Topology Optimization and Robotic Fabrication of Advanced Timber Space-Frame Structures
This paper presents a novel method for integrated topology optimization and fabrication of advanced timber space-frame structures. The method, developed in research collaboration between ETH Zürich, Aarhus School of Architecture and Israel Institute of Technology, entails the coupling of truss-based topology optimization with digital procedures for rationalization and robotic assembly of bespoke timber members, through a procedural, cross-application workflow. Through this, a direct chaining of optimization and robotic fabrication is established, in which optimization data is driving subsequent processes solving timber joint intersections, robotically controlling member prefabrication, and spatial robotic assembly of the optimized timber structures. The implication of this concept is studied through pilot fabrication and load-testing of a full scale prototype structure.
KeywordsTopology optimization Digital fabrication Architectural robotics Advanced timber structures
The research presented in this paper was performed within a research exchange between ETH Zürich and Aarhus School of Architecture in collaboration with the NCCR Digital Fabrication MAS Programme and Israel Institute of Technology, Haifa. This research was supported by the NCCR Digital Fabrication, funded by the Swiss National Science Foundation (NCCR Digital Fabrication Agreement # 51NF40-141853). The contribution of Aarhus School of Architecture was enabled through the generous financial support of the Danish Ministry of Higher Education and Science under the Elite Research Travel Grant program.
The presented research builds directly on the research findings and developments from the ongoing SNSF research project NRP-66, established in collaboration between ETH Zürich, Bern University of Applied Science and Nolax AG. The primary constituent findings for the presented work are (a) ongoing joining experiments involving two-component, super-curing adhesives and (b) the principal process of robotic pre-sawing and spatial assembly of timber members.
In particular, the authors would warmly like to thank: Dr. Volker Helm and Dr. Jan Willmann for their helpful organizational support and discussion of research and paper content; NRP-66 collaborators Dr. Thomas Kohlhammer, Aleksandra Apolinarska and Peter Zock for fruitful discussions of analytical and structural approaches, knowledge transfer and help regarding the adhesive process; Student assistants Micha Ringer and Lazlo Blaser for their involvement in the fabrication of the prototype structure; Michael Lyrenmann for excellent photographic documentation; and Dominik Werne and the ETH HIF-Halle staff for their tireless involvement and support in the load-testing of the structure.
- Apolinarska, A, Knauss,M, Gramazio, F, Kohler, Mc. 2016, ‘The Sequential Roof’, in Menges, A (ed), Advancing Wood Architecture, Routledge,Abingdon, UK ; New York, USA.Google Scholar
- Bendsøe, MP and Sigmund, O 1999, Material Interpolation Schemes in Topology Optimization, Archive of Applied Mechanics, vol. 69, no.9-10, pp. 635–654.Google Scholar
- Dorn, W, Gomory, R and Greenberg, M 1964, Automatic Design of Optimal Structures, J de Mecanique,vol. 3, pp. 25–52.Google Scholar
- Dombernowsky, P and Søndergaard, A 2011, ‘Unikabeton prototype’, in Sheil, R and Glynn, R (eds), Fabricate: Making Digital Architecture, Riverside Architectural Press, Waterloo, CA.Google Scholar
- Dombernowsky, P and Søndergaard, A 2012, Design, Analysis and Realiza-tion of Topology Optimized Concrete Structures, International Association for Shell and Spatial Structures vol. 53, pp. 209–216.Google Scholar
- Feringa, J and Osterhuis, K 2011, ‘Investigations in Design & Fabrication at Hyperbody’, in Glynn, R and Sheil, B (eds.), Fabricate: Making Digital Architecture Riverside Architectural Press, Waterloo, CA.Google Scholar
- Gramazio, F, Kohler, M and Willmann, J 2015,‘The Robotic Touch – How Robots Change Architecture’, Park Books, Zürich, pp. 466-467.Google Scholar
- Helm, VM, Gramazio, F and Kohler, Mc. 2016, ‘Additive Robotic Fabrication of Complex Timber Structures’,in Menges, A (ed), Advancing Wood Architecture, Routledge, Abingdon, UK / New York, USA.Google Scholar
- Knippers, J and Menges, ‘A 2013, ICD/ITKE Research Pavilion 2011’, in Hu, C (ed), Architectural Material and Texture I, pp. 266–273.Google Scholar
- Michell, AGM 1904, ‘The Limit of Economy of Material in Frame Structures’, Philosophical Magazine, vol. 8, no. 6, pp. 589–597.Google Scholar
- Søndergaard, A, Amir, O, and Knauss, M 2013, ‘Topology Optimization and Digital Assembly of Advanced Space-Frame structures’, in Beesley, P, and Kahn, O (eds), Adaptive Architecture, Proceedings of the 33rd ACADIA Confe-rence 2013, Riverside Architectural Press, Waterloo. CA.Google Scholar
- Weinand, Y 2009, Innovative Timber Constructions, in Journal of the International Association for Shell and Spatial Structures, vol. 50, no. 2, pp. 111–120.Google Scholar
- Willmann, J, Gramazio, F and Kohler, M c. 2016, ‘New Paradigms of the Automatic – Robotic Timber Construction in Architecture’, in Menges, A c. 2016, Advancing Wood Architecture, Abingdon, UK / New York, USA.Google Scholar
- Zock, P, Bachmann, E, Gramazio, F, Kohler, M, Kohlhammer, T, Knauss, M, Sigrist, C and Sitzmann, S, 2014, ‘Additive robotergestützteHerstellungkomplexerHolzstrukturen’, 46, Tagungsband FortbildungskursHolzverbindungenmitKlebstoffenfür die Bauanwendung, Swiss Wood Innovation Network (S-WIN), Weinfelden, pp. 197-208.Google Scholar