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


IASS Symposium 2016

SESSION: Tension & Membrane Structures

Stability of Cable-stayed Masts in Tensioned Fabric Structures

< Table of Contents for Tension & Membrane Structures
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Tension & Membrane Structures
  • Pages: 6
  • Title: Stability of Cable-stayed Masts in Tensioned Fabric Structures
  • Author(s): Sudarshan Krishnan
  • Keywords: cable-stays, cross-arms, stayed-mast, column, stiffness, buckling, symmetric, anti-symmetric
Abstract
Stayed-columns or masts have found application in both flexible and rigid structures. Tensioned fabric structures use them as the principal compression members to provide equilibrium to the high tension forces from fabric membrane and cables. The stiffness of a mast has to be large enough to overcome instability due to buckling. The transformation of a tube section by adding cross-arms and prestressed stays substantially increases the load-carrying capacity of tall and slender masts. The use of cables, the presence of prestress and inherent nonlinearities, all contribute to the intricate behaviour of stayed-masts. For some stayed-masts, the anti-symmetric (or two-lobe) mode may govern design, which is uncharacteristic when compared to regular column design. There is still a lot to be learned, recognized and understood about the behaviour of stayed masts. By understanding their behaviour, structural designers can benefit from using a lightweight compression member with enhanced strength and stiffness.

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