典型文献
Failure strength and fracture characteristics of rock with discontinuity under indirect tension
文献摘要：
Large-scale discontinuities can significantly affect the mechanical properties of rock masses.However,the tensile behavior of rock discontinuities is often less investigated.To study the statistical character-istics of failure strength and fracture characteristics of rock discontinuities,Brazilian disc tests were conducted on limestone specimens with a single natural discontinuity at different load-discontinuity angles(β).In this study,β=0° and β=90° correspond to the discontinuity parallel and perpendic-ular to loading direction,respectively.The results show that Brazilian failure strength(BFS)can reasonably represent the tensile strength of rock with discontinuities,by comparing the BFS and tensile stress in the disc center at peak force.The two-parameter Weibull distribution can capture the statistical BFS characteristics of rock discontinuities parallel to loading direction(β=0°)and at different load-discontinuity angles(β≠0°).All specimens with discontinuity at different load-discontinuity angles show more plastic deformational behaviour than intact rock specimen.With increasing f3,the mean BFS of limestone with discontinuity increases before reaching a plateau at,β=45°.The single plane of weakness theory best explains the BFS of fractured limestone with β.Only a specific segment of pre-existing rock discontinuity could affect the fracture process.When β=0°,interfacial cracks and alternative cracks formed.When β≠0°,mixed failure mode with shear and tensile failure occurred,particularly when β=30° and β=60°.The findings can contribute to better understanding the failure and fracture characteristics of rock with discontinuities,particularly the interaction of pre-existing dis-continuities with stress-induced fracturing.
文献关键词：
中图分类号：
作者姓名：
Dongya Han;Jianbo Zhu;Yat-Fai Leung
作者机构：
School of Resources and Safety Engineering,Central South University,Changsha,China;Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong,China;Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization,Institute of Deep Earth Sciences and Green Energy,College of Civil and Transportation Engineering,Shenzhen University,Shenzhen,China
文献出处：
引用格式：
[1]Dongya Han;Jianbo Zhu;Yat-Fai Leung-.Failure strength and fracture characteristics of rock with discontinuity under indirect tension)[J].岩石力学与岩土工程学报（英文版）,2022(06):1810-1822
A类：
perpendic,continuities
B类：
Failure,strength,characteristics,rock,discontinuity,indirect,tension,Large,scale,discontinuities,significantly,affect,mechanical,properties,masses,However,tensile,behavior,often,less,investigated,To,study,statistical,failure,Brazilian,tests,were,conducted,limestone,specimens,single,natural,different,angles,In,this,correspond,parallel,loading,direction,respectively,results,show,that,BFS,reasonably,represent,by,comparing,stress,center,peak,force,two,parameter,Weibull,distribution,capture,All,more,plastic,deformational,behaviour,than,intact,With,increasing,f3,mean,increases,before,reaching,plateau,plane,weakness,theory,best,explains,fractured,Only,specific,segment,existing,could,process,When,interfacial,cracks,alternative,formed,mixed,mode,shear,occurred,particularly,when,findings,contribute,better,understanding,interaction,induced,fracturing
AB值：
0.456416
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