Concrete filled tubular arch bridge was widely used in China.The large dead weight and non-integrity of prestressed concrete deck above the arch went against the durability and bridge seismic design.Modified verbundfertigteil (VFT) was proposed as deck in the arch bridge.Modified VFT girder was convenient to fabricate and was light-weighted.Structural analysis was investigated and it proved that modified VFT was an economic solution.Live loaded structural index (LLSI) was proposed to evaluate the steel bridge's efficiency between different structural schemes.
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