Creating Structural Model from Ifc- Based Architectural Model

Building information model is an integrated entity that consists of building information from various disciplines, such as architectural, structural, electrical, HVAC, construction management, etc. Direct data sharing and exchange between the architectural and structural disciplines without using paper-drawings is highly desirable in building design and design collaboration. However, structural analysis and design is based on finite element modeling, its concept and data platform are remarkably different from those employed for constructing architectural CAD model. In this paper, based on the Industry Foundation Classes (IFC) standard, a procedure was developed to adapt architectural information directly for construction of a structural model. To this end, a study was performed to determine the relationships and differences of data to be handled between the architectural and structural domains. A unified finite element data file was introduced to capture the data from the architectural domain necessary for the establishment of a structural model. This unified data file is logically organized with ample transparency so that it can be conveniently adopted by different structural analysis systems. The entire data analysis procedure is built around a structural-model server which is equipped with various functions, such as data selection, model editing, visualization, load analysis, data check, preliminary structural analysis, and data interface with various finite element systems. A general algorithm on structural model generation from IFC compatible architectural model was presented with an illustrative example.