| 1. |
- Adiels, Emil, 1989, et al.
(author)
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The design , fabrication and assembly of an asymptotic timber gridshell
- 2019
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In: IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE. - 9788412110104 ; , s. 736-743
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Conference paper (peer-reviewed)abstract
- This paper describes and discuss the design, fabrication and assembly of an asymptotic gridshell built of plywood laths. The overall question concerns how geometry, structural action, and ecient production can interplay and inform spatial design. The environment is a two-day workshop where architects, engineers and researchers with specialization in structural and digital design cooperate with undergraduate students in a compulsory parametric design and digital fabrication course. The gridshell shape is based on an Enneper surface of threefold rotational symmetry with a boundary baseplate inscribed within a circle of 4.5 m in radius. Utilizing the concept of asymptotic curves, which are surface curves whose osculating plane coincides with the tangent plane of the surface, the structure was built using planar straight laths of plywood made using manually operated drills and saws.
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| 2. |
- Ander, Mats, 1964, et al.
(author)
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A building of unlimited height
- 2019
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In: IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE. - 9788412110104 ; , s. 1465-1472
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Conference paper (peer-reviewed)abstract
- We consider the overall buckling under own weight of a thin-walled column of circular cross-section and a radius that is a hyperbolic sine function of distance from the top of the column. The maximum stress is limited to a given value, but there is no limit to the height of the column. The wall thickness is determined by consideration of local buckling. It can be made to represent a building by adjusting the own weight of the column to include the weight of the floors, finishes, cladding and imposed load.
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| 3. |
- Hilmersson, Joel, 1992, et al.
(author)
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Isogeometric analysis and form finding for thin elastic shells
- 2019
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In: IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE. - 9788412110104 ; , s. 153-160
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Conference paper (peer-reviewed)abstract
- Recent developments within the design of shells have seen an increased interest in utilizing active bending as form giving procedure [1]. This enables complex structures to be built from simple off-the-shelf materials. However, forming bending-active structures is highly dependent on the material properties, which makes the design process reliant on either physical testing or digital simulations. An associated problem with the simulation of this behavior is the lack of integration between modeling and analysis in conventional simulation techniques, a crucial concern since the final design is always an equilibrium shape with requirements on both structural and spatial integrity. IsoGeometric analysis (IGA) is a method that aims to bridge precisely that gap between analysis and design, making it a suitable method for bending active structural design. This paper suggests an approach to the modeling and digital design of actively bent shells using the implementation of nonlinear IGA. Further on, two different ways of controlling the geometry, either by tracing the process forwards or backwards during the construction procedure are proposed. Tracing the process forwards returns an implicitly controlled shell geometry through stepwise displacement of the boundaries of a at sheet. However, as a design approach, one is often interested in explicitly controlling the final geometry by a backwards tracing. This allows the designer to start from a desired outcome and instead tailor the material to approximate this desired form. The procedure is tested in a case study where a combination of both forwards and backwards tracing is included. Both processes apply the Kirchhoff-Love shell theory [6] and uses the total Lagrangian formulation for the nonlinear computations.
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| 4. |
- Hörteborn, Erica, 1987, et al.
(author)
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Architecture from textiles in motion
- 2019
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In: IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE. - 9788412110104 ; , s. 2371-2378
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Conference paper (peer-reviewed)abstract
- Wind is one important concern when it comes to its impact on textile structures within architecture. One method to limit wind-caused displacements is to heavily pre-stress the structures. We discuss an alternative approach, in which wind is seen as a positive design parameter for architectural textiles. We explore how one could work with the shape and internal structure of the textile to design architectural structures which become kinetic volumes when airflow is applied. The implications of such a design approach are formulated based on a two-day workshop at the conference Advances in Architectural Geometry (AAG) 2018. The explorations embraced digital and physical simulations of textile behaviors arising from the presence of wind. Smart textiles, whose structures can be changed using heat, were employed to explore how the geometrical expressions of textiles under wind load can be affected through local internal textile property changes. The ambition was to investigate the possibility of dynamically altering the 3-dimensionality of the textiles by reshaping them in real-time using airflow. The main conclusion from the workshop is that the dialogue between the digital and physical simulations seems to play an important role in supporting and enhancing the process of designing the geometrical expressions of textiles subjected to dynamic influence. A combination of the digital and the physical design tools enables the creation of a unique workflow to generate architectural design typologies that would have been difficult to develop if such complementary design tools have not been employed.
