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بهرهگیری از الگوهای طبیعت برای طراحی ساختارهای تغییرپذیر خمشو در معماری | ||
| نشریه هنرهای زیبا: معماری و شهرسازی | ||
| مقاله 6، دوره 20، شماره 1، فروردین 1394، صفحه 67-80 اصل مقاله (968.61 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfaup.2015.56372 | ||
| نویسنده | ||
| محمد رضا متینی* | ||
| دکترای معماری، دانشکده معماری و شهرسازی، دانشگاه اشتوتگارت، آلمان | ||
| چکیده | ||
| به طور معمول بخش مهمی از تغییرات در معماری از طریق ساختارهای تغییرپذیر ممکن میگردند. این گونه ساختارها عموماً از مصالحی سخت یا نرم یا ترکیبی از ایندو تشکیل شدهاند، اما توسعۀ مصالح جدید در عرصۀ معماری، امکان بهرهگیری از اجزای انعطافپذیر و خمشو را نیز در سالهای اخیر فراهم نموده است. این گونه ساختارهای تغییرپذیرخمشو، برتریهایی نسبت به ساختارهای تغییرپذیر معمول داشته که از مهمترین آنها سادگی، سبکی، نیاز به اجزای الحاقی کمتر و قابلیت بازگشتپذیری سادهتر به فرم اولیه میباشد. نو بودن اینگونه سازهها باعث گردیده پاسخ به بسیاری از مسایل و سؤالات مربوط به آنها، مطالعه و پژوهشهای جدیدی را طلب کند که یکی از مهمترین این سؤالات به مکانیزمهای مناسب برای تغییرپذیری آنها مربوط میشود. در این مقاله سعی شده تا با رویکردی بایونیکی به یافتن پاسخهایی ملهم از طبیعت برای مکانیزمهای مولد تغییر فرم در این سازهها پرداختهشود. در این مسیر با بهکارگیری فرایندی سلسله مراتبی و علمی، سعی به یافتن الگوهایی مناسب از طبیعت، استخراج ایدهها از این الگوها و ارایۀ مثالهایی عملکردی در معماری با ایدههای بهدست آمده شده است. در این مسیر دو روش برای انتقال قوانین طبیعت به معماری پیشنهاد گردیده که این روشها میتوانند در بسیاری از رویکردهای بایونیکی مشابه نیز استفاده داشته باشند. | ||
| کلیدواژه‌ها | ||
| ساختارهای تغییرپذیر؛ سازه‌های خمشو؛ بایونیک؛ الگوهای هندسی؛ مدل‌های فیزیکی؛ فرایند بالا به پایین | ||
| عنوان مقاله [English] | ||
| Pliable Convertible Structures in Architecture Inspired by Natural Role Models | ||
| نویسندگان [English] | ||
| Mohammad Reza Matini | ||
| چکیده [English] | ||
| Generally an important part of changes in architectural constructions are represented by convertible structures. These kinds of structures are composed typically of hard or soft materials or combination of both, which avoid independent structural deformations and need additional elements such as hinges, rollers or other similar components. Development of new construction materials like Fiber-Reinforced Plastic (FRP) provides new opportunities for application of pliable elements in new convertible structures. Deformation of these pliable elements is an active bending one. It means bending of these structures is influenced by residual stress in their load bearing capacity and behavior. In comparison to the traditional convertible structures, the application of these new materials deforms the structures with less or even no hinge or other additional elements. Other important advantages of these structures are: reversibility, simplicity and lightness. The novelty of these structures has caused some uncertainties and questions that should be solved through new research projects. The most important questions are related to the material properties, appropriate deformation mechanisms and shape variation capabilities of these pliable convertible structures. This paper represents a bionics approach for design of some new deformation mechanisms inspired by natural role models for these structures. Due to limited information about pliable structures, the first part of the paper introduces a background and basic information about these structures. Then the main reasons for development of pliable convertible structures will be represented. At the beginning of the main part of the paper the process sequences in biomimetic research (Bottom-up and Top-down process) are described. The technical problem about deformation mechanism of pliable convertible structures and its boundary conditions are defined at the first step of Top-down process sequence. In the second step seventh of best biological role models from our screening process between plants and animals in macro and micro scale are rendered. Two body deformations of the most promising biological role models are selected in the third step. Jellyfish and snapdragon (Antirrhinum majus) are the selected ones. Each one of these natural examples has particular mechanism principle for body deformation. Jellyfish moves through the water by radially expanding and contracting their umbrella. Muscles are used for the contraction of the body and expansion is by an elastic part of their body (mesoglea) which releases the energy stored from the contraction. But deformation of snapdragon caused by an external pressure. The bottom petal of snapdragon bends down by the pressure on both sides of it. This is caused by curved-line folding of this petal. In the fourth step of Top-down process the biological mechanisms are abstracted by two different methods. Body deformation mechanism of jellyfish is abstracted by geometrical models (abstract formal patterns) and petal deformation mechanism of snapdragon is abstracted by physical models (folded paper models). Abstracted biological principles with minor modification are applied in two architectural examples for pliable convertible structures in the final step. The technical prototyping, optimization, potential for implementation and industrial development are issues that need specialized research and practical examination and can be followed in the future trends. | ||
| کلیدواژه‌ها [English] | ||
| Pliable Convertible Structures, Bending-Active Structures, Biomimetic, Geometrical Models, Physical Models, Top-Down Process | ||
| مراجع | ||
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Crawford, R.F (1971), Strength and Efficiency of Deployable Booms for Space Applications, AIAA Paper, No. 71-396, AAS/AIAA Variable Geometry and Expandable Structures Conference (Anaheim, California).
