STUDY ON BUILDING INFORMATION MODELING AND IMPLEMENTATION OF CLASH DETECTION TOOL IN BUILDING DESIGN

International Research Journal of Engineering and Technology (IRJET)

Volume: 09 Issue: 04 | Apr 2022 www.irjet.net

e ISSN: 2395 0056

p ISSN: 2395 0072

STUDY ON BUILDING INFORMATION MODELING AND IMPLEMENTATION OF CLASH DETECTION TOOL IN BUILDING DESIGN

Yugandhara R Khasbage 1 , Swati Kshirsagar 2

1 Pursuing ME Construction Management, RMD SSOE , Warje , Pune 411058, Maharashtra, India

2 Asst. Professor, Dept. of Civil Engineering, RMD SSOE, Warje , Pune 411058, Maharashtra, India

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Abstract

Building Information Modeling (BIM) is recently becoming popular and a extremely economical resolution for information management in Architecture, Engineering and Construction (AEC) industry. In Indian construction state of affairs most of the projects are still using 2D CAD drawing for his or her execution purpose. These 2D CAD drawings have lot of issues during execution like miscommunication, misunderstanding and time consuming process etc., This sort of errors and cost is reduced while using this BIM process Clash detection tool is an applicationofBIMwhichisemployed for the coordination of building systems within 3D building models. This report gives a short introduction about Clash detection in BIM and it focus the methodology involved conducting clashdetectionanalysisusingbuildinginformation modeling. This work involves searching for, how this clash detection tool helps to optimize of clashes in construction of particular building using BIM Coordination.Themethodology involved in this report will be study of a G+3 residential building which consist of an architectural, structural and Mechanical, Electrical and Plumbing (MEP) BIM models and their subsequent clash detection analysis is done in this study, commercial software like as Autodesk Revit 2021, Autodesk Navisworks Manage 2022 are used. It also focuses on the methods of simplifying and standardizing the methodofClash Detection using Autodesk Navisworks. The entire cost of the project won't be increased and completion of the project on time and avoids overruns of budget.

Key Words: BIM, Clash detection, Navisworks ,Revit etc

1. INTRODUCTION

Building Information Modeling (BIM) is process that supports virtual design and construction methodologies puttingallplatoonmemberstogetherthroughouttheentire design and construction process and beyond to the operations in conservation of the structure, during its working life. Generally, BIM is one holistic process using real time,intellectualmodelingsoftwareeffectivelyworking in3D,4D(3Dtime),and5D (4D cost),D(5Dinstallations operation)toameliorateproductivity,tosaveplutocratand timeinthedesignandconstructionphases,andtoreduce operatingcostsafterconstruction.Clashresolutionisoneof the tool helps to optimize the time and cost of the

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construction. The National BuildingInformationModeling Norms(NBIMS)commissionofUSdefinesBIMas,“a digital representationofphysicalandfunctionalcharacteristicsof installation. BIM is a participated knowledge resource for information about a installation forming is liable base for opinionsduringitslifecyclei.e.fromforemostgeneralityto obliteration. A introductory premise of BIM is the collaborationbydifferentstakeholdersatdifferentphasesof thelifecycleofainstallationtofitexcerpt,updateormodify informationinBIMto supportandreflecttheplacesofthat stakeholder”.

1.1 AIM

The aim of the study is to identify barriers to strategic implementation Of Building Information Modeling (BIM) withinconstructionindustry& Minimizationofconstruction wastethroughBIMbasedclashdetectiontool.

OBJECTIVE

1)Toexploretheprocessof BuildingInformation Modelling.

2)ToCreate andintegrateprojectdelivery(IPD)system usingBIM.ThatunifiesDifferentDisciplines(Architecture, Structure&MEPF)

3)ToUseNavisworksforClashDetection.

1.2 SCOPE OF WORK

Inthisproject,AG+3ResidentialmodelofAlamedaPoint Block 9, Atlantic Ave Alameda, California 3D model is modelled.Building architecturehadbeencreatedbyRevit Architecturesoftware.Structuraldetailsofthisbuildinghad been created by Revit Structure software and MEPF (Mechanical,ElectricalPlumbing&Fire)serviceshadbeen created by Revit MEPF software. The Architectural, structural and services models were imported into Navisworkssoftwaretoidentifytheclashesamongvarious disciplines.Theclasheswereidentified.

Themainobjectivesofthisthesisistotestandvalidatethe integrity and correctness of the created 3D parametric modelbyexportingBIMcontentinaformatthatmaintains the integrity of the created objects in the 3D parametric model,notonlyfromageometricpointofviewbutalsofrom

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adataandinformationpointofview,afterwhichtocarryout an analysis to identify the conflicts between the different disciplines taken into consideration, in this case the architectural,structuralandthemepfone.Inordertoobtain a consistent and as complete as possible data integrity, it was necessary to establish from the early stages of the projectwhichtypesofparameterswereneeded.

