Title: Scissor-hinged retractable membrane structures

Authors: Tom Van Mele, Niels De Temmerman, Lars De Laet, Marijke Mollaert

Addresses: Department of Architectural Engineering, Faculty of Engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium. ' Department of Architectural Engineering, Faculty of Engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium. ' Department of Architectural Engineering, Faculty of Engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium. ' Department of Architectural Engineering, Faculty of Engineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium

Abstract: This paper introduces scissor-hinged retractable membrane structures, a system for retractable membrane roofs that require a fully retractable supporting structure and multiple stable roof-configurations. A vaulted, foldable, supporting structure is developed consisting of two scissor-hinged frames that can retract towards opposite sides of the space below. Structural membranes are spanned in these frames in a ridge-and-valley configuration to form the roof|s outer surface. Actuators are integrated to control the tension in the membrane surface in different roof-configurations. Transformation from one configuration to another is controlled by cables running through the supporting structure over series of pulleys. The characteristics of these components are discussed, and their implementation illustrated with a design for a retractable roof over a tennis arena. The structural behaviour of this roof is analysed under representative load conditions. A procedure for such analyses using conventional software tools for the design and analysis of tensile surface structures is presented.

Keywords: retractable roofs; scissor mechanisms; retractable membrane structures; artificial muscles; structural engineering; scissor-hinged frames; structural membranes; roof configurations; tennis courts; tennis arena; tensile surface structures.

DOI: 10.1504/IJSTRUCTE.2010.033489

International Journal of Structural Engineering, 2010 Vol.1 No.3/4, pp.374 - 396

Published online: 02 Jun 2010 *

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