Advertisement

Modelling Workflow for Segmented Timber Shells Using Wood-Wood Connections

  • Petras VestartasEmail author
  • Nicolas Rogeau
  • Julien Gamerro
  • Yves Weinand
Conference paper
  • 544 Downloads

Abstract

This paper presents a modelling method based on planarization for double-curved segmented timber shell made from quad polygons and assembled by wood-wood connections. The inspiration is taken from timber dome structures [1, 2], where solid timber walls were built from planks, connected side by side. Furthermore, the research is based on a collaboration with a local timber company located in a mountain area. In this context, timber has a low economic value because the price no longer covers the harvesting costs [3]. Therefore, there is a need to explore the available timber stock (round wood, beam elements and planks) to transform it locally. The geometry modelling workflow is split into three parts: surface discretization, joint modelling and fabrication. Firstly, projection-based solver is applied to the planarization of volumetric blocks. Secondly, the joint geometry is computed according to the insertion vector and a tool-path is generated using G-Code [4] to guide the 4.5 Axis CNC machining. As proof of concept, two prototypes were built, one from planks and another from round-woods. The choice of material influenced the segmentation of the timber shell. Finger and Tenon-mortise joinery techniques have been chosen for their simple modelization and fast cutting time. Their placement follows as closely as possible fiber orientation of wood. Even if both study cases share the same discretization method, the first prototype from timber plates takes advantage of lightweight structures, while the second explores a heavy solid round-wood structural system.

Keywords

Discrete polygons Planarization Segmentation Timber shell Wood-wood connections 

References

  1. 1.
    Philibert, D.: Illustrations de Nouvelles inventions pour bien bastir et a petits fraiz 1561Google Scholar
  2. 2.
    Barbara, M.: Wooden Domes - History and Modern Times-Springer 2018. Springer, Cham (2018)Google Scholar
  3. 3.
    Luthi, S., Remy, C., Miklos, I.: Plan de Gestion des Forets Communales de Rossiniere. 4eme arrondissement forestier, Canton de Vaud (2008)Google Scholar
  4. 4.
    ISO 6983-1:2009: Automation systems and integration—Numerical control of machines—Program format and definitions of address words—Part 1: Data format for positioning, line motion and contouring control systemsGoogle Scholar
  5. 5.
    Pottmann, H., Jiang, C., Hobinger, M., Wang, J., Bompas, P., Wallner, J.: Cell packing structures. Comput.-Aided Des. (2015).  https://doi.org/10.1016/j.cad.2014.02.009
  6. 6.
    Rippmann, M., Van Mele, T., Popescu, M., Augustynowicz, E., Echenagucia, T.M., Barentin, C.C., Frick, U., Block, P.: The armadillo vault computational design and digital fabrication of a freeform stone shell. In: Advances in Architectural Geometry, pp. 344–363 (2016).  https://doi.org/10.3218/3778-4_23
  7. 7.
    Robeller, C., Konakovic, M., Dedijer, M., Pauly, M., Weinand, Y.: A double-layered timber plate shell - computational methods for assembly, prefabrication, and structural design. In: Advances in Architectural Geometry (2016).  https://doi.org/10.3218/3778-4_9
  8. 8.
    Schiftner, A., Hobinger, M., Wallner, J., Pottman, H.: Packing circles and sphere on surfaces. In: SIGGRAPH Asia 2009 Papers Article No. 139 (2009)Google Scholar
  9. 9.
    Liu, Y., Pottmann, H., Wallner, J., Yang, Y.-L., Wang, W.: Geometric modeling with conical meshes and developable surfaces. ACM Trans. Graph. 25(3), 681–689 (2006). ACM SIGGRAPHGoogle Scholar
  10. 10.
    Wang, Z., Song, P., Pauly, M.: DESIA: a general framework for designing interlocking assemblies. ACM Trans. Graph. (2018). (Proceedings of SIGGRAPH Asia)Google Scholar
  11. 11.
    Yao, J.X., Kaufman, D.M., Gingold, Y., Agrawala, M.: Interactive design and stability analysis of decorative joinery for furniture. ACM Trans. Graph. (TOG) 36(2) (2017). (Presented at SIGGRAPH 2017)Google Scholar
  12. 12.
    Fu, C.-W., Song, P., Yan, X., Yang, L.W., Jayaraman, P.K., Cohen-Or, D.: Computational interlocking furniture assembly. ACM Trans. Graph. SIGGRAPH 34(4) (2015). Article No. 91Google Scholar

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Petras Vestartas
    • 1
    Email author
  • Nicolas Rogeau
    • 1
  • Julien Gamerro
    • 1
  • Yves Weinand
    • 1
  1. 1.EPFL ENAC IIC IBOISLausanneSwitzerland

Personalised recommendations