![]() ![]() Although, it is considered that Fernand Aimond (1902–1984) used hyperbolic paraboloids for constructing thin hypar concrete shells for the first time, it is Felix Candella (1910–1997) who is credited for popularizing this shape as a freeform, as well as in complex reinforced concrete shell structures, especially in the 1950s and 1960s (Faber 1963). The hyperbolic paraboloid is one of the most popular mathematical surfaces that have been prevalently used in designing thin concrete shells. With this motivation, different mathematical surfaces were used as structural forms. The idea was to derive strength in a structure not just from the mass but from the shape itself. Since this period, RCC allowed architects and engineers to have more liberty to experiment with geometries in order to construct aesthetically new and elegant forms that are structurally efficient. At the beginning of the 20th century, thanks to the wide and efficient applications of reinforced cement concrete (RCC) technology, a number of shape-resistant or surface-active freeform shell structures started to appear. ![]()
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