Compression failure conditions of concrete-granite combined body with different roughness interface

作     者：Huan Gao Yue Zhai Tienan Wang Yubai Li Fandong Meng Houquan Zhang Yan Li Huan Gao;Yue Zhai;Tienan Wang;Yubai Li;Fandong Meng;Houquan Zhang;Yan Li

作者机构：School of Geology Engineering and GeomaticsChang’an UniversityXi’an 710064China Key Laboratory of Western China’s Mineral Resources and Geological Engineering of Ministry of EducationChang’an UniversityXi’an 710054China State Key Laboratory of Geomechanics and Deep Underground EngineeringChina University of Mining and TechnologyXuzhou 221116China 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2023年第33卷第3期

页      面：297-307页

核心收录：

学科分类：08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：The authors would like to acknowledge financial supports from the National Natural Science Foundation of China(Nos.41941019 and 52274145) Department of Science and Technology of Shaanxi Province(No.2021TD-55) “111”Center,Program of the Ministry of Education of China(No.B18046) Natural Science Foundation of Shaanxi Province(No.2020JQ-373) the Fundamental Research Funds for the Central Universities,CHD(No.300102261101) 

主　　题：Concrete-granite combined body Compression failure condition Interface roughness Mechanical model 

摘      要：Bedrock and concrete lining are typical composite structures in the engineering field and the stability of the geological body and engineering body is directly connected to the mechanical properties of the composite *** this background,the study provides the transverse isotropic equivalent model of concrete-granite double-layer composite based on the notion of strain energy *** that the strength failure of concrete and granite meets the Mohr-Coulomb criterion,then the strength failure model of the combined body considering the joint roughness coefficient(JRC)is derived,and the influences of JRC,the height ratio of concrete to granite,and confining pressure on the strength failure characteristics of the combined body are emphatically ***,the model applicability is illustrated by the uniaxial and triaxial compression tests on concrete monomer,granite monomer and concretegranite composite samples(CGCSs)with different *** results revealed that the compressive strength of the composite is closer to the concrete with lower strength in the combined body under different confining *** interface roughness causes to raise the compressive strength of the composite due to interfacial adhesion between concrete and granite,and a slowing growth trend is observed in compressive strength as *** model can provide a certain reference for the stability design and evaluation of engineering rock mass.