Hyperboloid Structures

Hyperboloid structures are architectural structures designed using a hyperboloid in one sheet. Often these are tall structures, such as towers, where the hyperboloid geometry's structural strength is used to support an object high above the ground. Hyperboloid geometry is often used for decorative effect as well as structural economy. The first hyperboloid structures were built by Russian engineer Vladimir Shukhov (1853–1939), including the Shukhov Tower in Polibino, Dankovsky District, Lipetsk Oblast, Russia.

Properties

Hyperbolic structures have a negative Gaussian curvature, meaning they curve inward rather than curving outward or being straight. As doubly ruled surfaces, they can be made with a lattice of straight beams, hence are easier to build than curved surfaces that do not have a ruling and must instead be built with curved beams.

Hyperboloid structures are superior in stability against outside forces compared with "straight" buildings, but have shapes often creating large amounts of unusable volume (low space efficiency). Hence they are more commonly used in purpose-driven structures, such as water towers (to support a large mass), cooling towers, and aesthetic features.

A hyperbolic structure is beneficial for cooling towers. At the bottom, the widening of the tower provides a large area for installation of fill to promote thin film evaporative cooling of the circulated water. As the water first evaporates and rises, the narrowing effect helps accelerate the laminar flow, and then as it widens out, contact between the heated air and atmospheric air supports turbulent mixing.

Work of Shukhov

In the 1880s, Shukhov began to work on the problem of the design of roof systems to use a minimum of materials, time and labor. His calculations were most likely derived from mathematician Pafnuty Chebyshev's work on the theory of best approximations of functions. Shukhov's mathematical explorations of efficient roof structures led to his invention of a new system that was innovative both structurally and spatially. By applying his analytical skills to the doubly curved surfaces Nikolai Lobachevsky named "hyperbolic", Shukhov derived a family of equations that led to new structural and constructional systems, known as hyperboloids of revolution and hyperbolic paraboloids.

The steel gridshells of the exhibition pavilions of the 1896 All-Russian Industrial and Handicrafts Exposition in Nizhny Novgorod were the first publicly prominent examples of Shukhov's new system. Two pavilions of this type were built for the Nizhni Novgorod exposition, one oval in plan and one circular. The roofs of these pavilions were doubly curved gridshells formed entirely of a lattice of straight angle-iron and flat iron bars. Shukhov himself called them ''azhurnaia bashnia'' ("lace tower", i.e., lattice tower). The patent of this system, for which Shukhov applied in 1895, was awarded in 1899.

Shukhov also turned his attention to the development of an efficient and easily constructed structural system (gridshell) for a tower carrying a large load at the top – the problem of the water tower. His solution was inspired by observing the action of a woven basket supporting a heavy weight. Again, it took the form of a doubly curved surface constructed of a light network of straight iron bars and angle iron. Over the next 20 years, he designed and built nearly 200 of these towers, no two exactly alike, most with heights in the range of 12m to 68m.

At least as early as 1911, Shukhov began experimenting with the concept of forming a tower out of stacked sections of hyperboloids. Stacking the sections permitted the form of the tower to taper more at the top, with a less pronounced "waist" between the shape-defining rings at bottom and top. Increasing the number of sections would increase the tapering of the overall form, to the point that it began to resemble a cone.

By 1918 Shukhov had developed this concept into the design of a nine-section stacked hyperboloid radio transmission tower in Moscow. Shukhov designed a 350m tower, which would have surpassed the Eiffel Tower in height by 50m, while using less than a quarter of the amount of material. His design, as well as the full set of supporting calculations analyzing the hyperbolic geometry and sizing the network of members, was completed by February 1919. However, the 2200 tons of steel required to build the tower to 350m were not available. In July 1919, Lenin decreed that the tower should be built to a height of 150m, and the necessary steel was to be made available from the army's supplies. Construction of the smaller tower with six stacked hyperboloids began within a few months, and Shukhov Tower was completed by March 1922.

Other architects

Antoni Gaudi and Shukhov carried out experiments with hyperboloid structures nearly simultaneously, but independently, in 1880–1895. Antoni Gaudi used structures in the form of hyperbolic paraboloid (hypar) and hyperboloid of revolution in the Sagrada Família in 1910. In the Sagrada Família, there are a few places on the nativity facade – a design not equated with Gaudi's ruled-surface design, where the hyperboloid crops up. All around the scene with the pelican, there are numerous examples (including the basket held by one of the figures). There is a hyperboloid adding structural stability to the cypress tree (by connecting it to the bridge). The "bishop's mitre" spires are capped with hyperboloids.

In the Palau Güell, there is one set of interior columns along the main facade with hyperbolic capitals. The crown of the famous parabolic vault is a hyperboloid. The vault of one of the stables at the Church of Colònia Güell is a hyperboloid. There is a unique column in the Park Güell that is a hyperboloid. The famous Spanish engineer and architect Eduardo Torroja designed a thin-shell water tower in Fedala and the roof of Hipódromo de la Zarzuela in the form of hyperboloid of revolution. Le Corbusier and Félix Candela used hyperboloid structures (hypar).

A hyperboloid cooling tower was patented by Frederik van Iterson and Gerard Kuypers in 1918.

