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Vol. 49 (2008) No. 2 August n. 158


Soft Tensegrity Grid: Conceptual Design and Form-Finding

< Table of Contents for Vol. 49 (2008) No. 2 August n. 158
  • Journal Name: Journal of the International Association for Shell and Spatial Structures (J. IASS)
  • ISSN: (Electronic Version) 1996-9015
  • ISSN: (Print Version) 1028-365X
  • Issue: Vol. 49 (2008) No. 2 August n. 158
  • Pages: 77-87
  • Title: Soft Tensegrity Grid: Conceptual Design and Form-Finding
  • Author(s): B. Maurin, V. Raducanu, N. Pauli , R. Motro and A. Schacher
  • Keywords: Tensegrity grid, tensile membrane, form-finding
Abstract
A new type of tensegrity grid is presented. Its conceptual design is based on a structural composition comprising two parallel layers of tensile membrane with, in between, a woven structure of bended profiles. A prototype has been realized in order to demonstrate its feasibility. It also shows the possible adaptation of the grid to curved surfaces due to its low rigidity, “softness”, when it is not fixed. A mechanical study is achieved in order to investigate the relationship between the shape of the grid and its internal initial forces. The objective is to write the structure governing equations and, next, to propose different form-finding approaches. The form control method allows therefore to determine the tension in the membranes according to specified grid geometry. The force control strategy provides the form of the curved profiles in accordance to a required tension in the membranes. Several numerical applications, based on the prototype characteristics, are presented.

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