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


IASS Symposium 2016

SESSION: Form Finding & Optimization

Step-by-step stability analysis of shallow grid shells: Buckling versus snap-through

< Table of Contents for Form Finding & Optimization
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Form Finding & Optimization
  • Pages: 10
  • Title: Step-by-step stability analysis of shallow grid shells: Buckling versus snap-through
  • Author(s): Amedeo Manuello, Fabio Bazzucchi, Alberto Carpinteri
  • Keywords: snap-through, grid shell, Eulerian buckling, slender structures, roof instability
Abstract
Different methods, physical and mathematical, were used to find the shape minimizing the internal stresses of shallow grid shells. Because of their original organic shape, the design of grid shell structures challenges architects and structural engineers in more than one way. The form-finding generally adopted (optimization techniques, genetic algorithms etc.) leads to the definition of a particular shape in which the stresses are minimized for a certain loading configuration. In this way, the same structural scheme may be affected by instability problems, even up to the collapse. In the present paper, the grid shells, obtained by the form-finding of suspended 3D models, are analyzed according to snap-through instability and to the Eulerian buckling effect. In this way, the interaction phenomena between the two local and non local equilibrium paths of the structures are analyzed according to particular slenderness and shallowness ratios showing a snap-back instability of the grids.

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