Details of the Mapping Between the CIS/2 and IFC Product Data Models for Structural Steel.

摘要

The CIMsteel Integration Standards (CIS/2) (Crowley and Watson, 2000, Eastman et al, 2005) are the product model and electronic data exchange format for structural steel project information. CIS/2 is intended to create a seamless and integrated flow of information among all parties of the steel supply chain involved in the construction of steel framed structures. The Industry Foundation Classes (IFC) (Liebich et al, 2006) are the product model developed by the International Alliance for Interoperability to facilitate interoperability in the building industry. While the CIS/2 and IFC product models have different views of modeling structural steel, a useful mapping from the CIS/2 product model to the IFC product model has been developed. The mapping permits structural steel models from CIS/2-aware design, structural analysis, detailing and fabrication software packages to be imported into IFC-aware software packages to perform model coordination between the structural steel and the other parts of the building such as floors, walls, windows, doors, ductwork, and mechanical systems. Conceptually, the relationship between CIS/2 and IFC is shown in Fig. 1. IFC provides integration of building information across multiple subsystems and ultimately across a buildings entire lifecycle. CIS/2 provides vertical integration of structural steel information across design, structural analysis, detailing, and fabrication. Where CIS/2 and IFC intersect in the structural area is where the mapping between CIS/2 and IFC is important. This paper provides additional details for the paper Mapping Between the CIMsteel Integration Standards and Industry Foundation Classes Product Data Models for Structural Steel (Lipman, 2006) that was published in the proceedings of the 11th International Conference on Computing in Civil and Building Engineering held in Montreal, Canada on 14-16 June 2006. That paper is a general overview of the mapping issues between CIS/2 and IFC, however, there are very few detailed examples. For this paper to be more useful, it is helpful if the reader has read the original paper and has some knowledge about the basics of CIS/2 and IFC.