Effect of bolt inclination angle on shear behavior of bolted joints under CNL and CNS conditions

doi:10.1007/s11771-020-4342-x

	Effect of bolt inclination angle on shear behavior of bolted joints under CNL and CNS conditions
	Cui Guo-jian 1,3; Zhang Chuan-qing 1,3; Chen Jian-lin 2; Yang Fan-jie 1,3; Zhou Hui 1,3; Lu Jing-jing 1,3
刊名	JOURNAL OF CENTRAL SOUTH UNIVERSITY
	2020-03-01
卷号	27 期号:3 页码:937-950
关键词	bolted joints bolt inclination angle constant normal load (CNL) boundary conditions constant normal stiffness (CNS) boundary conditions direct shear test asperity damage
ISSN号	2095-2899
DOI	10.1007/s11771-020-4342-x
英文摘要	Rock bolts are widely used in rock engineering projects to improve the shear capacity of the jointed rock mass. The bolt inclination angle with respect to the shear plane has a remarkable influence on the bolting performance. In this study, a new artificial molding method based on 3D scanning and printing technology was first proposed to prepare bolted joints with an inclined bolt. Then, the effects of the bolt inclination angle and boundary conditions on the shear behavior and failure characteristic of bolted joints were addressed by conducting direct shear tests under both CNL and CNS conditions. Results indicated that rock bolt could significantly improve the shear behavior of rock joints, especially in the post-yield deformation region. With the increase of bolt inclination angle, both the maximum shear stress and the maximum friction coefficient increased first and then decreased, while the maximum normal displacement decreased monotonously. Compared with CNL conditions, the maximum shear stress was larger, whereas the maximum normal displacement and friction coefficient were smaller under the CNS conditions. Furthermore, more asperity damage was observed under the CNS conditions due to the increased normal stress on the shear plane.
资助项目	Key Projects of the Yalong River Joint Fund of the National Natural Science Foundation of China[U1865203] ; National Natural Science Foundation of China[51279201] ; National Key R&D Program of China[2019YFC0605103] ; National Key R&D Program of China[2019YFC0605100]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL OF CENTRAL SOUTH UNIV
WOS记录号	WOS:000525793200021
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23949]
专题	中科院武汉岩土力学所
通讯作者	Zhang Chuan-qing
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Power China Huadong Engn Corp Ltd, Hangzhou 310014, Peoples R China 3.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 Guo-jian,Zhang Chuan-qing,Chen Jian-lin,et al. Effect of bolt inclination angle on shear behavior of bolted joints under CNL and CNS conditions[J]. JOURNAL OF CENTRAL SOUTH UNIVERSITY,2020,27(3):937-950.
APA	Cui Guo-jian,Zhang Chuan-qing,Chen Jian-lin,Yang Fan-jie,Zhou Hui,&Lu Jing-jing.(2020).Effect of bolt inclination angle on shear behavior of bolted joints under CNL and CNS conditions.JOURNAL OF CENTRAL SOUTH UNIVERSITY,27(3),937-950.
MLA	Cui Guo-jian,et al."Effect of bolt inclination angle on shear behavior of bolted joints under CNL and CNS conditions".JOURNAL OF CENTRAL SOUTH UNIVERSITY 27.3(2020):937-950.