The present disclosure provides a lightweight steel-coarse aggregate reactive
powder concrete composite beam structure which comprises a plurality of segments, each segment comprising: a
steel box girder comprising a bottom plate, a plurality of
steel box girder webs and a plurality of
steel box girder diaphragms. A coarse aggregate reactive
powder concrete
bridge deck comprises a plurality of precast bridge decks, a longitudinal wet joint and a transverse wet joint. A plurality of T-shaped pre-embedded
steel plates are arranged on the bottom surface of the pre-fabricated
bridge deck, the webplate thereof is connected with the steel
box girder cross diaphragm plate, the top surface of the T-shaped pre-embedded steel plate is welded with a shear connector, and the shear connector is pre-embedded in the pre-fabricated
bridge deck, so that the T-shaped pre-embedded steel plate and the pre-fabricated bridge
deck form an integral whole. The invention can improve the mechanical performanceof the steel-concrete composite beam, enlarge the applicable span and scope, improve the construction speed and
process quality of the
bridge engineering, and overcome the problems of self-weight of the traditional steel-concrete composite beam and easy
cracking of the bridge
deck without reducing the mechanical performance of the concrete bridge
deck.