A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Tensile Structures
This chapter discusses how tensile structures are the result of the designer's process to find optimally performing minimal surfaces, with their shape being generated by the equilibrium of tension forces and the manner by which these forces flow into the structure. Classical forms are typically based on symmetry, and generated through geometric extrusion, translation, and the rotation of curves in space. The form of tensile structures is produced by a process of form‐finding that ensures equilibrium of the tensile forces, wherein the curvature directly affects the behavior or stiffness of the structure. Pre‐tensioned anticlastic structures present an evolution of suspended structures. They achieve stiffness independently from external gravity loads by means of internal pre‐stress forces, applied in advance of any external loads. Dynamic relaxation is a numerical method that discretises a structure as a series of simple springs, masses and forces, which are not initially in equilibrium. The counter‐intuitive trick to finding the equilibrium problem is to simulate the structure oscillating. Elegant examples of mastering materials with form were developed in the Expo ‘98 Portuguese National Pavilion designed by Alvaro Siza with the engineering expertise of Cecil Balmond. A large plaza in the exhibition was shaded by a pioneer technological pre‐stressed concrete synclastic roof, which uses its weight to prevent movement from uplift.
Tensile Structures
This chapter discusses how tensile structures are the result of the designer's process to find optimally performing minimal surfaces, with their shape being generated by the equilibrium of tension forces and the manner by which these forces flow into the structure. Classical forms are typically based on symmetry, and generated through geometric extrusion, translation, and the rotation of curves in space. The form of tensile structures is produced by a process of form‐finding that ensures equilibrium of the tensile forces, wherein the curvature directly affects the behavior or stiffness of the structure. Pre‐tensioned anticlastic structures present an evolution of suspended structures. They achieve stiffness independently from external gravity loads by means of internal pre‐stress forces, applied in advance of any external loads. Dynamic relaxation is a numerical method that discretises a structure as a series of simple springs, masses and forces, which are not initially in equilibrium. The counter‐intuitive trick to finding the equilibrium problem is to simulate the structure oscillating. Elegant examples of mastering materials with form were developed in the Expo ‘98 Portuguese National Pavilion designed by Alvaro Siza with the engineering expertise of Cecil Balmond. A large plaza in the exhibition was shaded by a pioneer technological pre‐stressed concrete synclastic roof, which uses its weight to prevent movement from uplift.
Tensile Structures
Kara, Hanif (author) / Bosia, Daniel (author) / de la Rosa, Diego Cervera (author) / Margnelli, Alessandro (author) / Kingman, James (author)
Design Engineering Refocused ; 194-213
2016-09-30
20 pages
Article/Chapter (Book)
Electronic Resource
English
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