Automated gbXML-Based Building Model Creation for Thermal Building Simulation

In the area of as-is BIM creation from point cloud, researchers start digging the potential of using point cloud as 3D scenes of the construction job site to monitor construction progresses and safety. However, limited contribution was made in the AEC/FM domain to assist decision making process on building retrofit and renovation. This paper presents a method of automatic gbXML-based building model generation from thermal point cloud. Through the proposed geometry extraction and thermal resistance value estimation techniques, the size and thermal information of the building envelope components are automatically obtained in order to quickly generate building models ready for energy performance simulation. The registered point cloud of a residential house was used as a case study to validate the proposed method.