关键词: IFC 标准, BIM 技术, IFC 实体扩展

Abstract: Based on the condition of deficiencies of entities in the domain layer of IFC standard and
demands of data sharing and exchanging in AEC industry, this paper proposed an idea of expanding
the entities of the domain layer of IFC standard. With a case study of entities in electric domain, this
paper elaborates a specific method of expanding entities of the domain layer of IFC standard: add the
new entity into the domain layer of IFC standard by editing the EXPRESS-G schema, obtain an IFC
file of the new entity by BIM software and test this file on SJTUBIM platform developed by the BIM
research team of SJTU. This paper proved the feasibility to expand IFC entities. The integrity of
information description in whole building life cycle can be promoted with IFC standard when
adopting this expansion method. With the development of new equipment, the expansion of IFC
entities will push forward the progress in digitizing expressing and facilitate efficiency sharing and
exchanging of project information.

Key words: IFC standard, technology of BIM, expansion of IFC entity