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Vol. 56 (2015) No. 1 March n. 183

Form-Finding and Structural Analysis for the Design of Hybrid Structures

< Table of Contents for Vol. 56 (2015) No. 1 March n. 183
  • 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. 56 (2015) No. 1 March n. 183
  • Pages: 17-24
  • Title: Form-Finding and Structural Analysis for the Design of Hybrid Structures
  • Author(s): B. Philipp, F. Dieringer, R. Wuchner and K.-U. Bletzinger
  • Keywords: tensile structures; architectural membranes; hybrid structures; bending-active; form-finding; wide-span structures
In the design of membrane structures, the integration of bending-active elements (rods) allows for interesting new designs. In classical form finding the stress-state is prescribed and equilibrium will be satisfied in the form-found geometry. In contrast, the stress-state of bending-active elements depends on their deformation. The opposing behaviors of these two types of members lead to the term “hybrid structures”. A simulation technique for these hybrid structures is presented in this paper. The necessary equations for incorporating elastic members in the form-finding and analysis of membrane structures are presented, and methods of applying the results of form-finding to the structural analysis are discussed. The necessity of incorporating elastic members from the beginning of the design process is demonstrated with small-scale examples. Finally the simulation of a 29 m umbrella that is part of an ongoing research project is used to demonstrate the possibilities and limits of accurate simulation of membrane structures with integrated bending-active elements.

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