17 results on '"nexorade"'
Search Results
2. Flexible digital manufacturing of timber construction: the design and fabrication of a free-form nexorade
- Author
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Mesnil, Romain, Gobin, Tristan, Demont, Leo, Margerit, Pierre, Ducoulombier, Nicolas, Douthe, Cyril, and Caron, Jean-François
- Published
- 2023
- Full Text
- View/download PDF
3. Reciprocal Frames Algorithm based on Symmetry Groups.
- Author
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Castriotto, Caio, Celani, Gabriela, and Tavares, Felipe
- Subjects
SYMMETRY groups ,RAPID prototyping ,ALGORITHMS ,GEOMETRIC modeling ,WALLPAPER - Abstract
Reciprocal Frames (RF) are a type of structural system that can be used to build temporary structures with large spans. This is possible due their ease of assembly and the use of relatively short, light-weight elements. However, a challenge is presented when this kind of structure is applied to complex surfaces. In this case, the only way to figure out each connection is through an algorithmic geometric model. Only a few algorithms have already been developed for generating complex RF structures, but they still have some limitations. In this paper we present a new approach represent RF geometry, based on symmetry theory, combining pinwheel patterns with wallpaper symmetry groups. In future works, this will be combined with structural performance analysis and the use of digital fabrication methods for producing the structures' connections. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
4. Form Finding of Nexorades Using the Translations Method
- Author
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Gobin, Tristan, Mesnil, Romain, Douthe, Cyril, Margerit, Pierre, Ducoulombier, Nicolas, Demont, Leo, Delmi, Hocine, Caron, Jean-François, Willmann, Jan, editor, Block, Philippe, editor, Hutter, Marco, editor, Byrne, Kendra, editor, and Schork, Tim, editor
- Published
- 2019
- Full Text
- View/download PDF
5. Concevoir et construire une structure réversible grâce aux assemblages non-séquentiels
- Author
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Glath Julien, Barazzutti Vincent, Bayard Antoine, Leveque Gaspard, Peka Sosava, Senlis Lancelot, Thieffry Paul, Mimram Marc, and Baverel Olivier
- Subjects
non-séquentiel ,assemblage ,cinématique ,nexorade ,réversible ,fabrication digitale ,Social Sciences - Abstract
Face à la diminution des ressources et afin de réduire l’impact carbone du secteur de la construction, il est important d’envisager la fin de vie des bâtiments. Il faut considérer les constructions et leur structure comme des éléments pouvant être démontés ou désassemblés pour être recyclés ou réutilisés. Cette recherche s’intéresse aux assemblages non-séquentiels, permettant une réversibilité pour répondre à ces enjeux. Pour démontrer l’intérêt de ces assemblages, un prototype de Nexorade échelle 1 a été construit et illustre l’article. La première partie définit l’assemblage non-séquentiel et ses cinématiques possibles. La recherche du pavage et de la géométrie sont évoquées dans la seconde partie. L’article continue sur la génération de la nexorade et son analyse mécanique mettant en évidence l'intérêt d’incliner les poutres de la nexorade, pour réduire la flèche de 35%. La séquence d’assemblage est développée dans la partie 5. Enfin, la construction du pavillon est détaillée, permettant le passage d’un modèle numérique à la fabrication du prototype. Pour conclure cet article, les auteurs discutent des résultats obtenus sur les assemblages non-séquentiels et sur l’inclinaison des poutres. Des extensions possibles et futures recherches sont suggérées.
- Published
- 2022
- Full Text
- View/download PDF
6. Nexorades : a family of interwoven space structures
- Author
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Baverel, Olivier L. S.
