Research Sruti

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Master of Construction Management Research paper. Completed Nov 2010.

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Research Sruti

  1. 1. SRUTI NALLAPANENI PROFESSIONAL PAPERL DEPARTMENT OF CONSTRUCTION SCIENCE TEXAS A&M UNIVERSITY DATA TRANSFER BETWEEN BIM BASED AUTODESK REVIT ARCHITECTURE AND ENERGY ANALYSIS TOOLS: ECOTECT, DESIGN BUILDER AND EQUEST FROM AN INTEROPERABILITY PERSPECTIVE
  2. 2. ABSTRACT The intent of this study is to test whether the present BIM software, specifically Autodesk® Revit Architecture, is robust enough to allow seamless interoperability with Energy analysis programs such as Autodesk ® Ecotect, DesignBuilder, and eQuest. This study tests interoperability for certain formats like gbXMLs and IFCs, and analyze what information, apart from geometry was transferred during data transfer. Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University Ref: pg iii
  3. 3. SRUTI NALLAPANENI RESEARCH PROPOSAL DEPARTMENT OF CONSTRUCTION SCIENCE TEXAS A&M UNIVERSITY IMPORTANCE OF INTEROPERABILITY As the building project progress the ability to incorporate the simulation results and to make changes to the original design becomes more difficult and expensive. Cost of implementing performance improvements contrasted with the effect on building performance for the different stages of a building project. Source :< http://www.aecbytes.com/feature/2008/Interoperability_SustainableDesign.html> Ref: pg 6 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  4. 4. SRUTI NALLAPANENI RESEARCH PROPOSAL DEPARTMENT OF CONSTRUCTION SCIENCE TEXAS A&M UNIVERSITY 1. The analysis software could also be implemented by programming new functionality to BIM software (Hakkinen). 2. Software integrated with a BIM server using a specific API(Application Programming Interface). 3. Separate software that can use file exchange with BIM. WAYS TO INTEGRATE THE CHALLENGE 1. Finding the right combination of tools for effective information sharing to populate an adequate BIM using the available tools in the industry is not an easy task. 2. Most of these energy simulation only enable one way transfer of information, exporting information back to BIM even through an “interface” is not yet possible. Ref: pg 8 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  5. 5. LITERATURE REVIEW TITLE INTEROPERABILITY BETWEEN BUILDING INFORMATION MODELS (BIM) AND ENERGY ANALYSIS PROGRAMS AUTHOR Sumedha Kumar Thesis from the University of Southern California OBJECTIVE To test whether BIM software, specifically Revit MEP, was robust enough to allow seamless interoperability with analysis programs such as Ecotect and IES<VE>. RECOMMENDED FUTURE WORK The BIM software selected for this particular study was Revit and energy analysis tools were IES and Ecotect. A future study in BIM could take other different programs. Further studies could use larger and more complex building models and analysis of data transfer in them. Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  6. 6. This paper will explore the various available options for data exchange from a BIM tool (Autodesk Revit) for energy analysis and what is possible with currently available software. RESEARCH OBJECTIVE THE INTENT 1. Analyze the energy analysis software’s import/export capabilities . 2. Analyze all the possible Information Exchange paths with Autodesk Revit. 3. Look for possible loss of model information during the file transfer. 4. Identify user-friendly and efficient paths among the various options suggested that could create an adequate BIM for use by students and industry. 5. Scope/ opportunity for future work. Ref: pg 10 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  7. 7. BIM ITEROPERABLE FILE FORMATS ENERGY ANALYSIS TOOLS AUTODESK REVIT Architecture DXF gbXML IFC. Ecotect DesignBuilder(EnergyPlus) eQUEST(DOE 2.2) PLUG INS, MIDDLEWARE Etc. INFORMATION LOSS AREAS OF STUDY AREAS OF STUDY Modeling tool: Autodesk® Revit Architecture 2011 Energy Analysis Tools: Autodesk® Ecotect Analysis 2011, eQUEST v3.6, DesignBuilder v2.2 File Formats: DXF, gbXML, IFC Ref: pg 11 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  8. 