The $24 million bridge carrying the tramway T1 extension over the Rhone River
in Lyon, France, is dedicated to tramways, bicycles, and pedestrians. ARCADIS
partnered with S TRATES architects to enter the 2010 designer competition.
The design team’s vision led to a steel bow-string bridge with two separated
decks—one for tramways and the other for pedestrians and cyclists.
The main span is 188 meters for a total bridge length of 250 meters. The design
team developed an RM Bridge 3D model to analyze the general behavior of
this structure, including static effects, general buckling, large displacements,
vibrations of the pedestrian deck under tramway traffic, and vibrations due to
Aberdeen Channel Bridge SIL(E)
Hong Kong, China
The South Island Line (East) extends the Hong Kong metro system to link South
Horizons to Admiralty Station, transporting 20,000 passengers per hour in
both directions. A new 225-meter bridge will carry two mass transit railway
tracks over the Aberdeen Channel. Design constraints included avoiding an
existing bridge and tying in to an existing viaduct and tunnel. Buildability,
maintainability, and cost control were also concerns.
Atkins used RM Bridge’s geometric preprocessor to rapidly input the bridge
alignment and varying cross sections, which ensured that incorporating later
changes minimized rework. Creep and shrinkage calculations were modified
for local Hong Kong standards to determine the time-dependent effects, and
post-tensioning strand details were easily modified during the iterative design
process. The software’s staged construction analysis generated more than 35