Constructability Assessment Framework Using BIM Technology

摘要

Implementation of constructability/buildability ideas in the construction industry has a potentialreturn on investment concerning time and money. Literature shows that a constructability programprovides benefits to the owners, contractors and designers. It is found that quantified assessment ofdesign is the most suitable approach to improve constructability of projects. The potential use of newtechnology-based tools to assess constructability of a design has not been fully realized. This researchintroduces a new methodology to evaluate the level of application of constructability principles inresidential buildings during design phase. The proposed methodology integrates object oriented BuildingInformation Model (BIM) and 4D CAD simulation model. Factors affecting constructability of buildingdesigns in the Canadian construction industry are identified from a questionnaire survey onconstructability attributes. Multi attribute decision analysis and Analytical Hierarchy Process (AHP) wereused to assess the overall constructability value. Direct applications to check for constructability using 4Dmodels were demonstrated. The new methodology was validated using a case study of condos project indowntown Montreal. The outcome showed that integrating BIM with 4D CAD simulation models has manybenefits to designers in which evaluation of different designs can be done in a more accurate and fasterway.