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


IASS Symposium 2016

SESSION: Metal Spatial Structures

Buckling behavior of two-way single layer lattice dome stiffened by diagonal braces

< Table of Contents for Metal Spatial Structures
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Metal Spatial Structures
  • Pages: 10
  • Title: Buckling behavior of two-way single layer lattice dome stiffened by diagonal braces
  • Author(s): Takayuki Iwamoto, Shiro Kato, Shoji Nakazawa
  • Keywords: metal spatial structures, lattice shells, single layer, elasto-plastic buckling, two-way, diagonal stiffening, non-uniform snow
Abstract
The present study focuses on a two-way lattice dome stiffened by diagonal braces aiming to grasp elasto-plastic buckling behaviour of the dome under dead and non-uniform snow loads assuming that it is supported elastically by roof eaves and substructures. The results reveal the following characteristics.The eaves around the lattice dome provided as a tension ring are much effective to secure the sufficient horizontal stiffness in order to avoid excessive stresses in the diagonal braces, resulting in increase of buckling strength. The diagonal braces of even a small sectional area at the central region of the dome work aplendidly to upgrade the buckling strength. At the initial loading stage, the diagonal braces will not work for vertical loadings, however, these braces begin to bear tensile stresses on account of shear deformation appearing after large displacements in the dome and effectively upgrade the buckling performance.

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