Cao, TingD'Acunto, PierluigiCastellón, Juan JoséTellini, TelliniAlessandroSchwartz, JosephZhang, Hong2021-02-242021-02-242021Cao, Ting, D'Acunto, Pierluigi, Castellón, Juan José, et al.. "Design of prestressed gridshells as smooth poly-hypar surface structures." <i>Structures,</i> 30, (2021) Elsevier: 973-984. https://doi.org/10.1016/j.istruc.2021.01.047.https://hdl.handle.net/1911/110074This article demonstrates the design potentials of a recently developed approach for generating smooth poly-hypar surfaces, freeform surfaces made of combinations of hyperbolic paraboloids (hypars). In a smooth poly-hypar surface, the double curvature of the individual hypar modules and the smooth connections between them ensure global bending-free structural behaviour. In this article, the structural analysis of a prestressed gridshell as a smooth poly-hypar surface is introduced. Graphic statics is used to evaluate and control the distribution of internal forces within the structure. Moreover, a case study, the Hypar Pavilion, is presented as a prestressed gridshell as a smooth poly-hypar surface structure. The Hypar Pavilion was prefabricated using lightweight materials and low-tech manufacturing techniques. The entire gridshell was manually built out of forty individual hypars, which were combined following a specific sequence to ensure the kinematic stability of the ongoing construction without scaffolding.engThis is an open access article under the CC BY-NC-NDJournal article1-s2-0-S2352012421000515-mainhttps://doi.org/10.1016/j.istruc.2021.01.047