2. WHAT IS BIM?

BuildingInformationModeling(BIM)istheholisticprocess ofcreatingandmanaginginformationforabuildingproject. BasedondigitalmodelandcreatedbyaBIMplatform,BIM integratesstructured,multi disciplinarydatatoproducea digitalrepresentationofaprojectthroughitslifecycle,from planning and design to construction, operating and maintenance.

“BIM simulates the construction project in a virtual environment. With BIM technology, an accurate virtual modelofabuilding,knownasabuildinginformationmodel, is digitally constructed. When completed, the building informationmodelcontainsprecisegeometryandrelevant dataneededtosupportthedesign,procurement,fabrication, andconstructionactivitiesrequiredtorealizethebuilding”

AdoptingBIMmethodologybenefitstoagreatdegreeallthe parties concerned with the project, starting with the different designing teams as it enhance the collaboration between them, minimizing the errors that results if each teamworkedseparatelywithoutsharinginformationabout their work, it also helps to have a fast and correct design process as the checking process will be in all disciplines combinedinonemodelsoconflictscanbedetectedbefore construction starts. For the owners with complete BIM model,itiseasiertooperateandapplymaintenancetothe project.

3. CLASH DETECTION

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Fig 1:ProjectmanagementwiththeBIMmethodology

[source:https://BIMmda.com/en/what is BIM]

Clash detection remains the primary requirement of any multidisciplinaryprojectwhereincompositedesignneedsto beinspectedfortheidentificationofclashes.ClashDetection is the method of inspecting and identifying the various interferences which frequently occurs in coordinating processof3Dmodelscreatedindifferentmodernsoftware’s like Revit Architectural, Revit Structural & Revit MEP .In BIM,3DmodelsfordifferenttypessuchlikeStructural,Civil, and Architectural &MEP(Mechanical, Electrical and Plumbing).Whencombinationofallthesedifferenttypesof modelstocreateacompleteBIMmodeltherewillbechances ofclashbetweentheseelements .Inclashdetectiontestit detectstheconflictsbetweendifferentelementswithin3D Building Information Model before actually construction starts,andthereforetimeoptimizationintheconstruction schedule, reduce costs and change orders. By using clash detection application in AEC industry increase the productivityofdesignandconstructionproject.

3.1 Need of Clash Detection

Intraditionalmethodorganizationspreparesactivitiesfor the execution stage as establishing contracts with contractors,buyingmaterials,ensuringagoodcoordination andassemblyorderofthedifferentsystemsofaproject.The mostclashesarerecognized whenthecontractorreceives thedesigndrawingsandeveryoneison siteandworking.It is compare with 2D designs to each other to find conflict clashesbetweenthespecialtydesigns.Becausethespecialty contributors i.e. structural engineers, MEP engineers etc. developtheirdesignsseparately,sowhencomparingthese designson differentdrawingsisa process easilyoverlook clashes.Thecontractorsrequireseeingthatthedetailingof structural elements, plumbing, electrical lines and other componentisdonewell.Ifthereissomemistakeinofthese clashes result change orders then these effects on cause delay in project, design modifications, materials costs and budget overruns. Using BIM and the Clash Detection applicationenablespotentialproblemstobeidentifiedearly inthedesignphaseandresolvedbeforeconstructionbegins withmoreeffective

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4 METHODOLOGY

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The following flowchart explains the methodology of this report.

Chart 1 Methodology

4.1 Model creation

4.1.1-Data Collection

TheplanofaG+3residentialapartment,whichisaproposed projectinAlamedaCAofAlamedapointblock9Abuilding,is takenforstudy.CADfileofextension“.dwg”isbeenusedfor alldisciplinesbeforestartingthemodeling.

Figure 2showsCADdrawingoftheFiresystemof BlockA

InAutodeskRevit,RevitArchitecture,RevitStructureand RevitMEPF(Mechanical,Electrical Plumbing&Fire)areto becreatedseparately indifferentrevitfiles.

Thetemplatesfordifferentdisciplinesshouldbeusedand properlevelsandco ordinatesofprojectshouldbeset,itis veryimportantforcoordinatingmodel atsameplace and finallyitistobecoordinatedwitheachotherbylinkingall modelstogetheraslinkingprocessexplainedinpointno3.4

Each discipline have separate template file for making model.

Revit architecture 3Dis represented in figure 3. Revit Structure3Dviewisshowninfigure4.AndRevitMEP3D viewandCoordinationimageareshowninfigure5,6&7

Fig. 3 RevitArchitecture3Dmodel

Fig 2:AutoCADdwgscreenshot

4.1.2 Autodesk Revit

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Therearelotofsoftware’savailableforcreating3Dmodel, butAutodeskRevitwhichisthebestsoftwareinthisareais usedhere.

