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


IASS Symposium 2016

SESSION: Tension & Membrane Structures

Tensegric membrane structure with radiated struts

< 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: 10
  • Title: Tensegric membrane structure with radiated struts
  • Author(s): Yi-Hsuan Tu, Chia-Ho Lin
  • Keywords: tensegrity, mem brane, pre-stress, dome
Abstract
The geometrical characteristics and the mechanics of the tensegric membrane system with parallel struts are studied in this paper. It was found that the spacing between parallel struts decreases as the membrane curves from a plane to a vault. Tension occurs in the membrane when the decrease is restrained. Therefore, the pre-tension in the membrane and the force equilibrium can be derived from the final rotation angle and the incremental rotation angle with a given strut arrangement. The relationships between the pre-stress and the strut length, spacing, overlap ratio, number, and the final rotation angle were studied. It was found that the pre-stress significantly decreases as the strut number increases. In order to simplify the pre-stress application, a torus dome with radiated struts that enables a concentrated pre-stressing mechanism at the center was proposed. Non-stretch waterproof fabric was used as the membrane material, and a half-scaled model was designed and built.

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