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Building Information Modeling (BIM) & Industry Foundation Classes (IFC)

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  • 1. Building Information Model ing (BIM) & Industry Foundation Classes (IFC) Alper DİNÇER 16 December 2008
  • 2. Contents
    • What is BIM?
    • What is IFC?
    • Relationship between BIM and IFC
    • Example s
    • Results & Discussions
  • 3. What is BIM?
  • 4. What is BIM?
    • Building Information Modeling (BIM) is the process of generating and managing building data during its life cycle.
    • I t uses three-dimensional, real-time, dynamic building modeling software to increase productivity in building design , construction and maintenance period
  • 5. What is BIM?
  • 6. What is BIM?
    • Working with :
    • building geometry
    • spatial relationships
    • geographic information
    • quantities
    • properties
    • of building components.
  • 7. What is BIM?
    • S imilar terms as :
    • 3D, object-oriented, AEC-specific CAD (by Autodesk)
    • Building Product Model (Professor Charles M. Eastman)
    • Virtual Building
    • Virtual Building Environment
    • BuildingSMART
    • Virtual Design and Construction
  • 8. What is BIM?
    • BIM is in the middle of Architecture, Engineering and Construction (AEC) phases .
    • BIM according to American Institute of Architects as “a model-based technology linked with a database of project information”
  • 9. What is BIM?
    • The 3D representation of models with building information gets the power of BIM .
    • CAD/CAM + Intelligence = BIM
  • 10. What is BIM?
  • 11. What is BIM?
  • 12. What is BIM?
  • 13. What is BIM?
    • BIM is a process which goes far beyond switching to new software. It requires changes to the definition of traditional architectural phases and more data sharing than most architects and engineers are used to .
  • 14. What is BIM?
    • Associated General Contractors in US describe BIM as “an object-oriented building development tool that utilizes 5-D modeling concepts, information technology and software interoperability to design, construct and operate a building project, as well as communicate its details.”
  • 15. What is BIM?
    • X, Y, Z  3D
    • 3D + time  4D
    • 4D + cost  5D
    • 5D + sustainability + accessbility  nD
  • 16. What is BIM?
    • A dvantages of using BIM 
    • INTEROPERABILITY
    • Improved visualization
    • Improved productivity due to easy retrieval of information
    • Increased coordination of construction documents
    • Embedding and linking of vital information such as vendors for specific materials, location of details and quantities required for estimation and tendering
    • Increased speed of delivery
    • Reduced costs
  • 17. What is BIM?
    • A report prepared by US National Institute of Standards and Technology (NIST) which is about “Cost Analysis of Inadequate Interoperability in the U.S. Capital Facilities Industry”. The report concludes that inadequate interoperability is results in $15.8 Billion lost annually.
  • 18. What is BIM? General Contractors or Construction Managers
  • 19. What is BIM?
  • 20. What is BIM?
  • 21. What is IFC?
    • The Industry Foundation Classes (IFC) are often talked about in the construction industry as an important resource for interoperability.
  • 22. What is IFC?
    • 1985-1990  CAD era
    • DXF – IGES (geometry based formats)
    • 1990-1995  STEP-Exchange(-G)
    • 1995-Today  IFC
  • 23. What is IFC?
    • AEC organizations have several industry based product models on EXPRESS language, which are as follows:
    • AP 225 - Building Elements Using Explicit Shape Representation (ISO 10303)
    • AP 241 - Generic Model for Life Cycle Support of AEC Facilities (ISO 10303)
    • CIS/2 – CimSteel Integration Standard, Version 2 (for structural steel)
    • IFC - Industry Foundation Classes (by International Alliance for Interoperability - IAI)
  • 24. What is IFC?
    • International Alliance for Interoperability (IAI)
    • Autodesk and 12 US companies in 1995
    • IAI is the responsible organization of developing Industry Foundation Classes
    • T he goal of publishing the Industry Foundation Class (IFC) as a neutral AEC product model responding to the AEC building lifecycle
  • 25. What is IFC?
    • D omains under the IAI, which are as follows:
    • AR - Architecture
    • BS - Building Services
    • CM - Construction: CM1 - Procurement Logistics, CM2 - Temporary Construction
    • CS - Codes and Standards
    • ES - Cost Estimating
    • PM - Project Management
    • FM - Facility Management
    • SI - Simulation
    • ST - Structural Engineering
    • XM - Cross Domain
  • 26. What is IFC?