In this project Revit software 2021 version is used for creatingthe3Dfile.

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Fig. 5 Revitplumbingmodel

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5-BIM MODEL CHECKING

5.1 Model checking

BIM is based on data exchange between the different involvedactorsduringalltheprojectphases,thereforeitis of significant importance to verify these data in order to guaranteereliableresultsinthenextphasessuchasanalysis, operatingandmaintenance.Thecheckingprocessincludes allthedifferentdataimplementedinthedigitalmodeleither geometricalornongeometricalinformationbytestingthe BIMmodelthoroughvalidationdomains.

There are three main phases to carry out model checkingprocess,eachoneisconcernedaboutspecifictype ofmodeltesting,Figure 8showsthesethreephases.

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Thereareseveralplatformsandtoolstodosuchimportant phasesofBIMsuchas:

•usBIM.Checker

•SolibriModelChecker

•AutodeskNaviswork

6- CLASH ANALYSIS

Nineseparateclashtestswereconducted:

1)ArchitecturalModelversusStructuralModel(ARVs ST),

2)ArchitecturalModelversusMechanicalModel,(AR VsHAVC)

3)ArchitecturalModelversusplumbingModel,(ARVs PHE)

4)ArchitecturalModelversusElectricalModel,(ARVs EE)

5)ArchitecturalModelversusFireModel,(ARVsFF)

6)Structural ModelversusMechanicalModel,(ARVs HAVC)

7) Structural Model versus plumbing Model, (AR Vs PHE)

8)StructuralModelversusElectricalModel,(ARVsEE)

9)StructuralModelversusFireModel,(ARVsFF)

The software was set to detect only hard clashes, with a tolerance of 0.05 mm. There are many BIM software available in market which is useful for design and constructionprofessionalstoincreasetheproductivityofthe project,butinthisstudysoftwareusedforclashdetection process is Autodesk Navisworks Manage 2022. Autodesk NavisworksManagegreateststrengthisclashdetection.Due to this software detecting collisions during design, in real time,givestheBIMstakeholderaveryefficientmethodto improvecoordinationamongmultiplebuildingsystemsand ultimatelyavoidcostlyremediesafterdrawingcompletion andduringConstructionphase.Followingarethestepsfor clashdetectionprocess.

1 The first step to run clash analysis in Navisworks is to openthemodelswhichwewanttocheckconflictsbetween them, to do that from Home tab in Navisworks we can choose Append and then choose the required models as showninFigure9.

2 Architectural StructuralandMEPFmodelswereopened after exporting each one of them form Revit as NWC files, Figure 10 shows them in navisworks after merging them together.

3 To run the clash analysis, it is easy to click on Clash DetectiveiconwhichcanbefoundinHomeribbonasshown inFigure11

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Inthebottomofthewindowthereisthezoneofclashtest settings where we can define the rules of the test such as type and tolerance. It was chosen to run test between Architectural StructuralmodelandMechanicalmodelofthe undergroundparkingzone.Itwaschosentorunhardclash testwithtoleranceequalsto0.05masshowninFigure12

4 After that Clash Detective window open where we can clickonAddTest,thengiveitanameandchosethemodels wewanttorunthetestbetweenthem.

5 Aftersettingthecriteriaforthetestandthenclickingon RunTest,thesoftwaretakessomesecondsandthenshows theresultsofthetest,foreachdetectedclash,thesoftware showssomeinformationaboutitintermsoflevel,grid,date and what are the elements which have the clash between eachotherasshowninreportwhichshowselementsIDs.

Thesoftwarealsogivesthepossibilitytohighlighttheclash inthemodel,itgivestwodistinctcolors(greenandred)for theclashedelements,inthiswayitiseasiertovisualizeand toknowthepositionoftheclashinthemodelandthetypeof elementsthathasintersectionbetweeneachother,asshown infig 13

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6 AftertheclashesbetweenelementofArchitecturalModel versusStructuralModel,ArchitecturalModelversusMEPF Model & Structural Model versus MEPF being easily recognized.ResultinspectionisdoneusingResultstab.

7 AutodeskNavisworksautomaticallygivesastatustoeach clashforfutureuse.TheClashDetectivetoolthatkeepson updatingthestatus oftheclashesaftertheyare identified andarelistedwithinResultstabwhichisshownfigure14

8 Further, for creating report of clash test Report tab is made click on and report created in „.HTML‟ file format whichisshowninfig15

Fig 18 : Resolvingclashbetweenpipe&beamby changinglengthofpipe

In this project totally around 3826 clashes are detectedinclashtestfromalldisciplines.Andalltheclashes areresolvedusingelementIDexportedinclashreport.The clashweassignedisvisibleinAutodeskRevit,onceweopen itandpastetheelementIDinSelectbyID‟tabinRevit.Each clashcanbeselectedtoknowthelocationofitandseparate labeling can be done too. From Revit Architecture the rectifiedfileisexportedin.nwf‟format.Oncethechanges are done the file Navisworks is opened again to check for clashes. The clash report can be exported as text file or HTMLfile

9 ClashescanberesolvedusingclashreportelementIDby changingpositionofparticularelementi.e.figures4.8,4.9& 4.10showstheclashcanberesolvedbychangingthelength ofpipe.

