INNOVATION IN BRIDgES
new po river Bridge
When the metal deck on the bridge over river po in Italy collapsed, urgent
reconstruction was needed to reconnect lombardy and emilia. The masonry
piers protected by historical and environmental constraints had to be preserved,
so the deck was rebuilt as a spatial reticular steel structure that maximized
durability and sustainability. The replacement bridge is 810.73 meters long with
a main span of 75. 83 meters.
mcA used rm Bridge to analyze various heights for the longitudinal profile and
various angles for the reticular walls. This resulted in a modern interpretation
of the old bridge’s reticular patterns, eliminating classic structural patterns
and reducing the deck girder height by half. Using tubular profiles and new
joint types required in-depth studies to determine fatigue behavior, and the
software’s parametric approach saved considerable time.
mott macDonald Limited
river wear crossing
Sunderland, united kingdom
The $220 million new Wear crossing is part of the Sunderland Strategic
Transport corridor project, creating a new route into central Sunderland in the
United Kingdom. The five-span bridge is 338 meters long, and the 240-meter-
long cable-stayed main span is supported by twin planes of stays arranged
as semi-harps with masts. mott macDonald was commissioned to carry out a
category III design check.
Static and dynamic analyses were performed using a 3D non-linear space-frame created in rm Bridge. The model included the deck, masts, piers, and
foundation. The analysis took into account the behavior of the structure,
materials, and stays. The model was also used to investigate the effects of
fluctuating winds. S TAAD.pro was used to perform the 3D finite element
analysis. The coordinated models allowed for a comprehensive analysis.