quakecore opensees monthly webconference 17 august 2016

QuakeCoRE OpenSees Monthly Webconference

17 August 2016

Monthly Webconferences Objec&ves/Purpose:•  ProvideaplacewhereresearcherscansharetheOpenSees-relatedworktheyaredoingwiththeQuakeCoREresearchcommunity

•  Provideamediumthroughwhichtoholdpresenta>onsaboutOpenSeestopicsofinterest,andto

•  Generallyfacilitatecollabora>onandsharingbetweenstudentsandfacultyworkingwithOpenSees

TypicalAgenda(willvaryabitweek-to-week):

•  UpdatesonongoingQuakeCoREOpenSeesdevelopment

•  Studentpresenta>onsonpast/current/futureOpenSeesresearch(shorter)•  SeminarsonOpenSeestopicsofgeneralinterest(longer)

•  Communityques>ons/discussionsessions

QuakeCoRE and OpenSees QuakeCoREisana>onalnetworkofleadingNewZealandearthquakeresilienceresearchersintendedto:

•  Leveragestrengthsacrossthecountryandinterna>onally•  Facilitatecollabora>veintegratedmul>disciplinaryresearchthatwillsupportthedevelopmentofanearthquake-resilientNZ

FlagshipPrograms:

•  FP1:GroundMo>onSimula>on&Valida>on•  FP2:Liquefac>onImpactsonInfrastructure

•  FP3:Heritage,Safety&Economics:AddressingEarthquake-ProneBuildings

•  FP4:Next-Genera>onInfrastructure•  FP5:PathwaysToResilience•  FP6:Spa>allyDistributedInfrastructure



TechnologyPla]orms:

•  TP1:ExperimentalLaboratoryFacili>es•  TP2:FieldTes>ng&Monitoring

•  TP3:Open-sourceCommunityDatasets

•  TP4:Computa>onalSimula>onandDataVisualiza>on



TechnologyPla]orm4:

•  Groundmo>onsimula>on•  Seismicresponsemodellingofinfrastructure

•  Seismicperformanceandlossassessment



RoleofQuakeCoREwithOpenSees:

•  Op>mizeimplementa>onofOpenSeesonNeSIHPCresources•  Developmentofpre/post-processingtoolstostreamlineu>liza>onofOpenSeesbyQuakeCoREresearchers

•  Meshgenera>ontools•  ’Codeblocks’forcommonortypicalsimula>ontypes•  Post-processingtools•  Resultsvisualiza>on

Workshop Survey Results Summary–WhocomprisestheQuakeCoREOpenSeesresearchcommunity?

•  Largelycomposed(80%)ofuserswithlieleornoexperiencewithOpenSees

•  Predominantlystructuralanalysis

•  Thecomputa>onalscopeofmostoftheworkismoderatelydemanding,withparametricstudiescomprisingthemainsourceofcomputa>onaldemand

•  Noconsensuspre/post-processingtoolsorstrategiesinusethroughoutthecommunity–moreofamixofdifferentthings

•  Desireforimprovement/assistancenearlyequallyineachof:•  Pre-processing•  Analysistools•  Post-processing•  Visualiza>on

Community Input

Community Input

PrimaryAnalysis/Simula&onType

Structural Soil-StructureInterac>on Geotechnical

Largesinglemodel(orlimitedparam.study)

BilelRagued,UAPhD,2Dsite-response/SSIstudyofLyeeltonportwharfstructure(includesparamstudyaspects)

SeokhoJeong,UCPostdoc,2D/3DsiteresponseanalysisatHeathcoteValley

Simplermodel(s),withlargeparametricstudy

JarrodCook,UCPhD,Tension-onlybracew/ratche>ngReaganChandramohan,StanfordPhDsoonUCPostdoc,verylargeparameterstudyforstructuralsystems(considersperformanceandlossassessment)MasoudMoghaddasi,UC/UAPostdoc,largeparameterstudyfortypicalNZstructuralsystemstoassessperformanceandlossregion-specifically

TBD,UAPhD,2DSSImodelsassessingeffectsofgroundimprovementonmo>onstransferredtostructureTBD,UAPhD,dynamicbridgeanalysiswithSSIsprings

KevinFoster,UCPhD,site-responseanalysisusingKiK-netdownholedataHannahDawson,UAPhD,site-responseanalysisforrangeofprofilesinAucklandarea(fitsbtwncurrentandabovecells)

Performanceorlossassessment

KarimTarbali,UCPhD,assessingdemandandperformanceofSDOF/MDOFsubjecttodirec>vitymo>ons

Weknowabitfromthesurveysandthroughdiscussionsassociatedwiththetrainingworkshopsearlierthisyear,butwheredowespecificallystandasaresearchcommunity?