8. CASE MODEL The significant parameters defined in the BIM case model are: BIM Tool: Autodesk Revit Architecture Built up Area: 6000 sf 1. Drawing Units 2. Zone Definition 3. Geometry- Shape/Area/Volume 4. Building Type 5. Location 6. Material Properties Building Information: 1. Project type: OFFICE 2. Location: HOUSTON 3. Export Complexity: SIMPLE WITH SHADING SURFACES 4. Address: 400, TERRACE DR, HOUSTON, TX 77007 5. Units: COMMON-FEET, INCHES, SQUARE FOOT, CUBIC FOOT 6. Latitude and Longitude: 29.7687°, -95.3867°(Corresponding to the address given) BUILDING INFORMATION Ref: pg 37 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  9. 9. BUILDING INFORMATION MODEL AND ENERGY ANALYSIS TOOLS: AN INTEROPERABILITY PERSPECTIVE Pitched roof, Ceiling inside Skylights Linear Walls Windows Doors Curved Wall Terrace CASE MODEL Ref: pg 36 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  10. 10. BIM TOOL ENERGY ANALYSIS TOOLS Autodesk® Revit Architecture Exports Autodesk® Ecotect Imports DesignBuilder Imports eQuest Imports RVT DWG DWG DXF DXF DXF DXF bgXML gbXML gbXML IFC IFC Interoperability of the Energy Analysis tools with Revit Architecture - DXF and DWG are geometry carrying file formats, does not support zone definitions. - gbXML and IFC are BIM based formats capable of carrying information for energy analysis. FILE FORMATS Ref: pg 32 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  11. 11. OPENINGS BOUNDING ELEMENTS SPACE(AREA, VOLUME) ROOMS WALLS WINDOWS DOORS OPENINGSFLOORS CURTAIN WALLS CEILINGS ROOFS SKYLIGHTS Revit Physical Case Model Model gbXML Analytical Volumes gbXML Analytical Surfaces Hierarchy of elements contained in a Revit Analytical model EXPORTS REVIT TO gbXML Ref: pg 42 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  12. 12. The IFC case model as seen on the IFC viewer EXPORTS REVIT TO IFC Elements in the IFC model IFC Physical Model Project Information Ref: pg 43 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  13. 13. EXPORTS INFORMATION CARRIED gbXML IFC  File Version  Units  Campus ID  Location( Zip Code, latitude, longitude)  Area, Volume  Building Id  Description  Shell Geometry Id Cartesian Points, Co- ordinates.  Shell Surface(Types such as Walls)  Shell Openings (Types such as windows)  Space ID  Surface ID  Program Information Product name,  version  Platform  File Description,  File name and file schema  Units (Length, Area, Volume)  Organization, Person, owner history.  Cartesian points, direction, dimensional exponents, shape representation  Product definition and shape.  Property value (Offsets, extensions, room bounding, wrapping, assembly description, wall/window functions, thickness.)  Predefined parameters associated with elements, for example, roof: rafter cut, fascia depth, truss, thickness, base offset etc. Material, layer set, Color. Comparison of information carried by gbXML and IFC formats Ref: pg 21 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  14. 14. ECOTECT IMPORT TRANSFER PATHS gbXML IMPORT gbXML Case Model in Ecotect Ref: pg 46 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  15. 15. ECOTECT IMPORT DXF IMPORT IFC IMPORT DXF Case Model in Ecotect IFC Case Model in Ecotect Ref: pg 49 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  16. 16. ECOTECT IMPORT IFC IMPORT Sample Model BIM in Revit IFC Sample Model in Ecotect Ref: pg 51 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  17. 17. DESIGNBUILDER IMPORT TRANSFER PATHS gbXML IMPORT gbXML Case Model in DesignBuilder Ref: pg 55 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  18. 18. DESIGNBUILDER IMPORT gbXML IMPORT Sample Model BIM in Revit IFC Sample Model in DesignBuilder Ref: pg 57 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  19. 19. eQUEST IMPORT TRANSFER PATHS gbXML IMPORT Result of the INP import of the Case Model generated by Green Building Studio in to eQuest Ref: pg 60 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  20. 