典型文献
Frictional behavior of planar and rough granite fractures subjected to normal load oscillations of different amplitudes
文献摘要：
The dynamic frictional behaviors of natural discontinuities(joints,fractures,faults)play an important role in geohazards assessment;however,the mechanisms of the dynamic fault weakening/strengthening are still unclear.In this paper,a dynamic shear box was used to perform direct shear tests on saw-cut(planar)and natural(rough)granite fractures,with different normal load oscillation amplitudes.Based on the recorded shear forces and normal displacements,the shear forces,apparent friction coefficients and normal displacements are found to change periodically with oscillated normal loads and are char-acterized by a series of time shifts.The observed changing patterns are similar for the rough and planar fractures.Compared with the test data under constant normal load(CNL),small/large normal load oscillation amplitude enhances/reduces the peak shear strength,with a critical point.The magnitude of critical normal load oscillation for the rough fractures is smaller than the planer fractures.The results imply that dynamic fault weakening/strengthening can be achieved by both normal load oscillation amplitudes and slip surface topography.The rough fractures with larger normal oscillation amplitude can easily cause frictional weakening under stress disturbance.
文献关键词：
中图分类号：
作者姓名：
Wengang Dang;Kang Tao;Xinfan Chen
作者机构：
School of Civil Engineering,Sun Yat-sen University,Zhuhai,519082,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou,221116,China;Southern Marine Science and Engineering Guangdong Laboratory,Zhuhai,519082,China
文献出处：
引用格式：
[1]Wengang Dang;Kang Tao;Xinfan Chen-.Frictional behavior of planar and rough granite fractures subjected to normal load oscillations of different amplitudes)[J].岩石力学与岩土工程学报（英文版）,2022(03):746-756
A类：
planer
B类：
Frictional,planar,rough,granite,fractures,subjected,normal,oscillations,different,amplitudes,dynamic,frictional,behaviors,natural,discontinuities,joints,faults,play,important,role,geohazards,assessment,however,mechanisms,weakening,strengthening,still,unclear,In,this,paper,shear,box,was,used,perform,direct,tests,saw,cut,Based,recorded,forces,displacements,apparent,coefficients,found,change,periodically,oscillated,loads,char,acterized,by,series,shifts,observed,changing,patterns,similar,Compared,data,under,constant,CNL,enhances,reduces,peak,critical,point,magnitude,smaller,than,results,imply,that,can,achieved,both,slip,surface,topography,larger,easily,cause,stress,disturbance
AB值：
0.492583
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