| 1. |
- Forth, Kasimir, et al.
(författare)
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BIM4EarlyLCA: An interactive visualization approach for early design support based on uncertain LCA results using open BIM
- 2023
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Ingår i: Developments in the Built Environment. - 2666-1659. ; 16
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Tidskriftsartikel (refereegranskat)abstract
- To meet the European climate goals in the building sector, a holistic optimization of embodied greenhouse gas (GHG) emissions using the method of life cycle assessments (LCA) are necessary. The early design stages have high impact on the final performance of the buildings and are characterized by high uncertainty due to the lack of information and not yet taken decisions. Furthermore, most current LCA approaches based on Building Information Models (BIM) require high expertise and experience in both BIM and LCA and do not follow an intuitive visualization approach for other stakeholders and non-experts. This paper presents a novel design-decision-making approach for reducing embodied GHG emissions by interactive, model-based visualizations of uncertain LCA results. The proposed workflow is based on open BIM data formats, such as Industry Foundation Classes (IFC) and BIM Collaboration Format (BCF), and is developed for decision support for non-LCA experts in the early design stages. With the help of a user study, the prototypical implementation is tested by 103 participants with different levels of experience in BIM and LCA based on a case study. We evaluate the proposed approach regarding the support of open BIM data formats, different LCA visualization strategies, and the intuitiveness of different approaches to visualizing uncertain LCA results. The user study results show a broad acceptance and need for open BIM data formats and model-based LCA visualization but less for visualizing uncertainties, which needs further research. In conclusion, this interactive, model-based visualization approach using color coding supports non-LCA experts in the design decision-making process in early design stages.
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| 2. |
- Forth, Kasimir, et al.
(författare)
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Interactive visualization of uncertain embodied GHG emissions for design decision support in early stages using open BIM
- 2023
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Ingår i: Life-Cycle of Structures and Infrastructure Systems - Proceedings of the 8th International Symposium on Life-Cycle Civil Engineering, IALCCE 2023. ; , s. 3634-3641
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Konferensbidrag (refereegranskat)abstract
- To meet the European climate goals in the building sector, a holistic calculation and optimization of embodied greenhouse gas (GHG) emissions using the method of life cycle assessment (LCA) in early design stages are necessary. Hence, this paper presents a comprehensive and transparent design-decision-making approach for reducing embodied GHG emissions in early design stages by interactive, model-based visualizations of uncertain results. The proposed approach is based on a previously developed Natural Language Processing (NLP) based methodology of matching elements of a Building Information Model (BIM) to those of an LCA database. With the help of a prototypical implementation and a case study, the uncertainties of the derived LCA results are visualized using different levels of transparencies. This paper shows that open BIM models and the proposed 3D color coding support the hotspot analysis in combination with box plot diagrams for visualizing uncertain GWP results for decision-making in early design stages.
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| 3. |
- Schumacher, Rebecca, et al.
(författare)
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Analysis of current practice and future potentials of LCA in a BIM-based design process in Germany
- 2022
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Ingår i: E3S Web of Conferences. - : EDP Sciences. - 2555-0403 .- 2267-1242. ; 349
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Konferensbidrag (refereegranskat)abstract
- The construction and building sector, responsible for 39% of global greenhouse gas emissions, is undergoing a fundamental digital transformation enabled by Building Information Modelling (BIM). Integrating life cycle assessment (LCA) in digital building design processes enables early evaluation of embodied impacts. This connection offers opportunities to generate predictive parameters to efficiently use environmental optimization potentials. The aim of this study was to investigate current barriers and incentives for practitioners to use LCA in combination with BIM in practice in Germany. Based on criteria identified in a systematic literature review, a survey amongst 161 practitioners is conducted, analysing five different user profiles. The evaluated criteria are added value, perception of relevance, intention, age, data availability, standardization, external demand and usability. The results present a recognised added value of integrating LCA in BIM from the perspective of all user profiles. Currently, measures in a political and social context have higher potentials, i. e. are more urgent to implement, than measures in the information technology context, whereas priorities vary depending on user profiles. The greatest drivers are external demand and pressure in forms of stricter political requirements and more demand from the public-sector. The presented insights, trends and need for action can support implementing procedures for achieving the urgent climate goals of the construction sector strategically through digital transformation.
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