Fischer, B (2002), Von wegen olle Flunder, in dimensionen, das Berliner Wissenschafts-Magazin, Heft 23, pp 10-12.
Gaβ, S; Druesedau, H; Hennike, J (1985), IL31, Bambus-Bamboo, Institute for Lightweight Structures (IL), University of Stuttgart, Stuttgart.
Gengnagel, C; Herna´ndez, E. L; Bäumer, R (2013), Natural-fibre-reinforced plastics in actively bent structures, Proceedings of the Institution of Civil Engineers, Construction Materials 166 December 2013 Issue CM6, pp 365-377
Gertsma, L. W; Dunn, J. H; Kempke, E. E (1965), Evaluation of one type of foldable tube, NASA Lewis research Center, Cleveland, Ohio, NASA TM-X-1187.
Heeger, T (2004), Quallen - gefährliche Schönheit, Hirzel Verlag, Stuttgart.
Lienhard, J. et al (2012), Flectofin®-A Hinge-less Flapping Mechanism Inspired by Nature, Flectofin brochure, Institute of Building Structures and Structural Design, University of Stuttgart, Stuttgart.
Lienhard, J; Alpermann, H; Gengnagel, C; Knippers, J (2013), Active Bending, A Review on Structures where Bending is used as a Self-Formation Process, International Journal of Space Structures, Vol. 28 No. 3&4, pp 187-196.
Lienhard, J.; Knippers, J. (2013), Considerations on the Scaling of Bending-Active Structures, International Journal of Space Structures, Vol. 28 No. 3&4, pp 137-147.
Matini, M.R (2007), Biegsame Konstruktionen in der Architektur auf der Basis bionischerPrinzipien, Institut für Tragkonstruktionen und Konstruktives Entwerfen (ITKE); Doctoral Dissertations, University of Stuttgar, Stuttgart.
Matini, M. R, Knippers, J (2008), Application of "abstract formal patterns" for translating natural principles into the design of new deployable structures in architecture. In: Design and Nature IV, WIT Press, Southampton, ed. C.A. Brebbia , pp. 147-156
Oliver, P. (Hg.) (2007), Encyclopedia of Vernacular Architecture of the World, Taylor & Francis Ebooks, p. 652.
Otto, F. et al (1972), IL5, Wandelbare Dächer/ Convertible Roofs, Institute for Lightweight Structures (IL), University of Stuttgart, Stuttgart.
Otto, F.; Rasch, B (1995), Finding Form-Towards an Architecture of Minimal, Edition Axel Menges, Stuttgart.
Pone, S. (2012), The Toledo Gridshell, EWT, Eco Web Town, on-line Magazine of Sustainable Design, No. 5, Dicembre 2012. Rudofsky, B (1987), Architecture without Architects: A Short Introduction to Non-Pedigreed Architecture, Academy Editions, London.
Ruppert, E. E; Fox, R. S; Barnes, R. D (2004), Invertebrate Zoology - A Functional Evolutionary Approach, Thomson, Brooks/Cole, Kap. 12, p. 116.
Schleicher, S; Lienhard, J; Knippers, J; Poppinga, S; Masselter, T; Speck, T (2011), Bio-inspired kinematics of adaptive shading systems for free form facades, in Proceedings of the IABSE-IASS Symposium, Taller Longer Lighter, London, UK. Sickinger, C; Melcher, J; Ströhlein, T; Nickel, J (2005), Entfaltungsmechanismen für den leichtbau auf basis bionischer elemente, DLR Interner Bericht 03.
Speck, T., Speck, O. (2008), Process sequences in biomimetic research. Design and Nature IV, ed. C.A. Brebbia, WIT Press: Southampton, 3-11
Tan, L. T; Pellegrino, S (2004), Ultra thin deployable reflector antennas. In Proc. 45th AIAA/ASME/ ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 19-22 April 2004, Palm Springs, CAAIAA 2004-1730, p. 2.
URL2: http://www.evologics.de | ||
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