Influences of Shear History and Infilling on the Mechanical Characteristics and Acoustic Emissions of Joints

doi:10.1007/s00603-017-1207-1

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Influences of Shear History and Infilling on the Mechanical Characteristics and Acoustic Emissions of Joints
	Zhang, Liming 2; Meng, Fanzhen 1,2,3; Zhou, Hui 1; Wang, Zaiquan 2; Li, Shaojun 1; Zhang, Chuanqing 1; Kong, Liang 2
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2017
卷号	50 期号:8 页码:2039-2057
关键词	Filled joint Shear history Strength Acoustic emission (AE)
ISSN号	0723-2632
DOI	10.1007/s00603-017-1207-1
英文摘要	Filled joints, which are characterized by high deformability and low shear strength, are among the most critical discontinuities in rock mass and may be sheared repeatedly when subject to cyclic loading. Shear tests were carried out on tension splitting joints, with soil and granular cement mortar particles used as infillings, and the effects of the shear history on the mechanical behavior and acoustic emission (AE) of clean and filled joints were studied. The maximum strength in the subsequent shears was approximately 60% of the peak strength of the first shear for a clean joint, and the friction angle degraded from 63A degrees to 45A degrees after the first shear. The maximum shear strength of the filled joints was lower than 35% of the peak strength of the clean joint under the same normal stress. The change in the shear strength of filled joints with the number of shearing cycles was closely related to the transformation of the shear medium. Rolling friction occurred and the shear strength was low for the granular particle-filled joint, but the strength was elevated when the particles were crushed and sliding friction occurred. The AEs were significantly reduced during the second shear for the clean joint, and the peak AEs were mainly obtained at or near the turning point of the shear stress curve for the filled joint. The AEs were the highest for the cement particle-filled joint and lowest for the dry soil-filled joint; when subjected to repeated shears, the AEs were more complex because of the continuous changes to the shear medium. The evolution of the AEs with the shear displacement can accurately reflect the shear failure mechanism during a single shear process.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000407321700005
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4110]
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.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn ; 2.Qingdao Technol Univ, Coll Sci ; 3.Univ Chinese Acad Sci
推荐引用方式 GB/T 7714	Zhang, Liming,Meng, Fanzhen,Zhou, Hui,et al. Influences of Shear History and Infilling on the Mechanical Characteristics and Acoustic Emissions of Joints[J]. ROCK MECHANICS AND ROCK ENGINEERING,2017,50(8):2039-2057.
APA	Zhang, Liming.,Meng, Fanzhen.,Zhou, Hui.,Wang, Zaiquan.,Li, Shaojun.,...&Kong, Liang.(2017).Influences of Shear History and Infilling on the Mechanical Characteristics and Acoustic Emissions of Joints.ROCK MECHANICS AND ROCK ENGINEERING,50(8),2039-2057.
MLA	Zhang, Liming,et al."Influences of Shear History and Infilling on the Mechanical Characteristics and Acoustic Emissions of Joints".ROCK MECHANICS AND ROCK ENGINEERING 50.8(2017):2039-2057.