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i
BRIDGING
THE
GAP:
A
TOOL
TO
SUPPORT
BIM
DATA
TRANSPARENCY
FOR
INTEROPERABILITY
WITH
BUILDING
ENERGY
PERFORMANCE
SOFTWARE
A
Thesis
Presented
to
The
Faculty
of
the
School
of
Architecture
University
of
Southern
California
In
Partial
Fulfillment
of
the
Requirements
for
the
Degree
Master
of
Building
Science
By
Mohammed
Omar
Hijazi
May
2015
Object Description
| Title | Bridging the gap: a tool to support bim data transparency for interoperability with building energy performance software |
| Author | Hijazi, Mohammed Omar |
| Author email | hijazi@usc.edu;mohammad.o.hijazi@gmail.com |
| Degree | Master of Building Science |
| Document type | Thesis |
| Degree program | Building Science |
| School | School of Architecture |
| Date defended/completed | 2015-03-23 |
| Date submitted | 2015-04-16 |
| Date approved | 2015-04-17 |
| Restricted until | 2015-04-17 |
| Date published | 2015-04-17 |
| Advisor (committee chair) | Kensek, Karen M. |
| Advisor (committee member) |
Konis, Kyle Noble, Douglas |
| Abstract | Many gaps exist between (BIM) authoring software and Building Energy Modeling (BEM) tools. One gap is due to loss of data in the exchange between the design and energy simulation models. Energy efficiency is now, more than ever, a top concern that should be addressed in the earliest of the design stages. Explaining, understanding, and enhancing the data transfer between software would allow better design decisions through more accurate coordination between energy simulation and building modeling. ❧ The data exchange is done mainly using either Green Building XML (gbXML) or Industry Foundation Classes (IFC). Both offer geometrical and thermal data transfers; however they are structured and function differently. Their structure, ability to encode, and ability transfer relevant data from BIM authoring software to the BEM tools were examined. ❧ A simple model was exported from BIM authoring software using both file formats and then imported to selected energy simulation tools. The export functionality of the BIM-authoring software and the import functionality of the BEM tools was ""validated"" by comparing the values with the original inputted data in the BIM authoring tool. Special consideration was given to understanding and testing the structure of the data models to encode both geometric data and information, the ability of BIM authoring tools to export, and energy software to import the appropriate data. In many cases, the exchange of data was not complete and in several cases inaccurate or not transparent to the user. ❧ A major failing in the data transfer was also user expectations. A user might assume that the data transfer is accurate and therefore base on its export from the building information modeling software; another assumption might be that because it is not, it is useless. It would be extremely helpful to show exactly not only what is being transferred, but also what is actually input as the file is loaded into the energy software. Transparency is critical, especially for inexperienced users. A Data Transparency Tool (DTT) was developed to allow the user to verify the data in the gbXML files and then correct inaccuracies. This is done by applying a transparency layer upon the gbXML data model so users can easily understand what is being transferred. ❧ The process of creating the tool was divided into three steps: 1) Matching gbXML enumerations with a defined set of critical building variables that affect energy consumption. These variables were grouped under four main categories: program, form, fabric and equipment. 2) Utilizing the gbXML XML schema to map new XML schemes that match the variable set. 3) Presenting the scheme in a Data Transparency Tool that would automatically populate and analyze the data. |
| Keyword | BIM; building information modeling; data exchange; interoperability; BEM; building energy modeling; IFC; gbXML |
| Language | English |
| Format (imt) | application/pdf |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m |
| Contributing entity | University of Southern California |
| Rights | Hijazi, Mohammed Omar |
| Physical access | The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given. |
| Repository name | University of Southern California Digital Library |
| Repository address | USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA |
| Repository email | cisadmin@lib.usc.edu |
| Filename | etd-HijaziMoha-3319.pdf |
| Archival file | Volume1/etd-HijaziMoha-3319.pdf |
Description
| Title | Page 1 |
| Repository email | cisadmin@lib.usc.edu |
| Full text | i BRIDGING THE GAP: A TOOL TO SUPPORT BIM DATA TRANSPARENCY FOR INTEROPERABILITY WITH BUILDING ENERGY PERFORMANCE SOFTWARE A Thesis Presented to The Faculty of the School of Architecture University of Southern California In Partial Fulfillment of the Requirements for the Degree Master of Building Science By Mohammed Omar Hijazi May 2015 |