- Subjects
624.1 ,Nexor ,Nexorade - Published
- 2000
7. Integrated Design and Robotized Prototyping of Abeille’s Vaults
- Author
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Schwartz, Thibault, Mondardini, Lucia, McGee, Wes, editor, and Ponce de Leon, Monica, editor
- Published
- 2014
- Full Text
- View/download PDF
8. Form finding of nexorades using the translations method.
- Author
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Mesnil, Romain, Douthe, Cyril, Baverel, Olivier, and Gobin, Tristan
- Subjects
- *
GEOMETRICAL constructions , *EUCLIDEAN geometry , *RECIPROCITY theorems , *ROBOTICS , *AUTOMATION , *INDUSTRIALIZED building - Abstract
Abstract This article proposes a new computational method for the form-finding of nexorades, also called reciprocal frames in the literature. The method is based on the translations of members forming the initial layout. It is shown that the two geometrical quantities defining nexorades - eccentricity and engagement length - depend linearly on the transformation parameters. The method introduced in this article is thus based on linear algebra, so that fitting problems can be formulated as simple quadratic optimisation problems under linear constraints. The proposed method is therefore fast, simple to implement, robust and can be applied to various grid patterns. Furthermore, the proposed framework preserves planar facets. This paper proposes thus a new structural system where the nexorade is braced by planar facets. The feasibility of this structural system and of the computational framework introduced in this article is demonstrated by the fabrication of a 50 m2 timber pavilion. Highlights • A new form finding approach for nexorades is proposed. • The form finding is based on translation of members. • The influence of design parameters is discussed with numerous examples. • The resulting structures can be covered with planar panels which can be used as bracing components. • An experimental prototype demonstrates the potential of the form finding technique. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
9. Form finding of nexorades using the translations method
- Author
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Olivier Baverel, Romain Mesnil, Cyril Douthe, Tristan Gobin, Laboratoire Navier (navier umr 8205), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS), Matériaux et Structures Architecturés (msa), and Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Constructive geometry ,planar meshes ,Fabrication ,shell-nexorade hybrid ,Computer science ,Structural system ,0211 other engineering and technologies ,Mechanical engineering ,020101 civil engineering ,02 engineering and technology ,0201 civil engineering ,robotic timber construction ,Machining ,021105 building & construction ,reciprocal structure ,non-standard structures ,form-finding ,Civil and Structural Engineering ,Space exploration ,Mobile robot ,Building and Construction ,reciprocal frame ,Bracing ,Control and Systems Engineering ,Structure based ,nexorade ,[SPI.GCIV.STRUCT]Engineering Sciences [physics]/Civil Engineering/Structures ,Reciprocal - Abstract
International audience; This article proposes a new computational method for the form-finding of nexorades, also called reciprocal frames in the literature. The method is based on the translations of members forming the initial layout. It is shown that the two geometrical quantities defining nexorades-eccentricity and engagement length-depend linearly on the transformation parameters. The method introduced in this article is thus based on linear algebra, so that fitting problems can be formulated as simple quadratic optimisation problems under linear constraints. The proposed method is therefore fast, simple to implement, robust and can be applied to various grid patterns. Furthemore, the proposed framework preserves planar facets. This paper proposes thus a new structural system where the nexorade is braced by planar facets. The feasibility of this structural system and of the computational framework introduced in this article is demonstrated by the fabrication of a 50m 2 timber pavilion.
- Published
- 2018
10. Free-form structures from topologically interlocking masonries
- Author
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Olivier Baverel, Jean-François Caron, Romain Mesnil, Vianney Loing, Laboratoire Navier (NAVIER UMR 8205), and École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel
- Subjects
Constructive geometry ,Computer science ,Process (engineering) ,Topologically interlocked material ,0211 other engineering and technologies ,020101 civil engineering ,02 engineering and technology ,0201 civil engineering ,Parametric design ,Development (topology) ,021105 building & construction ,Interlocking ,Civil and Structural Engineering ,business.industry ,Robotics ,Building and Construction ,Structural engineering ,Masonry ,[INFO.INFO-IA]Computer Science [cs]/Computer Aided Engineering ,[SPI.MECA.STRU]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of the structures [physics.class-ph] ,Architectural geometry ,Control and Systems Engineering ,Free-form ,Formwork ,nexorade ,Artificial intelligence ,PQ-mesh ,[SPI.GCIV.STRUCT]Engineering Sciences [physics]/Civil Engineering/Structures ,business - Abstract
International audience; The paper presents new results about the geometry of topological interlocking masonries and some possibilities they present to build without formwork. Construction without the use of formwork may be an important issue concerning both productivity increase and decreasing of waste generated on a construction site. Due to the development of computational design and robotics in the construction industry, it makes sense to (re)explore innovative design and process of complex masonry structures. The design of this kind of masonry is standard for planar structures, and in this paper, a generalization is proposed for the parametric design of curved structures. To achieve this, a criterion for translationally interlocked structure based on quadrilateral meshes is exhibited. The application of this criterion is then extended to masonry structures derived from other patterns. Physical prototypes of topological interlocking masonry are also presented. One of these designs seems to allow construction without formwork.
