The Chebydesic Pavilion - Timelapse

Описание: The Chebydesic pavilion is built on an original idea by O. Baverel, C. Douthe, C. Haskell, A. Manté and N. Montagne (thinkshell - Navier lab) and was assembled on 2021 September 6-10 during the "Construire le courbe" workshop at Ecole des Ponts ParisTech. It combines properties of Chebyshev nets and geodesic curves in an unique prototype of wooden structure.

Its construction was supported by: Ecole des Ponts ParisTech, Univ. Gustave Eiffel and Wurth France.

Design of the Chebydesic Pavilion
1. The overal shape is a Voss surface, a surface that can be covered with a geodesic network forming planar quads.
2. The structural layout has been chosen dual to this network in order to follow (as close as possible) a Chebyshev network. Chebyshev network has the wellknown property to allow for prefabrication of the grid on the ground and forming of the shape by elastic deformation of the members and shearing of the grid. This property is at the heart of previous experimentations on elastic gridshells (ENPC 2006, Solidays 2011, Créteil 2013, etc).
3. Chebyshev network do however not follow geodesic lines. The global grid was thus decomposed into independant grid patches (3mx3m) which were then optimised locally in order to get the closest geodesics.
4. The arrangement of the patches follows a nexorade like arrangement in order to insure bending continuity of the grid despite single bolt connexion between members and patches.
5. Finally, the bracing of the grid is added following one direction of the Voss network to figurate the property of the envelop.

Construction of the Chebydesic pavilion:
1. Fixing of the hinged supports and edge beams (00:00)
2a. Construction of the free edge thanks to a Vierendeel beam on the ground (00:10)
2b. Lifting of the Vierendeel beam and fixing on the supports (01:25)
3. Assembly of the side patches on supports and Vierendeel(01:40)
4. Assembly of the façades (adding laths one by one) (02:10)
5.a Independant assembly of the patches (3 laths by 3 laths)
5.b Assembly of the patches into a quasi flat grid on the ground
5.c Elastic deformation of the grid and fixing on the edges (02:20)
6. Bracing of the structure with a third direction of lath (02:35)