20. RESULTS PARAMETERS FORASSESSING INFORMATION LOSS -Parameters studied are related to the building physical model and the constructive elements, which are required for the thermal analysis. Any other elements that are required for a different category of analysis like acoustical or CFD, like the furniture and the interior partition elements are not considered. - The points given to these parameters are based on the literature study and may in certain cases differ according to individual perspective and according to the context of use of this model. ASSUMPTIONS Assessment Parameters of Interoperability between Revit 2011 and Energy analysis tools. Points Thermal Zones 12 Does it import Thermal Zones for Environmental Analysis Geometry 11 Did it import Room Spaces? 10 Was the geometry correct? 9 Does it allow for geometric modification? Materials 8 Did it import properties of Materials? 7 Did it allow the specification of new material? 6 Did it import the parent material thickness? Elements 5 Did it import all constructive elements? 4 Did it recognize the imported constructive elements as surfaces? Data 3 Did it import Project coordinates, Location? 2 Did it import Project Type? 1 Does it import project units? Total Points 78 Ref: pg 44 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University
  21. 21. RESULTS ASSESSING INFORMATION LOSS Ref: pg 54, 59, 64 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University Assessment Parameters of Interoperability between Revit 2011 and Ecotect Ecotect Import DesignBuilder Import eQUEST Import Points via gbXML Points achieve d via IFC Points achieve d via gbXML Points achieve d from GBS Points achieve d Thermal Zones 12 Does it import Thermal Zones for Environmental Analysis  12  0  12  12 Geometry 11 Did it import Room Spaces?  11  0  11  11 10 Was the geometry correct?  10  0  0  0 9 Does it allow for geometric modifications?  9  9  9  0 Materials 8 Did it import properties of Materials?  0  0  0  0 7 Did it allow the specification of new material?  7  7  7  0 6 Did it import the parent material thickness?  0  0  6  6 Elements 5 Did it import all constructive elements?  0  5  0  0 4 Did it recognize the imported constructive elements as surfaces?  4  4  4  4 Data 3 Did it import Project coordinates, Location?  3  0  0  0 2 Did it import Project Type?  0  0  2  0 1 Does it import project units?  0  0  0  1 Total Points 78 Points Achieved 7 56 4 25 7 51 5 34
  22. 22. CONCLUSIONS COMPARING TOOLS Ref: pg 68 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University 56 51 34 25 0 10 20 30 40 50 60 Ecotect DesignBuilder eQuest gbXML IFC 7 7 5 4 0 1 2 3 4 5 6 7 8 Ecotect DesignBuilder eQuest Number of Parameters fulfilled Points Achieved Graphical comparison of the three Energy Simulation tools based on the efficiency of receiving information from the respective file formats, gbXML and IFC Ecotect and DesignBuilder fulfill the same number of parameters but, DesignBuilder’s failure in generating a complete and accurate model gives it lower points compared to Ecotect.
  23. 23. CONCLUSIONS COMPARING TOOLS Ref: pg 69 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University Performance of each tool under the various parameters. 0 2 4 6 8 10 12 14 gbXML IFC gbXML gbXML Ecotect Design Builder eQuest Thermal Zones Room Spaces Correct Geometry Geometry Modification Material Properties New Material Specifications Material Thickness Constructive Elements Surface recognition Location Project Type Project Units
  24. 24. CONCLUSIONS Ref: pg 65 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University 1. Ecotect is comparatively more efficient in terms of successful geometry and information transfer. 2. DesignBuilder can be a more powerful tool for energy simulation if its gbXML import capabilities are improved for an accurate geometry transfer. 3. gbXML is a simplified schema for energy analysis, preparing an analytical model from a BIM for gbXML import can be time consuming for large and complex projects, hence a preferred format during design development or schematic stage. 4. gbXML can not carry information such as equipment type for advanced thermal simulation hence may not help with system sizing. 5. Bidirectional information flow can not be achieves with these formats due to the limited information carried from BIM to analysis tools and also due to loss of information in the process. 6. IFC can have a scope of supporting bidirectional information flow as it is carries a more comprehensive building data, if Revit can support IFC import and analysis tools can support IFC exports.
