《Particle flow study on strength and meso-mechanism of Brazilian splitting test for jointed rock mass》.pdf
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《Particle flow study on strength and meso-mechanism of Brazilian splitting test for jointed rock mass》.pdf
ActaMechanicaSinica(2014)30(4):547—558
DOI10.1007/s10409—014—0076一z
RESEARCH PAPER
Particleflow studyonstrengthandmeso.mechanism ofBrazilian
splittingtestforjointedrockmass
Sheng-QiYang·Yan-HuaHuang
Received:2April2014/Revised:8May2014|Accepted:12June2014
~TheChineseSocietyofTheoreticalandAppliedMechanicsandSpringer—VerlagBerlinHeidelberg2014
Abstract A discreteelementmethod(DEM)calledpar— iantest.(4)Thenotchangleandjointangleplayimportant
ticleflow code(PFC )wasusedtoconstructamode1for rolesoncrackinitiationandpropagationcharacteristicsof
Braziliandiscsplittingtestinthepresentstudy.Basedon jointedrockmassdiscspecimencontainingacentralstraight
theexperimentalresultsofintactBraziliandiscofrock—like notchunderBraziliantest.
materia1.asetofmicro.parametersinPFC thatreflected
themacro—mechanicalbehaviorofrock—likematerialswere Keywords Jointedrockmass-Braziliansplittingtest·Ten—
obtained.AndthenPFCz wasusedtosimulateBrazilian silestrength ·Failuremode.PFC 。
splittingtestforiointedrockmassspecimensandspecimen
containingacentralstraightnotch.Thee髓 ctofointan— 1 Introduction
gleandnotchangleonthetensilestrengthandfailuremode
Thetensilestrength isan importantmaterialpraameterjn
ofiointedrockspecimenswasdetailedanalyzed.Inorder
rockmechanicsthatdescribesthelimitedstressunderten—
torevealthemeso..mechanicalmechanism ofcrackcoales..
sion,becauserock materialsraemuchweakerin tension
cence.displacementtrend1ineswereappliedtoanalyzethe
than incompression.Brazilian splittingtestunderdiam
displacementevolutionduringthecrackinitiationandprop—
etercompressionhasbeenoneofthemainindirectmeth—
agation.Theinvestigatedconclusionscanbedescribedas
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