B+S
Location |
Client |
Service |
Category |
Completion |
Description
As part of the new construction of Berlin Brandenburg Airport, the terminal building was planned as a representative entrance structure. The supporting structure was designed as a seamless spatial frame construction with a roof level designed as a girder grid.
The structure is partially founded on the underground train station structure of the airport’s rail connection, partially on the two pedestrian tunnels of the concourses and on the smoke extraction duct of the train station structure, as well as in the remaining areas directly next to the existing buildings on a bored pile foundation. Due to the structures existing under the terminal building, a foundation of the structure was only possible in selected axes of the regular column grid. In the remaining axes, suspended columns were arranged for architectural reasons.
The roof covering was designed as a lightweight roof construction using trapezoidal sheet metal as a supporting element and a green roof. Four staircases (escape stairs) were integrated into the terminal building, which are suspended in the columns via crossbeams.
Special features
- The highly differing foundation situations, combined with the considerable restrictions for load transfer into the already existing train station structure, resulted in diverse boundary conditions for the design of the static system.
- In the area above the train station, loads could only be transferred into the existing structure at a few points, which resulted in the formation of a large number of suspended columns and a prestressed girder grid. The staircases also had to be partially suspended from the supporting structure via suspended columns.
- The supporting columns founded on the train station building were designed with elastomer bearings at the column base due to the small cross-sectional dimensions in relation to the train station columns. The existing connection reinforcement planned for a fictitious structure could not be used.
- Bracing of the supporting structure in the north-south direction via frame action and wall panels of the underpass structures; bracing in the west-east direction via frame action and additional connection to the existing structure with heavy-duty shear dowels at half the height of the columns.
- Shear force restraint of the suspended columns on the train station ceiling by means of steel built-in parts anchored on the ceiling with dowels in the engagement of the steel base plates of the height-adjustable columns.
