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Vol. 48 (2007) No. 2 August n. 154

Arch-Supported Tensile Structures with Very Long Clear Spans

< Table of Contents for Vol. 48 (2007) No. 2 August n. 154
  • 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. 48 (2007) No. 2 August n. 154
  • Pages: 89-98
  • Title: Arch-Supported Tensile Structures with Very Long Clear Spans
  • Author(s): K. Hincz
  • Keywords: arches, cables, tension structures, suspended structures.
This paper introduces special arch-supported tensile structures, based on a new invention, which makes possible building structures with clear spans longer than allowed by existing technologies. The invention converts random roof loads (wind and snow) into uniform, symmetric arch loads using a unique suspension system, based on the well known principle of block and tackle. The bending moment in the supporting arches can be minimized by using this suspension system. Procedures developed by the author make possible to analyse arch-supported tension structures with this special suspension system numerically. The main steps of the numerical analysis of such structures are topology generation, determination of the theoretical shape of the membrane or cable net (an equilibrium shape that corresponds to a required stress-distribution), determination of the “real” construction shape (that corresponds to member lengths, material constants and prestress in the suspension cables), and load analysis. Dynamic relaxation-based procedures developed for these stages of the analysis are introduced briefly. Numerical examples are presented to answer questions about the usefulness of the system. The results of the nonlinear analysis show that the invention can be effective in minimizing moments in the supporting arches.

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