7 RESULTS & DISCUSSIONS

In this study while conducting clash detection test, nine variousdisciplineswerecomparedwitheachother.Thefinal result of clash test reports for Architectural Model versus Structural Model are 463 clashes, Architectural Model versusMechanicalModel1117,ArchitecturalModelversus plumbingModel383,ArchitecturalModelversusElectrical Model 9, Architectural Model versus Fire Model 436, Structural ModelversusMechanicalModel971,Structural Modelversusplumbing235Model, StructuralModelversus FireModel212&StructuralModelversusElectrical0.Each clashwasseparatedbycategoryandresolvedusingelement ID of that clashing members. The element ID was copied from the clash report and that ID pasted into the Revit to locate the clashing elements. Finally it is resolved by changingtheelement.

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Chart 2 Clash test results

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Autodesk Navisworks makes theclashdetectionmannerfasterandeasiertogether withabsolutelyloweringthe scope of humanerrorsduringits execution.designclashes thatariseamongconstructingfactorsaresuccessfullyidentif iedviaNavisworks andthey'rewell timedsolved.as a resultwholeeliminationoflayouterrors, optimize time andpricemay be veryimportantfor AECindustrybeforeactualconstructionstartsoffevolvedon site

Chart 3 Clash test chart

Aspertheresultsshownthenoofclashesaremorebetween MEPF by resolving this clash a lot of time and rework is savedbeforeexecution.Tosolvetheseclasheswilldepend onthetypeofelementinARC STRmodel,forexample ifthe clash is a wall with duct line it can be easily resolved by making an opening in the wall but if the clash is with structural element such as a column a decision has to be made in the coordination meetings to decide which discipline will modify his work in order to eliminate that clash.

8-CONCLUSION

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The Indian construction industry is less accustomed to usingthetruepowerofBIMtoolsanditspower.

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Usingclashdetectionon thisexaminerather thantraditionalapproachdetects the Clash in3Dviewbeforestartingofrealconstructionso thatit's farbeneficialtodecreasecoordinationmistakes, humanmistakeswhichleadstoexcessivedegreeofaccuracy offashions thereforere workinprojectmaybeavoided

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Inthisreporttotally3826clasheswereidentifiedandthey were resolved. So in the result of G+3 apartment building nearly1%ofsavingcanbedonedesignphaseonly,whenin thismodelimplementinrealtimeconstruction,ithelpsto savemoretime&cost.

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Therefore, implementation ofclashdetection could be veryimportantforErrorfreemodelwhichleadtolesserror freeclashatactualsite.

ACKNOWLEDGEMENT

ThesupportprovidedbystaffofRMDSinhgadInstituteof TechnicalCampus,theHeadofDepartmentandthePrincipal helpingforthisstudyisverymuchappreciated.

REFERENCES

1 MakingaConstructionProjectMoreEfficientusingClash DetectionToolofBuildingInformationModelingProf. Sanjay Karodpati1, Atish Tondale2, Jash Chauhan3, ParthBanpatte41Professor,Dept.ofCivilEngineering, DrDYPatilschoolEngineering,LohegaonPune,India2 4Student(U.G)Dept.ofCivilEnggDrDYPatilSchoolof Engineering,LohegaonPune

2 RavindraSSKMedicharla,inhispapertitled”BimUsage in Construction Industry: An Application of a Modal Integration and Clash Detection Tool in Building Design”,publishedinJuly2020

3 Mr. Swapnesh.P. Raut and Dr.S.S. Valunjkar, in their paper titled “Improve the Productivity of Building ConstructionProjectUsingClashDetectionApplication inBuildingInformationModeling”,publishedinMarch 2017,

4 AbdiSuryadinataTelaga,inhispaperentitled“AReview ofBim(BuildingInformationModeling)Implementation inIndonesianConstructionIndustry”,publishedinMay 2018,

5 Clash Detection and Elimination using BIM MTech Scholar Sanket D. Alone Department of Civil Engineering, Veermata Jijabai Technological Institute, Mumbai,Maharashtra,India

6 Application of BIM in design conflict detection: a case studyofVietnamQuanTNguyen1,2,PhuongQLuu2 andYenVNgo1,21FacultyofConstructionEconomics and Management, National University of Civil Engineering,Hanoi,Vietnam2InstituteofInvestment and Construction Management, National University of CivilEngineering,Hanoi,Vietnam

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