University of Applied Sciences Center Graubünden, Chur

Client Hochbauamt Graubünden, Chur
Architects Giuliani Hönger Architekten, Zürich
Planning 2021-2024
Execution 2024-2028
Construction cost 178 Mio. CHF
Services Structure, façade and excavation:
Design phase
Tender documentation phase
Execution phase
Visualisations Giuliani Hönger Architekten, Zurich
Topics EducationFacadesTimber constructionStructural steelworkConcrete constructionFair faced concrete

The new University of Applied Sciences Center Graubünden complements the campus on the Pulvermühlestrasse in Chur. The new building is designed as a four-storey, U-shaped structure in timber hybrid construction with a central single-storey entrance hall, which also serves as a foyer and exhibition space. On the first floor, two multifunctional rooms and the canteen form a large, column-free hall of 1200 square meters for the school and the public. The first basement floor extends over the entire floor plan of the building, and a second basement floor is added under the east wing, which is used as a parking garage.
The structural concept of the two wings of the building is based on a strict basic grid of 5.80 m in the longitudinal direction of the building and around 10.8 – 7.7 – 10.8 m in the transverse direction, which allows for appropriate flexibility of use. From the ceiling above the first floor upwards, the supporting structure is constructed as a sustainable and relatively light skeleton structure made of timber and concrete in composite.The main beams are spanned transversely to the building, while the ceiling spans transfer the loads uniaxially in the longitudinal direction.To allow for the extensive column-free rooms on the first floor of the west wing, truss support systems are arranged along the two internal longitudinal axes, each spanning 6 grids and extending over three storeys in order to make maximum use of the available structural height. The single-storey entrance hall is designed without columns to allow for flexible use. For this purpose, two-hinged frames in concrete construction (prestressed) are arranged at intervals of 5.8 m, on which timber-concrete composite ceiling panels are supported. The basement floors are designed as concrete structures, whereby the load-bearing grid of the first floor is retained. Where this is possible for functional reasons, an additional column axis is introduced to reduce the ceiling spans so that slimmer ceilings can be used.
Earthquake and wind-induced horizontal forces are essentially absorbed by the concrete core walls running through all floors.

Once the new building is occupied, the existing building at Pulvermühlestrasse 57 will be renovated and adapted to the planned change of use.