OPEN ACCESS
Contemporary design approaches of adaptive structures enhanced to a great extent through digital technology, gradually acknowledge the fact that the area encompasses a number of disciplines, bringing together a number of distinct modes of investigation. Within this frame, the interactive development of a cable bending-active footbridge structure presented in the current paper aims at clarifying the process of integral design applied. The structural prototype consists of two parallel series of bending-active PETG members with initial inverted curvatures forming continuous elastic curvilinear elements, which are horizontally interconnected through cables. In a preliminary design stage, the structure is conceptualized through cyclically iterated physical modelling and preliminary finite element analysis. The design development stage is based on digital simulation, whereas the load-bearing and adaptive behaviour of the structure is examined and visualized in real time according to the pretension of the cables and predefined pedestrian movement scenarios, respectively. Following the construction design and manufacturing of the structural members, the design evaluation stage addresses beyond verification issues of the design proposed, structural optimization aspects through investigation of suitable pretension values of the cables and geometric characteristics of the bending-active members. The integral design approach of the adaptive structure is exemplary for integrating different modes of operation and digital investigation tools in achieving effective load-bearing characteristics and adaptability of the structure.
adaptive structures, bending-active members, hybrid systems, integral design, interdisciplinary design
[1] Kontovourkis, O., Computer-generated circulation diagrams, PhD Thesis, University of Bath, Bath, 2009.
[2] Kontovourkis, O., Phocas, M.C. & Tryfonos, G., Prototyping of an adaptive structure based on physical conditions. Architectural Computing, 11(2), pp. 203–223, 2013. http://dx.doi.org/10.1260/1478-0771.11.2.205
[3] Khoo, C.K., Salim, F. & Burry, J., Designing architectural morphing skins with elastic modular systems. Architectural Computing, 4(9), pp. 397–419, 2011. http://dx.doi.org/10.1260/1478-0771.9.4.397
[4] Phocas, M.C., Kontovourkis, O. & Nicolaou, N., Design concept of a kinetic formactive hybrid envelope structure. Design & Nature and Ecodynamics, 9(1), pp. 13–30, 2014. http://dx.doi.org/10.2495/DNE-V9-N1-13-30
[5] Lienhard, J., Bending-active structures. Form finding strategies using elastic deformation in static and kinetic systems and the structural potentials. PhD Thesis, Research Report 36, ed. J. Knippers, Institute of Building Structures and Structural Design, University of Stuttgart, Stuttgart, 2014.
[6] Fleischmann, M., Knippers, J., Lienhard, J., Menges, A. & Schleicher, S., Material behaviour. Architectural Design, 216, pp. 44–51, 2012. http://dx.doi.org/10.1002/ad.1378
[7] Schinneger, K., Rutzinger, S., Knippers, J. & Scheible, F., Biomimetic media façade. Thematic pavilion Expo 2012 Yeosu, South Korea. International Adaptive Architecture Conference, Building Centre, London, 2011.
[8] Schlaich, J., Bergermann, R., Boegle, R., Cachola, A. & Flagge, S.P., Light Structures. Prestel: New York, 2005.
[9] Otto, F., Spannweiten. Verlag Ullstein: West Berlin, 1965.
[10] Ferre, A., Patent Constructions. New Architecture made in Catalonia. Actar: Barcelona, 2007.
[11] Menges, A., Material computation. Architectural Design, 216, pp. 14–21, 2012. http://dx.doi.org/10.1002/ad.1374
[12] Kontovourkis, O., Physical data computing in adaptive design process. Proceedings of International Conference on Adaptation and Movement in Architecture, ICAMA 2013, eds C. Ripley & M. Asefi, Ryerson University: Toronto, pp. 224–236, 2013.
[13] Phocas, M.C., Kontovourkis, O. & Alexandrou, K., The structural design and construction of a cable bending-active structure. Mobile and Rapidly Assembled Structures IV, eds N. Temmerman & C.A. Brebbia, Section 1: temporary structures and dwellings, WIT Transactions on the Built Environment, 136, pp. 59–70, 2014. http://dx.doi.org/10.2495/mar140051
[14] Ahlquist, S. & Menges, A., Realizing formal and functional complexity for structurally dynamic systems in rapid computational means: computational methodology based on particle systems for complex tension-active form generation. Advances in Architectural Geometry 2010, eds C. Ceccato, L. Hesselgren, M. Pauly, H. Pottmann & J. Wallner, Springer: Vienna, pp. 205–220, 2011.
[15] Phocas, M.C., Kontovourkis, O. & Ioannou, T., Interdisciplinary research based design: the case of a kinetic form-active tensile membrane. Architectural Engineering Technology, 1(2), pp. 1–7, 2012. http://dx.doi.org/10.4172/2168-9717.1000104
[16] Fleischmann, M. & Menges, A., Physics-based modeling as an alternative approach to geometrical constrain-modeling for the design of elastically-deformable material systems. Digital Physicality|Physical Digitality, 30th eCAADe Conference Proceedings, Czech Technical University in Prague, Prague, Vol. 1, pp. 565–575, 2012.
[17] Phocas, M.C., Kontovourkis, O. & Alexandrou, K., Design of a controlled cable bending-active structure. Proceedings of International Conference on Adaptation and Movement in Architecture, ICAMA 2013, eds C. Ripley & M. Asefi, Ryerson University, Toronto, pp. 237–249, 2013.