To facilitate BIM-to-Building Energy Modeling (BEM) geometric transformation, IFC provides a concept of second-level space boundary (SB). In the current practice, however, quality issues of second-level SBs in IFC models are often found, which makes it critical to evaluate their quality before retrieving them for energy analysis. Each second-level SB is objectified by carrying surface geometry and rich semantic data. Manually checking a large number of second-level SBs thus becomes error-prone and impracticable, while automatic and reliable approaches are still not available. This study presents an automated system to validate IFC second-level SBs with 38 rules in terms of syntactic and semantic correctness, geometric correctness, and consistency. The test results with an IFC model of a real-world building show that the system allows users to reliably evaluate the quality of second–level SBs as well as conveniently locate and visualize detected geometric and non-geometric errors.

为了促进BIM到建筑能源建模（BEM）的几何转换，IFC提供了二级空间边界（SB）的概念。但是，在当前实践中，经常会发现IFC模型中二级SB的质量问题，这使得在对其进行能量分析之前评估其质量至关重要。每个第二级SB通过携带表面几何形状和丰富的语义数据来实现目标。因此，手动检查大量第二级SB变得容易出错且不可行，而自动和可靠的方法仍然不可用。这项研究提出了一种自动化系统，可使用38条规则从句法和语义正确性，几何正确性和一致性方面验证IFC二级SB。