FRP box-shaped section-concrete composite beam and construction method thereof

The invention belongs to the technical field of building structures, and relates to an FRP box section-concrete composite beam and a construction method thereof.The FRP box section-concrete composite beam comprises a box beam, a straight web arranged in an inner cavity of the box beam and side wing plates arranged on the two sides of the top end of the box beam and defined to form a U-shaped groove, and caulking grooves are formed in the opposite sides of the two side wing plates; the connecting assembly is arranged in the caulking groove, the connecting assembly comprises a plurality of connecting rods which are sequentially arranged in the axis direction of the box beam, the connecting rods penetrate through the side wing plates and are used for being connected with concrete, supporting pieces are arranged on the connecting rods, the supporting ends of the supporting pieces abut against the opposite sides of the inner wall faces of the caulking groove, and the connecting rods are fixed relative to the side