An unreinforced steel-UHPC composite bridge deck structure and a construction method thereof

An unreinforced steel-UHPC composite deck structure comprises a UHPC bridge deck, an orthotropic steel bridge deck and a connecting bolt, and that main part of the UHPC bridge deck is not provided with stress reinforcement and structural reinforcement. When the UHPC bridge deck is cast in-situ in sections, the joint part adopts a keytooth bite joint or a flat joint with close reinforcement, and the keytooth bite joint is matched with a metal corrugated sleeve and a joint thread steel bar. The invention also discloses a construction method of the composite bridge deck structure. This steel-UHPCcomposite bridge deck structure is simple, which significantly reduces the raw material cost of composite bridge deck structure, reduces the construction human cost, and shortens the construction period, and the overall bearing capacity and fatigue resistance of bridge deck meet the stress requirements. the unreinforced steel-UHPC composite bridge deck structure is suitable for fatigue strengthening of orthotropic steel