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Communication Dans Un Congrès Année : 2021

The Baya Nest pavilion project: braided pattern optimization for hanging shell structures by dynamic relaxation

Résumé

Through the study of the Baya's weaverbird nest, we carried out our research on the braided hanging shells. It is a new experimental structure that is effective in terms of low use of materials. We developed a parametrical dynamic relaxion solution to calculate principal fields of stress on every type of the hanging shell project. Thanks to experimental measurements and another dynamic relaxation algorithm that takes into account bending forces due to the braiding process, we developed a law which define a relation between density and orientation of the stems and the fields of principal stresses on an idealized continuous surface: "each field of stress is related to an optimal braiding". The apparent complexity of this method makes it restricted to researchers and engineers, thus also making it inaccessible to architects. Therefore, we sought to adapt our algorithm, making it accessible and easy to use for architects and practitioners. The goal of this project is to make those concepts understandable for a group of architecture students and to build from scratch the set of necessary tools for the calculation, braiding optimization, designing, and fabrication of a human-scale braided hanging pavilion; allowing us to connect theoretical and practical fields. In order to popularize those notions, we engaged in three different activities: • The development of a complete, generic, open-source and ergonomic algorithm, usable by all, for optimization of braided hanging shell using dynamic relaxation. • The publication in La Villette editions of a collective book that compiles our study and the historical, scientific and conceptual knowledge over this subject in a pedagogic way, co-written with the master cycle students. • The practical application of our study with the construction of a full-scale public pavilion hanging from trees in partnership with the municipality of Paris on the belvedere of the Butte du Chapeau Rouge park (Paris XIX).
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Dates et versions

hal-03882301 , version 1 (02-12-2022)

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  • HAL Id : hal-03882301 , version 1

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Marc Leyral, Quentin Chef, Sylvain Ebode, Pierre Guerold. The Baya Nest pavilion project: braided pattern optimization for hanging shell structures by dynamic relaxation. IASS Annual Symposium 2020/21 - 7th International Conference on Spatial Structures - "Inspiring the Next Generation", Aug 2021, Surrey, United Kingdom. ⟨hal-03882301⟩

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