The Advantages of Steel-Concrete Composite Girder in Half-Through Concrete-Filled Steel Tube Bowstring Arch Bridge

Abstract

Based on Wang’Anshi bridge under construction (CFST arch bridge, the suspender cross-girder made of Steel-Concrete composite girder, the main span 168 m) as the research object, by monitoring the process of construction, this paper discusses the advantages brought by Steel-Concrete composite girder in concrete-filled steel tube bowstring arch bridge, from such aspects as the construction cost, construction difficulty, in-process structural stress control, maintenance in later period. The results show that steel-concrete composite girders are highly industrialized and effectively reduce site construction difficulties; avoid the cracking problem of concrete cross girder and the maintenance cost is effectively reduced. In conclusion, the steel-concrete composite suspender girders are remarkably better than the prestressed concrete suspender girder.