New bridge lifted into place
A new steel bridge, a 72 m long cycle- and footbridge weighing 155 tons was lifted into place at Nygårdstangen in Bergen on the 3rd of May subsequent to being shipped from Poland where it was assembled.
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Bridge erection at Nygårdstangen, Bergen. Foto: Ingrid Feet Bjørgo, Statens vegvesen
During the erection on site high strength post tensioned steel bars where employed to prevent uplift at the bridge ends and adjust the longitudinal vertical profile of the bridge deck. The bridge cross section is a closed airtight box section with varying section height over the main span. The section height at the supports is 1,5 m and 1,9 m at each end while only 0,89 m in the middle of the 60 m long main span where a 1,5 ton mass damper has been installed to mitigate pedestrian induced vibrations on the slender span. The bridge foundations are made from reinforced concrete supported on 30 m long steel piles.
Erection of the steel superstructure was successful and will be followed up with the last phases of the concrete foundations and assembly of the bridge railing prior to the planned opening to traffic in July 2018.
EFLA's role in the project has included the design of the steel bridge in association with Studio Granda architects, lighting design, drainage and cycle paths for the client, the Norwegian Road Administration.
The massive 155 ton bridge was lifted to its place. Photo: Ivar Gundersen
Photo: Ivar Gundersen.
Different angle of the bridge. Photo: Ivar Gundersen.