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


IASS Symposium 2016

SESSION: Metal Spatial Structures

Influence of Connection Stiffness and of Imperfections on the Stability of a Grid Shell

< 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: 9
  • Title: Influence of Connection Stiffness and of Imperfections on the Stability of a Grid Shell
  • Author(s): Christian Stutzki, John Knowles, David Miklosi
  • Keywords: gridshells, stability, connections
Abstract
This presentation is about the robustness vs. sensitivity of two grid shells currently under construction. The stability of grid shells is influenced by many factors, like slenderness of the members, shallowness of the overall geometry, building tolerances, stiffness of boundary conditions, bending capacity of connections, and loads. This concept is applied to the current grid shell even though the shapes are not perfect spherical domes but domes with elliptical footprint. The connection technology is discussed in depth, and how additional bending stiffness of the connections reduces the sensitivity, and increases the robustness and the reliability. The connection technology, in form of bolted connections between the beam-type members and the nodes has a beneficial impact of construction cost and construction time, as will be shown in detail. The detail design of the connection is also discussed in view of low-cycle fatigue, a frequent reason for failures of buildings in seismic areas.

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