The Georgia Dome was the first Hypar-Tensegrity dome to be built.

Gallery of shape variations

File:Hyperbolic-paraboloid.jpg, The hyperbolic paraboloid is a doubly ruled surface so it may be used to construct a saddle roof from straight beams.
File:W-wa Ochota PKP-WKD.jpg, The Warszawa Ochota railway station has a hyperbolic paraboloid saddle roof. Warsaw, Poland, 1962.
File:Pengrowth Saddledome.jpg, The Scotiabank Saddledome arena has a hyperbolic paraboloid saddle roof, Calgary, Canada, 1983.
File:Stapelchips.jpg, Stackable Pringles chips are hyperbolic paraboloids.
File:3D dual use.jpg, 3D-printed dual-use pen/toothbrush holder-cup. Printed on Ultimaker 2, 2015.
File:Bridge over Corporation Street - geograph.org.uk - 809089.jpg, The Corporation Street Bridge is a horizontal doubly ruled hyperboloid structure, Manchester, England, 1999.


File:Ruled hyperboloid.jpg, A hyperboloid of one sheet is a doubly ruled surface, and it may be generated by either of two families of straight lines.
File:Rozhledna Slunečná.JPG, :cs:Slunečná (rozhledna), (Sunny (lookout tower)) is a simpler hyperboloid structure, Velké Pavlovice, Czech Republic, 2009.
File:Turm Panorama.jpg, The ''Mae West'' (sculpture) is a doubly ruled surface hyperboloid structure, Munich, Germany, 2011.
File:Shukhov Hyperboloid Tower Project of 350 metres of 1919 year.jpg, Vladimir Shukhov's 1919 tower project stacks 9 hyperboloids to reach 350 metres.
File:Mcdonnell planetarium slsc.jpg, Saint Louis Science Center's James S. McDonnell Planetarium, St. Louis, Missouri, United States, 1963.
File:Newcastle International Airport Control Tower.jpg, Newcastle International Airport air traffic control tower, Newcastle upon Tyne, United Kingdom, 1967.
File:Ciechanow water tower.jpg, The Ciechanów water tower is a toroidal water tower tank on a doubly ruled hyperboloid structure, Ciechanów, Poland, 1972.
File:Thtr300 kuehlturm.jpg, The THTR-300 cooling tower for a now-decommissioned nuclear reactor in Hamm-Uentrop, Germany, 1983.
File:Arndale Bridge interior.jpg, The Corporation Street Bridge interior view.
File:Killesberg Tower.jpg, The Killesberg Tower uses doubly ruled hyperboloid tensegrity cables to solidify its structure, Stuttgart, Germany, 2001.
File:Canton Tower (6343573033).jpg, The Canton Tower, in the Haizhu District of the city of Guangzhou (historically known as Canton), in Guangdong, China, 2010.
File:Hemer-Juebergturm1-Asio.JPG, :de:Jübergturm is the first wooden hyperboloid tower structurally supported only by the outer wood framework, Hemer, Märkischer Kreis, Arnsberg, North Rhine-Westphalia, Germany, 2010.
File:Tachov - rozhledna Vysoká (1).JPG, The Vysoká (High Lookout) Tower uses doubly ruled hyperboloid tensegrity cables to solidify its structure, Tachov, Pilsen Region, Czech Republic, 2014.
File:Les Essarts-le-Roi Château d'eau.JPG, Les Essarts-le-Roi château d'eau (water tower), Les Essarts-le-Roi, Yvelines.
File:Heerlerheide Gen Coel (1).jpg, Gen Coel Building houses a public library, shopping, and community centre in Heerlerheide, Heerlen, Netherlands.
File:Our Zuo table.jpg, A Zuo table.

See also

* Cooling tower
* Geodesic dome
* Lattice mast
* List of hyperboloid structures with gallery
* List of thin shell structures
* Ruled surface
* Sam Scorer
* Tensile structure
* Thin-shell structure
* World's first hyperboloid structure

Notes

References

* "The Nijni-Novgorod exhibition: Water tower, room under construction, springing of 91 feet span", "The Engineer", № 19.3.1897, pp. 292–294, London, 1897.
* William Craft Brumfield
"The Origins of Modernism in Russian Architecture"
University of California Press, 1991, .



“Arkhitektura i mnimosti”: The origins of Soviet avant-garde rationalist architecture in the Russian mystical-philosophical and mathematical intellectual tradition”
a dissertation in architecture, 264p., University of Pennsylvania, 2000.
* "Vladimir G. Suchov 1853–1939. Die Kunst der sparsamen Konstruktion.", Rainer Graefe, Jos Tomlow und andere, 192 S., Deutsche Verlags-Anstalt, Stuttgart, 1990, .

External links

The research of the Shukhov's World's First Hyperboloid structure
Prof. Dr. Armin Grün

International campaign to save the Shukhov Tower



Shells: Hyperbolic paraboloids (hypar)

Hyperbolic Paraboloids & Concrete Shells

Special Structures




ttps://web.archive.org/web/20060927053053/http://www.tec21.ch/pdf/tec21_4120041723.pdf
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Structural system
Russian inventions