    • STEP has following properties:  
    • use of a machine readable modeling language instead of a file format;
    • the language emphasizes data declarations but includes procedural capabilities for rules and constraints;
    • the language has mappings to different implementations, including a text file format, database schema definitions, and recently, XML schemas;
    • reference sub-models that are shared and re-used subsets of larger standard models for geometry, measurements, representation classification and other generic needs.
  • 27. What is IFC?
    • Most important outcome of the STEP is EXPRESS modeling language.
    • EXPRESS adopts many object-oriented concepts, including multiple inheritances. Object refers to a computer language concept, which is broader than just representing physical objects. Thus objects can be used to represent conceptual or abstracted objects, materials, geometry, assemblies, processes and relations, among other things.
  • 28. What is IFC?
    • The IFCs are defined in EXPRESS.
    • Implementations :
    • ISO-10303-21, Part-21 or P-21 file
    • SQL and object-based database implementations
    • XML implementations (ISO-10303-28 or Part 28 format )
  • 29. What is IFC?
    • IFC was designed as an extensible “framework model”
    • I ts initial developers intended it to provide broad general definitions of objects and data from which more detailed and task-specific models could be defined
    • IFC has been directed to address all building information, over the whole building lifecycle, from feasibility and planning, through design (including analysis and simulation), construction, to occupancy and operation
  • 30. What is IFC? B asic properties such as geometry, material, quantity, measurement, date and time, cost, actors, roles Kernel schema defines core concepts such as actor, group, process, product, relationship . The Product Extension schema defines abstract building components such as space, site, building, building element, annotation The other two Extension schemas define process and control related concepts such as task, procedure, work schedule, performance history, work approval This level comprises entity categories that are commonly used and shared between multiple building construction and facilities management applications. For ex: Shared Building Elements schema has entity definitions for a beam, column, wall, door The highest level of the IFC model contains entity definitions for concepts specific to individual domains such as architecture, structural engineering, facilities management
  • 31. What is IFC?
  • 32. What is IFC?
  • 33. What is IFC?
    • Example Worldwide Projects
    • CORENET (by the Singaporean Building and Construction Authority)
    • BuildingSmart (by the Norwegian government and construction industry)
    • The General Services Administration (in US)
    • Ifc-mBomb (in UK)
    • IFC Model Server project (in Finland)
  • 34. Example
    • .....
    • #9882=IFCCARTESIANPOINT((0.050813,-0.021048,1.01));
    • #9883=IFCCARTESIANPOINT((0.055,0.,1.01));
    • #9884=IFCCARTESIANPOINT((0.04037,0.,1.01));
    • #9885=IFCCARTESIANPOINT((0.037297,-0.015449,1.01));
    • #9886=IFCPOLYLOOP((#9882,#9883,#9884,#9885));
    • #9887=IFCFACEOUTERBOUND(#9886,.T.);
    • #9888=IFCFACE((#9887));
    • .....
    • #11117=IFCLOCALPLACEMENT(#22,#11116);
    • #11137=IFCLOCALPLACEMENT(#11117,#11136);
    • #11138=IFCBUILDINGSTOREY('0569RZjlT2WhKYZgDcscTZ',#16,'EG','Ground Level of the FZK-House, Institut fuer Angewandte Informatik, Forschungszentrum Karlsruhe','',#11137,$,'Erdgeschoss',.ELEMENT.,0.);
  • 35. Example
  • 36. Example
  • 37. Example DEMO
  • 38. Example Video Time!
  • 39. Results
    • The IFC, as the only public and well-developed data model for buildings and architecture, is a de facto standard worldwide.
    • It is being picked up and used in a growing number of applications, in both the public and private sectors.
    • The IFC, as a data model standard, is very alive.
  • 40. Results
    • T here are still some missing points due to standardization.
    • Some parts of the AEC are still evolving in IFC and other parts of the IFC needs testing to prove their standardization.
    • There are also some problems with the translator software that some of them can transfer models to IFC properly.
  • 41. Results
    • BIM and IFC are still emerging technology
    • T hey need some time to complete their evolution.
  • 42. Thanks for attention!

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