A team of Schlaich Bergermann & Partner and Dietmar Feichtinger Architectes has won the design competition for a new 220m-long footbridge over the Rhône River in Lyon, France.
A three-truss steel girder will cross the river with a span of 160m. It works as a combined arch-cantilever structure, with the deck girder fixed monolithically to the abutments.
The structure's three main elements are an inclined arch, a box girder and an edge girder. The elements are linked with columns and diagonals to produce a stiff three-dimensional truss.
The elements of the truss change their relative positions along the bridge's line and form a wide 'V' at the centre of the crossing under the deck.
The main deck will be made of wood and will have a width of 5m, widening to 6.5m at the bridge's mid-point. A secondary structure provides the substructure for the lightweight deck. Stairways fixed to the outer main girder will provide additional access to the bridge from the river banks.
Steel cast elements have been designed to simplify the various connection points of the spatial structure.
There will be piled foundations with additional prestressed soil anchors.