- Published
- 2020
11. Analytical Investigations on Elementary Nexorades.
- Author
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Sénéchal, B., Douthe, C., and Baverel, O.
- Subjects
- *
SPACE frame structures , *TECHNOLOGICAL complexity , *POLYHEDRA , *ANALYTIC geometry , *DIMENSIONING of engineering drawings , *ARCHITECTURE - Abstract
Nexorades or reciprocal frames can be seen as a practical way to reduce the complexity of connections in spatial structures by connecting reciprocally the members by pairs. This reduction of the technological complexity of the connections is however replaced by a geometrical complexity due to numerous compatibility constraints. The purpose of this article is to make explicit these constraints for elementary structures and to solve analytically the resulting system of equations. Applications to regular polyhedrons are presented and a practical realization (a 3 m high dodeca-icosahedron) is shown. In the brief conclusion, perspectives for complementary analytical developments for spatial structures are drawn forth. [ABSTRACT FROM AUTHOR]
- Published
- 2011
12. Behavior of a Simple Nexorade or Reciprocal Frame System.
- Author
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Gelez, Simon, Aubry, Simon, and Vaudeville, Bernard
- Subjects
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STRUCTURAL frames , *CONFIGURATIONS (Geometry) , *GEOMETRIC shapes , *BENDING (Metalwork) , *STIFFNESS (Engineering) , *ROBUST control - Abstract
Among the family of space structures is a typology called nexorades or reciprocal frame structures. Nexorades can have various configurations and shapes. This article focuses on a simple configuration to obtain results that are easy to read and communicate. The aim is to get a better understanding of the structural behavior of nexorades to facilitate their design.Two analytical methods are proposed to calculate the bending resistance and the stiffness of a nexorade. The influence of the connections between members on the structural behavior and the robustness is studied. A comparison is made with flat grids. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
13. Nexorade or Reciprocal Frame System Applied to the Design and Construction of a 850 m2 Archaeological Shelter.
- Author
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Gelez, Simon, Aubry, Simon, and Vaudeville, Bernard
- Subjects
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SPACE frame structures , *STRUCTURAL design , *ARCHAEOLOGICAL excavations , *ALUMINUM , *MODULAR design ,BIBRACTE (Extinct city) - Abstract
There are many ways of covering a surface. This paper describes the solution adopted for a prototype of an archaeological excavation shelter in Bibracte, France. A nexorade or reciprocal frame system covered with fabric has been designed by French architect Paul Andreu and French engineers Bernard Vaudeville and Simon Aubry (RFR first stage and T/E/S/S second stage). The shelter was built in 2008 and is currently in use. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
14. Design of nexorades or reciprocal frame systems with the dynamic relaxation method
- Author
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Douthe, C. and Baverel, O.
