An Integrated Assessment Framework of Economic, Environmental, and Human Health Impacts Using Scan-to-BIM and Life-Cycle Assessment in Existing Buildings

The significance of environmental management of existing buildings in reducing the environmental impact of the construction sector is increasingly emphasized. However, life-cycle assessment (LCA) to evaluate a building's environmental burden requires considerable time and costs for the collection and interpretation of data needed for analysis. Therefore, this study proposed an integrated assessment framework of economic, environmental, and human health impacts using scan-to-building information modeling (BIM) and LCA in existing buildings. To verify the proposed framework, a case study was conducted. A BIM model with an error rate of 1.442% can be automatically generated from the three-dimensional (3D) point cloud using parametric algorithm. The total cost for the target case was calculated at USD 162,769, and the environmental cost accounted for the largest percentage at 97.15%. The developed framework in this study holds significance because it enables the automated assessment of economic, environmental, and human health impacts of existing buildings through the integration of BIM and LCA.