3DEC-培训

UDEC/3DECShortCourseItascaSoftwareTrainingCourseTongjiUniversityShanghai,ChinaOctober27-31,2008PeterCundall,YanhuiHan&RogerHartItascaConsultingGroup,Inc.TrainingScheduleOctober29,2008(morning)09:00-10:153DECGraphicalInterface-Thenewgraphicalinterfaceforcreatingandmanipulating3DECoutput10:15-10:30Break10:30-12:00UDEC/3DECApplication-Modelgenerationincludingjointstructurecreation-Simpleexercises3DEC4.10GraphicsCapabilities3DECMainWindowterminalinterfaceplotviewsplotitemandviewcontrolsOverview•ViewArea•Legend•ControlPanel:–Plot-itemList–ViewInfo.–ElementInfo.Overview•LegendAttributes•DisplaySettingAttributes•ControlPanelToggleButtons•MouseModeButtons•PlotOptions3DECFilesProjectFile(*.3dprj)–Theprojectfilecontainsinformationrelatedtoaspecific3DECproject.Thisincludeslinkstothedatafileandsavefilerelatedtotheproject,theplotviewsgeneratedfortheprojectandtheguilayout.DataFile(*.3ddat)–ASCIIfilelisting3DECcommandsthatrepresenttheproblembeinganalyzedSaveFile(*.3dsav)–Binaryfilecontainingvaluesofallstatevariablesanduser-definedconditionsatstagethatfileissavedLogFile(*.log)–ASCIIfilethatrecordstextappearingonthescreenintoalogfileHistoryFile(*.his)–ASCIIfilerecordofinputoroutputhistoryvaluesPlotFile–Graphicsplotfile(invariousstandardformats)MovieFile(*.dcx)–StringofPCXimagesthatcanbeviewedasa“movie”TutorialSlidingWedgemassdensity2000kg/m3bulkmodulus1.0Gpashearmodulus0.3GPanormal&shearjointstiffness13.3MPa/mjointfrictionangle20odip=30odipdirection=270oModelBuildingin3DECTwoapproaches:1)Cutupalargepolygonintothedesiredgeometry2)CreateseparatepolyhedraandconnectthemtogetherModelgenerationcommandstocreateandshapealargepolyhedronPOLYbrickxl,xuyl,yuzl,zuPOLYfacexa1,ya1,za1xa2,ya2,za2...facexb1,yb1,zb1xb2,yb2,zb2.....POLYprismaxa1,ya1,za1xa2,ya2,za2...bxb1,yb1,zb1xb2,yb2,zb2...POLYtunnelkeywords...ModelgenerationcommandstocutupalargepolyhedronJSETkeywords...TUNNELregionn...POLYcubePOLYface&POLYbrickpoly&face0,0,01,0,01,1,00,1,0&face0,0,00,0,11,0,11,0,0&face0,0,00,1,00,1,10,0,1&face1,1,11,1,01,0,01,0,1&face1,1,11,0,10,0,10,1,1&face1,1,10,1,10,1,01,1,0polybrick0,10,10,1POLYprismpolyprisma(0,0,0)(-.5,.87,0)(-.5,1.87,0)(0,2.74,0)&(1,2.74,0)(1.5,1.87,0)(1.5,.87,0)(1,0,0)&b(0,0,4)(-.5,.87,4)(-.5,1.87,4)(0,2.74,4)&(1,2.74,4)(1.5,1.87,4)(1.5,.87,4)(1,0,4)POLYtunnelpolytunnelrad=2leng=-10,10ratr=3.0dip=0dd=0nr=2nt=1nx=3delete-22,-1010-22joinonjoinonFracture/jointrepresentationin3DECFracturesarerepresentedbycutsinblocksCutsmust“knife”completelythroughaparticularblockBlockscanbehiddentoavoidcuttingBlockscanbejoinedatcommonfacestoformconcaveblocksFractureterminationwithinblockisaccountedforbyeither:adjustingrockstiffnessusinghighstrengthfornon-fractureportionofcutJointgenerationcommandsJSETdipv1ddv2originxyzpersistencepnumnspacingsidiHIDE/SEEKJOINon/offDefinitionofjointorientation•3DEC4.1usesleft-handed(CONFIGlhs)orright-handed(CONFIGrhs)coordinatesystems(bydefault,right-handed)•JSETcreatessingleormultiplecuts•HIDEandSEEKcontrolcontinuityofcutsJointplaneStrikelineEast(x)=Dip=DipdirectionNorth(y)Up(z)9003600right-handedsystempolybrick0,10,10,1;createablockjsetdip0dd0or0,.5,0;makeahorizontalcuthidedip0dd0or0,.5,0below;hidethebottomblockjsetdip90dd90or.5,0,0;verticalcutthroughtopblockonlyseek;makeallblocksvisibleJSETpolybrick080-3080050;shallow-dippingfractureplanes(continuous)jsetdip2.45dd235org30012.5jsetdip2.45dd315org35030;highanglefoliationplanes(continuous)jsetdip76dd270spac16num3org30,0,12.5;intersectingdiscontinuities(non-continuous)hiderangex0,80y0,50z0,10hiderangex55,80y0,50z0,50jsetdip70dd200org0350jsetdip60dd330org501550seekhiderangex0,30y-30,80z13,50JSETconfiglhpolybrick-1.5,1.5-1.5,1.5-1.5,1.5tunnelradialregion1&a(-0.30,0.00,-1.5)(-0.3,0.40,-1.5)(-0.25,0.47,-1.5)&(-0.15,0.52,-1.5)(0.0,0.55,-1.5)(0.15,0.52,-1.5)&(0.25,0.47,-1.5)(0.3,0.40,-1.5)(0.30,0.00,-1.5)&b(-0.30,0.00,1.5)(-0.3,0.40,1.5)(-0.25,0.47,1.5)&(-0.15,0.52,1.5)(0.0,0.55,1.5)(0.15,0.52,1.5)&(0.25,0.47,1.5)(0.3,0.40,1.5)(0.30,0.00,1.5)removeregion1TUNNELBoundarylocationsExtremegrids–“tunnel”sizesarethesamestressdisplacementPracticalExercise1:FailureofaJointedRockSlopejointedrockunitweight20,000N/m3dipangle76odipdirection270ospacing4mjointnormal&shearstiffness1.0GPa/mcohesion0frictionangle6oLowanglejoints-dipangle2.5oPracticalExercise2:StabilityAnalysisofanUndergroundExcavationrun3DECjointedrockunitweight20,000N/m3bulkmodulus1.5GPashearmodulus0.6GPathreejointplanes:1.dipangle65odipdirection270oorigin0.3,0.0,0.02.dipangle40odipdirection230oorigin0.0,-0.3,0.03.dipangle50odipdirection320oorigin0.0,0.0,0.3jointnormal&shearstiffness1.0GPa/mjointcohesion0jointfrictionangle6ojointplane1jointplane2jointplane3