The role of geometric models' conversion as the base of digital tools of BIM for sustainable architectural design

The paper deals with the problem of CAD models' use in the point of view of sustainable architectural design. Climate change and diminishing resources are increasingly having a significant impact on the way in which we construct the built environment. Architects have to perform complex analyses of buildings' behavior using appropriate tools. Essential component of digital design becomes building information model (BIM) where AEC objects are used, and which results in a comprehensive underlying database. BIM offers a more comprehensive design approach because all aspects of the building are considered during the modeling phase. The methods outlined in the paper are devoted to sustainable design and use BIM as essential part of the applications. The main issue of the paper is that BIM offers its own challenges because of the problems of effective and adequate modeling of design geometry. Our proposal is based on geometric models and conversion methods of geometric objects in order to achieve a final BIM comprising of AEC objects. The research is both theoretical and experimental. The methods used were geometric 3D modeling, algorithm and program development, object-oriented architectural modeling, analysis and synthesis of integrated data.