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How are steel beams and concrete decks connected in a composite bridge structure?
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bridge
The multiple-span Seto Great Bridge over the Inland Sea, linking Kojima, Honshu, with Sakaide, Shikoku, Japan.
In a composite bridge structure, steel beams and the concrete deck are connected to function as a single, unified unit. This connection is achieved by welding metal pieces onto the top flanges of the steel beams before the concrete is poured.12
Once these beams are set in place and temporary forms are installed, the concrete is cast directly over the beams, surrounding the welded metal pieces. These pieces act as mechanical connectors between the steel beam and the concrete slab, ensuring they work together to support loads and creating the composite structure.12