Structural durability information model is the model which is used to analyze structure durability, including designing, construction and maintenance information. In this paper, the durability analyzing theories were comprehensively studied, and the relative effecting elements were abstracted. By extending existing structural model and construction model with durability information, the structural durability BIM was proposed, and the IFC information models were also extended with durability properties. The proposed results of this paper provided technical supports for developing durability analyzing software system based on BIM and improved the IFC standard.