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IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century


IASS Symposium 2016

SESSION: Bending Active and Flexible Structures

New shapes for elastic gridshells covered by planar facets

< Table of Contents for Bending Active and Flexible Structures
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Bending Active and Flexible Structures
  • Pages: 9
  • Title: New shapes for elastic gridshells covered by planar facets
  • Author(s): Cyril Douthe, Romain Mesnil, Hugo Orts, Olivier Baverel
  • Keywords: structural morphogenesis, tchebycheff net, circular mesh, PQ-mesh, umbilicus, architectural geometry
Abstract
Elastic gridshells are structures made of flat two-way grids which are deformed elastically before they are braced and which afterwards mechanically behave like continuous shells. Gridshells present some advantages in terms of manufacturing, lightness and time of assembly. Their covering remains however a technical issue. The present article proposes hence an alternative method to cover them by planar quadrilateral facets, which could also be used as natural bracing if connected properly. It relies on the duality between a certain family of circular meshes with a unique radius and some Tchebycheff nets. The approach is versatile and allows for the design of a large variety of shapes from two curves in space. Real time numerical tools are developed for open and closed curves as well as a strategy for umbilical points.

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