Abstract Building Information Modelling (BIM) is a promising technology for building lifecycle management. Currently, BIM has been extensively used in both the sketch design (sketch) and detailed design (design) stages. Due to different purposes and different BIM tools, the reusability of sketch BIM models in the design stage is still challenging. To address this issue, this study proposes a building element identification scheme using a segmentation-aggregation strategy, termed EI-SA. Since Industrial Foundation Classes (IFC) is the international standard of BIM, the EI-SA is built according to the IFC specification. Firstly, the element identification Problem is formally defined, followed by the overall framework of the EI-SA. Then, a presentation-level BIM segmentation algorithm is developed to divide a sketch BIM model into slices of geometric representations. Thirdly, a representation aggregation scheme is proposed to solve the element identification problem. The representation aggregation scheme employs a triangle-triangle intersection to detect the geometric connection and an object recognition algorithm to identify elements. Finally, experiments were conducted on several sketch BIM models. The experiment results showed that the EI-SA identified 82.22% elements on average, which verified the effectiveness of the EI-SA. To the best of our knowledge, this study is the first to solve the building element identification problem according to IFC. The proposed EI-SA will bridge the gap between sketch BIM models and design BIM models, smooth the reusability of data from the sketch stage to downstream stages, and improve the design efficiency by avoiding the re-designing of building elements.

中文翻译：

---

从草图 BIM 到设计 BIM：使用工业基础类和对象识别的元素识别方法

摘要 建筑信息模型（BIM）是一种很有前途的建筑生命周期管理技术。目前，BIM已广泛应用于草图设计（sketch）和详细设计（design）两个阶段。由于目的不同，使用的BIM工具不同，设计阶段BIM模型草图的可复用性仍然具有挑战性。为了解决这个问题，本研究提出了一种使用分段聚合策略的建筑元素识别方案，称为 EI-SA。由于工业基础类 (IFC) 是 BIM 的国际标准，因此 EI-SA 是根据 IFC 规范构建的。首先，正式定义元素识别问题，然后是EI-SA的整体框架。然后，开发了表示级 BIM 分割算法，将草图 BIM 模型划分为几何表示的切片。第三，提出了一种表示聚合方案来解决元素识别问题。表示聚合方案采用三角形-三角形交集来检测几何连接和对象识别算法来识别元素。最后，对几个草图 BIM 模型进行了实验。实验结果表明EI-SA平均识别出82.22%的元素，验证了EI-SA的有效性。据我们所知，本研究是第一个根据 IFC 解决建筑元素识别问题的研究。拟议的 EI-SA 将弥合草图 BIM 模型和设计 BIM 模型之间的差距，