- Subjects
- *
STRUCTURAL frames , *STRUCTURAL analysis (Engineering) , *LATTICE theory , *MECHANICAL behavior of materials , *RELAXATION methods (Mathematics) , *ALGORITHMS , *NONLINEAR statistical models - Abstract
Abstract: The objective of this paper is to propose a simple method using dynamic relaxation algorithm to find the form and perform a structural analysis of reciprocal frame systems, also called nexorades. After a brief historical note, details of the parameters that govern the design of nexorades are introduced together with details of the assembly. These parameters induce strong geometrical constrains on this kind of structures so that a form-finding step is required. It is suggested here to introduce a fictitious mechanical behaviour to solve this problem. The dynamic relaxation algorithm is used with a model that takes into account the eccentricity between the elements. Its implementation is explained and its versatility is illustrated through several examples covering various fields of applications going from form-finding problems to non-linear structural analysis of structures. In a last example the structural behaviour of nexorades is compared with more conventional triangulated structures. [Copyright &y& Elsevier]
- Published
- 2009
- Full Text
- View/download PDF
15. Form finding and design of a timber shell-nexorade hybrid
- Author
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Mesnil, Romain, Douthe, Cyril, Gobin, Tristan, Baverel, Olivier, Laboratoire Navier (navier umr 8205), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS), Matériaux et Structures Architecturés (msa), and Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
form finding ,Shell-nexorade hybrid ,PQ-mesh ,[SPI.GCIV.STRUCT]Engineering Sciences [physics]/Civil Engineering/Structures ,Nexorade ,timber structure ,marionette technique - Abstract
International audience; The aim of this paper is to discuss the form-finding of an innovative structural system through the design and construction of a full-scale timber pavilion. Nexorades, or multi-reciprocal grids, are structures where members support each other along their spans. This structural principle allows simple assembly and connection details, but leads in counterpart to poor structural performance. Introducing planar plates as bracing components solves this issue, but result in a complex and intricate geometry of the envelope and supporting structure. This paper discusses the different challenges for the designers of shell-nexora-de hybrids and algorithmic framework to efficiently handle them in a project workflow.
- Published
- 2018
16. Design and construction of a shell-nexorade hybrid timber structure
- Author
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Douthe, Cyril, Mesnil, Romain, Baverel, Olivier, Gobin, Tristan, Tellier, Xavier, Ducoulombier, Nicolas, Montagne, Nicolas, Laboratoire Navier (navier umr 8205), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS), Matériaux et Structures Architecturés (msa), and Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
form finding ,timber pavilion ,PQMesh ,robotised manufacturing ,Nexorade ,reciprocal frame ,3Dphotogrammetry ,[SPI.MECA.STRU]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of the structures [physics.class-ph] ,[SPI.AUTO]Engineering Sciences [physics]/Automatic - Abstract
International audience; This paper presents the design and fabrication of an innovative structure, spanning 6.5m with a structural thickness of 12cm. The structural system derives from nexorades, also called reciprocal frames by some authors, obtained by a novel form-finding method based upon translation of the edges. It also allows for the covering with planar facets if the geometry before transformation is covered with planar facets. This property is used for the pavilion, covered with planar timber panels used as bracing elements. The benefit of this structural system, called shell-nexorade hybrid is discussed through a comparative study between the braced and un-braced nexorade (the stiffness is multiplied by ten adding only 30% mass). Finally, the fabrication process, achieved through robotized milling of the beams, is shown, illustrating the potential of pluri-disciplinary approach for conceptual design.
- Published
- 2018
17. Free-form structures from topologically interlocking masonries.
- Author
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Loing, Vianney, Baverel, Olivier, Caron, Jean-François, and Mesnil, Romain
- Subjects
- *
MASONRY , *BUILDING sites , *CONSTRUCTION industry , *ROBOT industry , *GENERALIZATION - Abstract
The paper presents new results about the geometry of topological interlocking masonries and some possibilities they present to build without formwork. Construction without the use of formwork may be an important issue concerning both productivity increase and decreasing of waste generated on a construction site. Due to the development of computational design and robotics in the construction industry, it makes sense to (re)explore innovative design and process of complex masonry structures. The design of this kind of masonry is standard for planar structures, and in this paper, a generalisation is proposed for the parametric design of curved structures. To achieve this, a criterion for translationally interlocked structure based on quadrilateral meshes is exhibited. The application of this criterion is then extended to masonry structures derived from other patterns. Physical prototypes of topological interlocking masonry are also presented. One of these designs seems to allow construction without formwork. • The context of the work concerns the development of robotics in construction. • The focus is set on complex masonry structures, and topological interlocking systems. • A new design criterion, for translational interlocked free-form structures is proposed. • This criterion is used to design masonry structures constructible without formwork. • Experimental prototype results are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
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