Thornton Tomasetti is providing structural engineering and building skin design services for the reconstruction of the existing Dynamo Stadium into a world-class venue to host the 2018 World Cup championship games. The 655,000-square-meter sports center will be composed of a new 33,000-seat football stadium, a 12,000-seat basketball/hockey arena, restaurants, a training facility and parking. Two levels of retail space will be constructed within portions of the historically preserved façade of the old stadium.
Maintaining the aesthetic goals of the new structure and the historic exterior entryway of the old stadium will require several types of structural materials and system configurations. Cast-in-place concrete will be utilized in the parking and retail levels for foundations, floor slabs and columns up to the event floor. Above the event floor, structural steel framing will be used to frame the seating bowls, concourses and super trusses at building overhangs.
The enclosed roof over the arena, the stadium roof with an oculus, and the building façade are contained within one structural system, each with vastly different support conditions and spans. The roof framing will consist of diagrid trusses built of round hollow structural steel members supporting the building skin elements.
The exterior cladding surface will be constructed of ETFE pillows supported between the round hollow shaped members of the diagrid trusses. Connection of the ETFE pillow, internal mullions and anchorage to the round truss members will be developed to provide easy erection and maintenance without sacrificing function or integrity. Current concepts include using eight-meter-long sides and using internal mullions to provide a quilted look to reduce the visual scale of the pillows.