  25. 25. Ref: pg 71 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University 1. IFC’s capabilities for bi directional interoperability achieved from further enhancements in the schema. A initiation by the buildingSmart in developing schemas like ifcXML can make energy analysis more efficient and informative. 2. Similar study can be extended to other BIM tools like ArhiCAD or Vectorworks, which can give different results as opposed to Revit. 3. Similar study can be conducted for Energy simulation tools that embedded with in BIM tools. Results can show improved integration of energy analysis within BIM. RECOMMENDATIONS
  26. 26. Ref: pg 65 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University 1. Andrew, M. J. (2003). Ecotect and EnergyPlus, . Retrieved August 14, 2010, from Building energy Simulation User News, Vol 24: http://simulationresearch.lbl.gov/EP/un_ecotect.pdf 2. Autodesk Revit Architecture: Product Brochure. (n.d.). Retrieved August 25, 2010, from Autodesk Website: www.autodesk.com 3. Building Information Modeling in Wikipedia. (n.d.). Retrieved May 12, 2010, from http://en.wikipedia.org/wiki.Building_Information_Modeling 4. buildingSMART website, Model-Industry Foundation Classes. (n.d.). Retrieved August 25, 2010, from building SMART: http://www.buildingsmart.com/bim 5. Chuck Eastman, P. T. (2008). BIM Hnadbook- A guide to Building Information Modeling. New Jersey: John Wiley and Sons. 6. DesignBuilder. (2010). Retrieved August 14, 2010, from http://www.designbuildersoftware.com/designbuilder.php BIBLOGRAPHY
  27. 27. Ref: pg 65 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University 7. DOE2.com. (n.d.). Retrieved September 23, 2010, from Doe2 official website: http://www.doe2.com/ 8. DXF in Wikipedia. (n.d.). Retrieved August 13, 2010, from http://en.wikipedia.org/wiki/AutoCAD_DXF 9. Eastman, C. (1999). Building Product MOdules: Computer Environments Supporting Design and Construction. Florida: CRC Press LLC. 10. GSA. (2007). 3D-4D BIM Overview. Retrieved May 13, 2010, from US General Services Administration website: http://www.gsa.gov/graphics/pbs/GSA_BIM_Guide_v0_60_Series01_Overview_05_ 14_07.pdf 11. Hakkinen, T. Sustainable Building and BIM. Finland: VTT Technical research center. 12. Khemlani, L. (2004). The IFB building Model: A look under the hood. Retrieved September 10, 2010, from AECbytes: http://aecbytes.com/feature/2004/IFCmodel.html 13. Kumar, S. (2008, May). Interoperability between Information modeling and energy analysis programs. University of Southern california . BIBLOGRAPHY
  28. 28. Ref: pg 65 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University 14. Olof Granlund Oy, M. K. (2008). Energy Analysis Software Evaluation. Retrieved September 12, 2010, from BIm and Building simulation Research: www.stanford.edu/.../BIM%20and%20Building%20Simulation%20Research/Granlun d_Report_SoftwareEvaluation.pdf 15. Paola C. Ferrari, N. F. (2010). Building Information Modeling and Interoperability with Environmental Simulation Sustems. Innovations and Advances in Computer Sciences and Engineering , 579-583. 16. Phillip G. Bernstein, J. H. (2004, November). Barriers of Adoptation of Building Information Modeling in the Building Industry. Retrieved August 24, 2010, from Autodesk Building Solutions White Paper: images.autodesk.com/adsk/files/bim_barriers_wp_mar05.pdf 17. Salman Azhar, J. B. (2009). BIM for sustainability analysis. International Journal of Construction Education and Research (5:4), 276-292. 18. Taking the LEED with BIM. (n.d.). Retrieved June 15, 2010, from Constructech.com: http://www.constructech.com/news/articles/article.aspx?article_id=7860 19. Tatjana Dzambazova, E. K. (2009). Introducing REvit Architecture 2011: BIM for beginners. Indianapolis: Wiley Publishing, Inc. BIBLOGRAPHY
  29. 29. Ref: pg 65 Sruti Nallapaneni Professional Paper Department of Construction Science Texas A&M University 20. Thoo, S. (2008, August 14). Interoperability and Sustainable Design. Retrieved September 29, 2010, from AECbytes feature: http://www.aecbytes.com/feature/2008/Interoperability_SustainableDesign.html 21. Tobias Maile, M. F. (2007). Building Energy Performace Simulation Tools-A Life-Cycle and Interoperable perspective. Stanford: Center for Integrated Facility Engineering, Stanford University. 22. Tuomas laine, R. H. (2007). Benefits of BIM in the Thermal Performance Management. Building Simulation. Helsinki, Finland. 23. www.gbxml.org. (n.d.). Retrieved August 10, 2010, from www.gbxml.org BIBLOGRAPHY

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