Upload
trinhminh
View
247
Download
2
Embed Size (px)
Citation preview
STRICTANDAUTOMATICMAPPINGOFIFC-BIMMODELSINTOSEMANTICALLYENRICHED3DCITYGML BUILDING
MODELS(EXTERIORANDINTERIOR)1STINTERNATIONALIAGWORKSHOPONBIMANDGISINTEGRATION
25OCTOBER2017
RudiStouffs
A:VIRTUAL SINGAPORE CITYGML MODEL
• VirtualSingaporeisadynamic3Dcitymodelandcollaborativedataplatform.ThemodelandplatformwillbeunveiledduringtheWorldCitiesSummitinJuly2018.
Challenge1: Ensuretheresearchisdrivenbyuserneeds
A’:POTENTIAL USE CASES
• Housing&DevelopmentBoard(CentreofBuildingResearch)− energy− urbangreening− livingenvironment− waste&water− buildingtechnology
• UrbanRedevelopmentAuthority− housing− transport− economy− recreation− identity− publicspace
• SingaporeLandAuthority− 3Dcadastre&strata− planning− operations− riskmanagement
A’:POTENTIAL USE CASES
• Simulations− thermalcomfort(coolwalls)− energyconsumption(commonlighting,elevators)
− safeguardingwindcorridors− limitingnoise− solarphotovoltaics− greening− rainwaterharvestingandrecycling− urbanmobility
Challenge1: Ensuretheresearchisdrivenbyuserneeds
• Codecompliance− privacy− view
• Visualisation− operations(e.g.,refusedisposal)
B:NATIVE BIMBUILDING MODELS
• Singapore’sBuildingandConstructionAuthority(BCA)willmandatee-submissionsinnativeBIMformatfornewdevelopmentswithGFAmorethan5,000m2.NativeBIMe-submissionsmustbepreparedinaccordancewiththeprevailingCoP.
Challenge2:Workwithreal-worldnativeBIMmodels
Types Voluntary MandatoryArchitecture 19October2016 Secondhalfof2017C&SEngineering 1October2017 Secondhalfof2018MEPEngineering 1October2017 Secondhalfof2018
C:IFC4
• IFC4Addendum2publishedon15th July2016
• SelectionofIFC4asstate-of-the-artIFCstandard− nativeBIMmodelsasinput− focusonarchitecturalbuildingdata– includingfoundation(piling)
Challenge3: Demonstratetheconversionofmoreinformationthanhasbeenpreviouslyachieved– toenableautomaticcreationofsemanticallyenricheddatamodels
D:CITYGML V3.0
• CityGML v3.0isanongoingdevelopment− CoreModel− LevelofDetail(LOD)concept− improvedinteroperabilitywithotherrelevantstandards(IndoorGML,IFC,LADM)
• ApplicationDomainExtension(ADE)− GeoBIM (IFC)ADEforintegratingsemanticIFCdatainCityGML isinsufficientforourpurpose
Challenge4: TransitionfromCityGML v2.0toCityGML v3.0atsometimeduringtheproject
1:FROM NATIVE BIMTO IFC4
• Modelconsistency− noinitialweedingofunfavourableBIMmodels– aimtodetermineworkaroundsformodellinginconsistencies
− useofandtweakingofexistingexportfacilities toensureinclusionofallrequiredinformation
• Modelchecking− canaModelViewDefinition (MVD)beusedtoensureconsistency?
• Modelguidelines− suggestionsforamendmentstoBIMe-submissionCodeofPractice,basedonenhancedpracticalunderstandingofBIM-IFC-CityGML interoperabilitylevels
2A:FROM IFCTO CITYGML – SCOPE
• Startingpoints− IFC4− buildings– architecturalinformation(includingfoundation)− CityGML LOD3− exteriorandinterior(LOD4)
• Specificationrange− min:conversionofgeometricmodelcontent− max:completeandlossless− usecasesbased− configurable?
2B:FROM IFC TO CITYGML
• Kernel• Corelayer
− productextension
• Interoplayer− sharedbldg elements(wall,column,slab,stairetc.)
• Domainlayer− architecturedomain(windowsanddoors)− structuralelements(pilesandfootings)
• Resourcelayer− tobederivedfromcoreanddomainlayerwhatisneededtosupport
Imageadaptedfrom“IndustryFoundationClassesVersion4- Addendum2”,buildingSMART InternationalLimited.
2B:FROM IFC TO CITYGML
• Conversionofgeometriccontent− SweptSolid,Brep,CSG,…
• Typepropagationfrombuilding elementstosurfaces− walls,roofs,slabs,columns,beams,doors,windows
• Conceptualobjectssupportinginformationalusecases− spaces(physicalandlogical)
• Semanticrelationssupportingsimulationusecases− windowinawall,…− relationshipbetweenspacesandboundaries(CityGML v3.0)
• Relevantpropertiestosupportusecases− materialproperties:shader,reflectivity,transmittance,roughness− intendedusageofspaces− …
PROJECT DETAILS
• Projectduration:May2017– April2019
• Funding:NRF2015VSG-AA3DCM001-008NRFandGovTech
• Researchcollaboration:OSI
• Collaboratoringagencies:HDB,BCA,URA
• Collaboratingvendors:Bentley,Graphisoft,Trimble,Autodesk
RESEARCH TEAM
• Principalinvestigators:− RudiStouffs(NUS– Dept.ofArchitecture)
− PatrickJanssen(co-PI)(NUS– Dept.ofArchitecture)
• Researchfellows:− HelgaTauscher(NUS)− FilipBiljecki (NUS)− JamesCrawford(OSI)
• Researchassistants:− ChenKok Kiong− AmolKonde