THE NEW UEFA BUILDING IN NYON: PRESTRESSED LIGHT SLABS AND OTHER STRUCTURAL ASPECTS

摘要

The extension of the UEFA headquarters in Nyon is a R/C structure, where each floor consists of arnlarge-span annulus-shaped circular slab supported by two rows of columns arranged along asrnmany circular alignments. Flat precast-concrete sun-shading elements protrude from each annularrnslab, along the façades. These slab elements are stiffened by means of ribs, in order to limit theirrnweight and to guarantee a rigid connection with the annular slabs. An innovative solution isrnproposed to limit the thermal bridge between these cantilever elements and the building. Due tornthe large dimension of the spans (11 m in the radial and 9.5 m in the circumferential direction),rnthe annular slabs have been designed and built as hollow-core slabs made of cast-in-situ concreternand HDPE spherical modules. Each slab is prestressed both radially and circumferentially to controlrndeflection. Connection of the sun-shading elements to the slabs are presented and discussed.