798
页数:15
相关论文
共 36 条
[1]   Arbitrary bi-dimensional finite strain cohesive crack propagation [J].
Areias, P. ;
Dias-da-Costa, D. ;
Alfaiate, J. ;
Julio, E. .
COMPUTATIONAL MECHANICS, 2009, 45 (01) :61-75
[2]   Numerical investigation of the effect of joint geometrical parameters on the mechanical properties of a non-persistent jointed rock mass under uniaxial compression [J].
Bahaaddini, M. ;
Sharrock, G. ;
Hebblewhite, B. K. .
COMPUTERS AND GEOTECHNICS, 2013, 49 :206-225
[3]   Hypervelocity impact computations with finite elements and meshfree particles [J].
Beissel, S. R. ;
Gerlach, C. A. ;
Johnson, G. R. .
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 2006, 33 (1-12) :80-90
[4]   Fracture coalescence in rock-type materials under uniaxial and biaxial compression [J].
Bobet, A ;
Einstein, HH .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 1998, 35 (07) :863-888
[5]   Mechanical behavior of an opening in a jointed rock-like specimen under uniaxial loading: Experimental studies and particle mechanics approach [J].
Cao, R. H. ;
Cao, P. ;
Lin, H. ;
Ma, G. W. ;
Fan, X. ;
Xiong, X. G. .
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING, 2018, 18 (01) :198-214
[6]   An Experimental and Numerical Study on Mechanical Behavior of Ubiquitous-Joint Brittle Rock-Like Specimens Under Uniaxial Compression [J].
Cao, Ri-hong ;
Cao, Ping ;
Fan, Xiang ;
Xiong, Xinguang ;
Lin, Hang .
ROCK MECHANICS AND ROCK ENGINEERING, 2016, 49 (11) :4319-4338
[7]   Mechanical Behavior of Brittle Rock-Like Specimens with Pre-existing Fissures Under Uniaxial Loading: Experimental Studies and Particle Mechanics Approach [J].
Cao, Ri-hong ;
Cao, Ping ;
Lin, Hang ;
Pu, Cheng-zhi ;
Ou, Ke .
ROCK MECHANICS AND ROCK ENGINEERING, 2016, 49 (03) :763-783
[8]   Deformability characteristics of jointed rock masses under uniaxial compression [J].
Xin, Chen ;
Liao Zhihong ;
Xi, Peng .
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, 2012, 22 (02) :213-221
[9]   Multi-peak deformation behavior of jointed rock mass under uniaxial compression: Insight from particle flow modeling [J].
Cheng, Cheng ;
Chen, Xin ;
Zhang, Shifei .
ENGINEERING GEOLOGY, 2016, 213 :25-45
[10]   A clumped particle model for rock [J].
Cho, N. ;
Martin, C. D. ;
Sego, D. C. .
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2007, 44 (07) :997-1010