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| 5. |
- Olsson, Karl-Gunnar, 1955, et al.
(author)
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Architecture and Engineering - education of Form and Force
- 2019
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In: IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE. - 9788412110104 ; , s. 145-152
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Conference paper (peer-reviewed)abstract
- Inspired by the work and attitudes of architects and engineers like Jorg Schlaich, Renzo Piano, Piero Luigi Nervi, Sverre Fehn, Ted Happold, and environments like ILEK in Stuttgart and ETH in Zurich, a vision of a new kind of architects and engineers arose at Chalmers University of Technology in the early 2000. With support from the university and the branch, a double degree Architecture and Engineering programme was developed. Since the programme started in 2006 it has been a very popular programme, and among all Swedish MSc in Engineering and Master of Architecture programmes it has almost every year been the most difficult programme to get admitted to. The concept of the programme is a 180 ects (European Credit Transfer and Accumulation System) bachelor's degree, where the fundamentals from the engineering science: mathematics, mechanics, physics and materials, is combined with history of architecture and engineering, artistic explorative courses, and the fundamentals of the architectural design process. After three years the students can choose to continue for a Master of Science in Engineering with different possible directions, from mathematics and data science to industrial ecology, acoustics, management, structural engineering, and building technology, or to continue for a Master of Architecture. For the latter they need 150 etcs minimum in pure architectural design projects. In this paper the basic concepts of the programme, the culture developed around it and the strengths we can experience in the examined students will be discussed and reflected. Today students from the programme can be found at architecture and engineering companies all over the world and are appreciated for their ability to address complex architectural and engineering design issues with attitudes, insights and skills from the both professions.
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| 6. |
- Sehlström, Alexander, 1987, et al.
(author)
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Unloaded prestressed shell formed from a closed surface unattached to any supports
- 2019
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In: IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE. - 9788412110104 ; 2019, s. 167-174
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Conference paper (peer-reviewed)abstract
- In this paper we attempt to begin to answer the question, ‘under what conditions can an unloaded shell formed of a closed surface unattached to any supports contain a state of membrane stress which can be induced by prestressing?’ We show that a sphere cannot be prestressed, but a torus can be.
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| 7. |
- Wallander, Linda, et al.
(author)
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Textile Informed Structures - How to Braid a Roof, Translating the logic of textile structure into the scale of architecture
- 2019
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In: IASS Symposium 2019 - 60th Anniversary Symposium of the International Association for Shell and Spatial Structures; Structural Membranes 2019 - 9th International Conference on Textile Composites and Inflatable Structures, FORM and FORCE. - 9788412110104 ; , s. 2756-2763
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Conference paper (peer-reviewed)abstract
- There is a great variety of textiles materials, both in terms of the behaviour of the fibres they comprise and the assembly methods used to construct them. Hence, the definition of textile is expanded nowadays from including only conventional fabrics to encompassing surfaces with structures that follows the logic of textiles.[1] One can then refer to textile as a repetition of bindings, or joints, forming a non-hierarchical surface. Analogies between classical textile assembly methods of interlacing threads (triaxial weave and bobbin lace) and architectural structural systems are explored in this research. Similar to the work of Snelson the internal structural logic is identified by the joints used, and these typologies are mapped onto structures.[2] The resulting modules aim to be used for the assembly of structures in the scale of architecture. Like the assembly logic of the textiles, these structures have the potential to grow in all directions depending on spatial requirements while still retaining some kinetic properties. Subsequently, the result proposes two concepts: firstly a tensegrity weave structural system- combining triaxial woven textiles and tensegrity; secondly a reciprocal lace system where a basic pattern of bobbin lace is mapped onto reciprocal structures. The final concepts propose intriguing load bearing systems that illustrate the possibility to design and construct temporary structures able to seamlessly span irregular spaces.
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