•  Name–Loca>on/School–Topic

Community Input

GoalsforAnalysis/Simula&on

Now 6months 18months

JarrodCook HavebeenmodelingthingsinMATLAB,juststar>ngtotransi>ontoOpenSees

HaveparameterstudyupandrunninginOpenSees,workingonincreasingmodelcomplexity

Poten>alforlarger,morecomplex,modeltorecreateshaketabletes>ngthatmaybedone

KevinFoster Notstartedyet,inplanningstages HaveparameterstudyupandrunninginOpenSees

Considera>onofbi-direc>onalshakingincontextofsoilcolumn

KarimTarbali FinishedwithanalysisforPhD MayapplyconceptsfromresearchonSDOF/MDOFtootherengineeringsystems(e.g.geotechnical,SSI)

SeokhoJeong 1D/2DsiteresponseanalysisofHeathcoteValleyconsideringhorizontalinputmo>ons

ExaminesoilresponseinHeathcoteValleytover>calinputmo>ons

Topographicamplifica>onstudyforPortHills,mayconsider2DOpenSeesstudies

HannahDawson Star>ngmodelingsoon,currentlydefiningsoilprofilesfromVsdata

Havesite-responsemodelingeffortwellunderway

HopefullyfinishedwithmodelingandwrappingupPhD

BilelRagued Finishingverysoon

ReaganChandramohan FinishingPhDresearch(Stanford) ExtendframeworkfromPhDtoothersystems(e.g.geotech,SSI),startbecominganOpenSeesdeveloper

MasoudMoghaddasi RunningparameterstudytoassesseffectofGMuncertaintyonstructuralresponse

StartconsideringMonteCarlosimula>onstoaccountforuncertain>esinthestructureitself

Whatareyouraspira>onsbasedonwhatisachievableinyouranalysis?•  Whereareyoucurrentlyandwheredoyouwanttobe?•  Whatassistancemayyouneedinordertoachievethesegoals?

Initial Workflow Tasks Identified for Support

Ini@al Tasks Basedonthecommunitydiscussionfromlastmonth’smee>ngandtheoverallvisionforOpenSeesdevelopmentthroughQuakeCoRE,thefollowingareashavebeeniden>fiedastheini>altasks:•  Pre-processandpost-processingtoolsfor1Dsiteresponseanalysis•  Workflowop>miza>onforparallelanalysisofverylargemodels(OpenSeesSP)

Ini>alfocuswillemphasizepost-processingandworkflowtasks.

•  APythoninterpreterforOpenSeesissettobemadeavailableatsomepoint.•  PythonhasbeenintegrallyincorporatedintootheraspectsofTechPla]orm4(par>cularlyGMsimula>onworkflow),thereforeitisthepreferredlanguageforusewithOpenSeesonceavailable

•  Nosenseinspendingsignificant>me/effortontclscriptsifstrategicvisionistomovetoPythonwhenready

1D Site Response Analysis •  Generalmodelingapproach–columnofplanestrainquadrilateralelements

•  TotalStress:•  quad,SSPquad,bbarQuad,…•  Effec>veStress:•  quadUP,SSPquadUP,9_4_QuadUP

1D Site Response Analysis

1D Site Response Analysis •  Post-processing:whatinforma>ondowewanttogetoutofthismodel?

GM

Nodalquan>>es:•  Acc/vel/disp>mehistoryatsurfaceordepth•  Acc/vel/disp/porepressureprofilesin>me•  Maximumacc/vel/disp/porepressureprofiles

Elementalquan>>es:•  Shearstress/strainprofilesin>me•  Maximumshearstress/strainprofiles•  Shearstress/strainhistoriesatdepth•  Ver>cal/horizontalstressprofiles/histories

Mixedquan>>es:•  Timehistories,profilesin>me,andmaximum

profilesofporepressurera>o

1D Site Response Analysis •  Post-processing:howwouldweliketopresentthisinforma>on?

Accelera>onatsurface surfaceresponsespectra


Cons>tu>ve(shearstress-strain)responseatdifferentdepthswithinthesoilprofile


Maximumprofilesandprofile>mehistories

Parallel OpenSees Workflows Workflowop>miza>onforparallelanalysisofverylargemodels(OpenSeesSP):•  Twoop>onsforparallelanalysisusingOpenSees

•  OpenSeesSP–singleinterpreteràverylargemodels(manyDOF)•  OpenSeesMP–mul>pleinterpreteràparameterstudies(andverylargemodelswithmanualdomaindecomposi>on)

•  Currently,itappearsthatOpenSeesSPdoesnotscalepar>cularlywellforthetypesofproblemsthathavebeenanalyzedwiththisparalleltool.Why?

•  Inefficientcommunica>onbetweenprocesses•  Masterprocess(wheresingleinterpreterinrunning)isoverloaded•  Op>malsizeofdecomposi>onhasbeenreached•  Toomuchcommunica>onduetochoiceofimplicitintegrator

•  Workisunderwaytoinves>gatethesehypothesesusingOpenSeesSPasimplementedontheUniversityofAucklandPancluster.

Thank you!

www.quakecore.nz

quakecore opensees monthly webconference 17 august 2016

Documents