THE NEW JTI HEADQUARTERS IN GENEVA - AN ICONIC SHAPE IN THE SWISS LANDSCAPE

摘要

The new JTI Headquarters constitute a novel architectural landmark in Geneva. The nine-storeyrnbuilding stands on a triangular shaped parcel; it is characterized by three main tubes creating anrnopen environment on the ground floor which boasts a public pedestrian passage. The facaderntrusses create an impressive 60-meter-span cantilever on the north-east side. On the south-westrnside, the building also lifts off the ground in a bridge-like fashion spanning over 80 meters. Thernmain frame is composed of three-dimensional steel trusses supporting light-weight compositernslabs without intermediate supports. Specific procedures, namely, controlled unpropping, jackingrnand temporary tie-down of the structure, allowed for safe cladding installation and control ofrnbuilding deformations. Advanced natural fire analysis led to a consistent reduction of fireproofingrnmeasures of the steel floor framing.