Abstract
Double-layer tensegrity grids (DLTGs) are tensegrity spatial systems containing two parallel networks of members in tension forming the top and bottom chords, whose nodes are linked by vertical and/or inclined web members under compression and tension. This paper presents, as an introduction, a brief perspective of the historical proposals for DLTGs over the last years, describing later a new approach for generating these kinds of structures, mainly in geometrical terms. After applying Otero’s proposal for designing conventional double-layer grids (DLGs), a new technique, known as Rot-Umbela Manipulation, is applied to their upper and/or lower layers for generating DLTGs. Rot-Umbela Manipulation consists of opening a vertex in the plane for obtaining a certain polygon, which is then rotated by a determined angle. This powerful operation opens an endless catalogue of DLTGs and a very interesting line of research in the field of Tensegrity.
Highlights
This paper presents, as an introduction, a brief perspective of the historical proposals for Double-layer tensegrity grids (DLTGs) over the last years, describing later a new approach for generating these kinds of structures, mainly in geometrical terms
C.: “Analysis of clustered tensegrity structures using a modified dynamic relaxation algorithm”. (84) Averseng, J.; Jérome Quirant; Jean-Francois Dubé: “Interactive Design And Dynamic Analysis Of Tensegrity Systems”, presentado en Structural Engineers World Congress 2011, Como (Italy), 2011. (85) Tibert, G.: “Design And Form-Finding Analysis Of Tensegrity Power Lines”, presentado en Structural Enginners World Congress 2011, Como (Italy), 2011. (86) Murcia, J.: “Tecnología de pasarelas con estructura de membrana”, Informes de la Construcción, vol 59, no 507 (2007), pp. 21-31
Summary
Double-layer tensegrity grids (DLTGs) are tensegrity spatial systems containing two parallel networks of members in tension forming the top and bottom chords, whose nodes are linked by vertical and/or inclined web members under compression and tension. This paper presents, as an introduction, a brief perspective of the historical proposals for DLTGs over the last years, describing later a new approach for generating these kinds of structures, mainly in geometrical terms. After applying Otero’s proposal for designing conventional double-layer grids (DLGs), a new technique, known as Rot-Umbela Manipulation, is applied to their upper and/or lower layers for generating DLTGs. Rot-Umbela Manipulation consists of opening a vertex in the plane for obtaining a certain polygon, which is rotated by a determined angle. Rot-Umbela Manipulation consists of opening a vertex in the plane for obtaining a certain polygon, which is rotated by a determined angle This powerful operation opens an endless catalogue of DLTGs and a very interesting line of research in the field of Tensegrity.
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