Form-driven design of a bending-active tensile façade system

2020 ◽  
Vol 35 (4) ◽  
pp. 174-190
Author(s):  
Léa Boulic ◽  
Pierluigi D’Acunto ◽  
Federico Bertagna ◽  
Juan José Castellón

This article highlights the design potentials of a recently proposed form-driven approach for bending-active tensile structures, in which the geometry of the actively bent elements can be directly defined without the recourse to a form-finding procedure. The approach is applied to the design of a lightweight sun-shading system that can be used to protect glazed building façades, and in which actively bent beams are restrained by pre-stressing strips. Other than structural requirements, the geometry of this hybrid structure is informed by functional and environmental considerations to prevent overheating and glare inside the building.

2019 ◽  
Vol 23 (7) ◽  
pp. 1259-1275
Author(s):  
Rasoul Asghari ◽  
Karim Abedi ◽  
Mohammad Reza Chenaghlou

Cable domes obtain their stability through the boundary compression ring that contradicts the free-standing principle of tensegrities. Replacement of that with a tensegrity ring has recently attracted the attention of researchers. In this study, form-finding of a modified hybrid structure consisting of a tensegrity ring and a Levy cable dome has been presented. Two groups of different configurations with two different arrangements of modules in tensegrity ring and also two connecting methods between the ring and cable dome parts were considered in the hybrid structures. Since the distribution of pre-stress forces is a fundamental issue in structural behavior, the proximity of pre-stress force values between two parts of ring and cable dome was chosen as comparison criterion. The form-finding of a variety of hybrid cases was carried out and results were compared with the previously proposed hybrid structure and with each other to achieve the best combination method between two parts. It was found that the hybrid cases proposed in this study have a very better pre-stress force distribution and finally the best hybrid structure also was presented.


Author(s):  
Mario Seixas ◽  
Luís Eustáquio Moreira ◽  
Patrick Stoffel ◽  
João Bina

This paper presents the form finding and structural analysis of an active bending-pantographic bamboo space structure that integrates self-stressed active bending arches, tensile pantographic grids and supporting bipods. The structure was designed to roof an open-aired amphitheater in the tropical climate. The structure has a self-supporting behavior and a mobile assembly procedure, applying the hinged flexible connection (HFC) mechanism. The structure was developed initially through small-scale physical models, then, on computer models and full-scale prototypes. Empirical models were used to determine the minimum bending radius of the arches and served to embed data for the computer models. The active bending arch (ABA) applied Phyllostachys aurea bamboo rods subjected to axial loads up to the elastic limit of strain on the beams. Steel cables and diagonal rods were connected to the curved beams, avoiding buckling in the plane of the arches. Modular pantographic grids were deployed over the ABA, generating double curved space frames with free-form geometries. The coupling of active bending arches and pantographic grids resulted in a hybrid structure, with mutual operation of bending-active and form-active structural modules. The developed structure used bio-based materials for a sustainable engineering design, with lightweight techniques and low-carbon footprint.


2017 ◽  
Vol 12 (11) ◽  
pp. 913-915 ◽  
Author(s):  
Sunao Murakami ◽  
Daisuke Ishihara ◽  
Masateru Araki ◽  
Naoto Ohira ◽  
Takahiro Ito ◽  
...  
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2020 ◽  
Vol 7 (2) ◽  
pp. 272-282
Author(s):  
Vadim Viktorovich Dementyev

The transformation of scientific genres in the context of the general digitalization of modern culture is considered. It is shown that the speech genre content of this process is based on the mechanisms of generation and transformation of the text of two types, the interpretation of which can be useful in order to better understand the nature, tasks and tools of scientometry at this stage, and in order to better understand the speech genre structure of scientific speech. Firstly, the structural requirements for articles and monographs indexed in scientometric systems (Scopus, WoS, DOAJ, RSCI, etc.) are approved and streamlined, and thereby our knowledge of what an article is from its structure (i.e. knowledge about the genre of the article). Secondly, the requirements of indexing systems lead to the fact that the texts of articles change, they are “written differently”, and sometimes redone after appropriate recommendations from publishers. The points highlighted in scientometric systems can be understood as signs that an article must comply with in order to be assigned to the “speech genre of a scientific article”. The largest quantitative indicators for these items are indicators of how close to the core of the genre this or that text will turn out.


2008 ◽  
Vol 17 (3) ◽  
pp. 508-509
Author(s):  
Weng Dagen ◽  
Zuo Shaobing ◽  
Lu Xilin

2018 ◽  
Vol 83 (753) ◽  
pp. 851-860
Author(s):  
Yuhei NISHIO ◽  
Takafumi NOGUCHI ◽  
Hideki YOSHIOKA ◽  
Manabu KANEMATSU

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