Abstract
AbstractIn the last decades, grid shell structures are widely spreading in many architectural works because they combine the beauty of their shape with the efficiency of the structural performance. They represent a fascinating example where the architectural design merges with the structural one since the “form” is itself the “structure”. Thanks to this, grid shells are able to cover large spans with light solutions relying on the inherent rigidity provided by the double curvature shell. In many cases grid shells are also equipped with pretensioned members aimed at enhancing some structural properties such as stability, lateral stiffening, etc. The design of grid shells is often based on optimization strategies, which guarantee structurally efficient solutions by considering the role of each structural element composing the grid shell. In this context, the paper aims at investigating the influence of pretensioned members on the solution obtained from the structural optimization process. In particular, considering the case study of the Smithsonian Museum canopy in Washington equipped with pretensioned rods, the role of these elements is explored within the optimization design procedure.KeywordsGrid shellStructural optimizationPretension
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