Design of a Combined Tied Arch and Wide-Flange Continuous Girder Bridge
Arranged in three spans of 40,120,and 40 m,the Xiangrui Bridge in Xining City features the combined tied arch and wide-flange continuous girders.The deck system consists of three-cell open steel box girders and precast reinforced concrete panels.The arch,spatially resembling a spindle,composed of two arch ribs and the in-between wind bracings.The high-strength steel strands in each hanger are integrally compacted,and the hangers are coated for corrosion and radiation aging protection.The ties,consisting of 37,φs15.2 mm steel strands each,are arranged in the central cell of the three-cell steel box girders.The piers are vase-shaped,reinforced concrete solid wall piers,resting on pile caps supported by 6,φ2.0 m bored piles.With superior lateral stiffness and torsional resistance,the wide-flange steel box girders are good options in terms of load bearing capacity and economy.The deck system was constructed by an incremental launching method,prior to the installation of the arch ribs using hydraulic lifting system,and the precast concrete panels were installed by the deck cranes that stood on the cross beams of the wide flanges.
combined girder and arch bridgewide-flange steel box girdercomposite arch ringhigh-strength suspenderinstalling girder ahead of archincremental launchingbridge design
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