JAUE2024-049: Research on the Lightweight BIM System for Duct Design

Abstract

Existing BIM software generates geometric data in a three-dimensional format, resulting in large file sizes that require significant time to open. Consequently, recommended computer specifications have been increasing annually, presenting challenges to the widespread adoption and application of BIM software. Therefore, focusing on lightweight BIM design applications, we propose a web-based approach for duct design using Three.js, an open-source JavaScript 3D library. This method utilizes BIM libraries from external equipment manufacturers. It involves laying out predefined diffusers, equipment, and ducts in a 2D interface and automatically constructing duct fittings and the entire duct system, including connectivity relationships between duct elements. Moreover, a lightweight BIM system for duct design will be developed, leveraging LOD (Level of Detail) data reduction techniques based on the object's distance from the viewpoint. Finally, all duct elements, along with system information, will be saved in JSON and IFC formats. The proposed BIM approach is designed to be adaptable to mobile devices, thereby facilitating broader adoption of BIM technology.