Leading consulting group with a 360° approach
The bridge is a 3,120 metres long combined road and railway bridge comprising a central single-track railway and a two-lane roadway on either side giving a total width of the bridge deck of 24.7 metres.
There are two 300 metres long cable-stayed navigation spans separated by a central cable-stayed bridge section containing aninclined anchor pier.
The vertical navigation clearance is 41 metres above the maximum water level of the river. The approach spans on both sides of the cable-stayed part of the bridge have a constant span length of 60 metres.
The superstructure for the entire bridge is a composite structure with a central closed steel box 5.7 metres wide and 5.5 metres high. On each side of this closed steel box the roadways are supported every 3 metres by inclined steel struts welded to the central closed box. On top of the steel structure there is a concrete slab 250 mm thick forming the road surface and the support for the railway ballast.
The purpose of the independent design review was to check the structural adequacy of the cable-stayed bridge structure. The review comprised an evaluation of the design basis and a check of the structural system and all main structural members with respect to function and safety of the detailed design.
The dynamic response of the bridge was checked with DVMFLOW and the risk of stay-cable vibrations was evaluated. Critical construction stages were analysed comprising the free standing pylon and the cantilevered bridge before closure at mid-span.
Independent design review of the cable-stayed main bridge
Construtora Norberto Odebrecht S.A.