Deformation and failure behaviours of rock-concrete interfaces with natural morphology under shear testing

doi:10.1016/j.conbuildmat.2021.123468

	Deformation and failure behaviours of rock-concrete interfaces with natural morphology under shear testing
	Jiang, Quan 1; Yang, Yao 1,2; Yan, Fei 1; Zhou, Junbo 3; Li, Shaojun 1; Yang, Bing 1; Zheng, Hong 1
刊名	CONSTRUCTION AND BUILDING MATERIALS
	2021-07-26
卷号	293 期号:-页码:14
关键词	Rock-concrete Interface Concrete wall strength Normal stress Shear strength formula
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2021.123468
英文摘要	The shearing performance and strength of the interface between rock foundations and structural concrete is a key issue for safety estimation in geotechnical engineering containing rock-concrete interface. In this paper, we focused on the effects of concrete wall strength and normal stress on the unbonding performances of sandstone-concrete interface. First, many sandstone-concrete specimens containing a natural dam bedrock interface had been produced by using "3D optical scanning technology + 3D digital engraving technology + pouring concrete" method. Subsequently, after the sandstone-concrete specimens were prepared, a series of shear tests for these sandstone-concrete specimens were carried out under different normal loading conditions. Finally, the shear characteristics of sandstone-concrete interface were discussed, and an improved rock-concrete shear strength formula was proposed based on the exposed experimental tests and theoretical derivation. Three primary outcomes are as follows: (i) shear damage only occurred at some special positions of the concrete wall, and its degree of shear damage gradually increased with increasing normal stress; (ii) the damage degree of the concrete surface performed obvious localization and nonuniformity was affected by the concrete strength; (iii) the global shear strength and residual strength of the rock-concrete interface were affected by the concrete strength and the normal load. Moreover, an improved rock-concrete shear strength formula was proposed based on the experimental cognition. This strength formula considers both the interface roughness and the mechanical strength of rock/concrete materials, and is more reasonable for estimating the shear strength of rock concrete interfaces in geotechnical engineering. (c) 2021 Elsevier Ltd. All rights reserved.
资助项目	National Natural Science Foundation of China[U1965205] ; National Natural Science Foundation of China[51779251] ; Hubei Province Outstanding Youth Fund[2017CFA060]
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000660291500004
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27509]
专题	中科院武汉岩土力学所
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Hubei Prov Commun Planning & Design Inst Co LTD, Wuhan 430051, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Quan,Yang, Yao,Yan, Fei,et al. Deformation and failure behaviours of rock-concrete interfaces with natural morphology under shear testing[J]. CONSTRUCTION AND BUILDING MATERIALS,2021,293(-):14.
APA	Jiang, Quan.,Yang, Yao.,Yan, Fei.,Zhou, Junbo.,Li, Shaojun.,...&Zheng, Hong.(2021).Deformation and failure behaviours of rock-concrete interfaces with natural morphology under shear testing.CONSTRUCTION AND BUILDING MATERIALS,293(-),14.
MLA	Jiang, Quan,et al."Deformation and failure behaviours of rock-concrete interfaces with natural morphology under shear testing".CONSTRUCTION AND BUILDING MATERIALS 293.-(2021):14.