Synchronous connecting device for double-layer longitudinal load-bearing steel bars of stiff concrete structure

The utility model relates to a synchronous connecting device for double-layer longitudinal load-bearing steel bars of a stiff concrete structure, which comprises a steel reinforced column vertically extending; the Z-shaped bearing steel plate comprises a part A which is welded with the steel rib column and horizontally extends, a part B which obliquely extends towards the direction far away from the steel rib column, and a part C which horizontally extends from the tail end of the part B; the Z-shaped bearing steel plates are arranged in pairs and distributed up and down at intervals, and the B parts extend towards the interior of the beam; the upper row of beam stress main reinforcements are welded with the part A of the upper Z-shaped bearing steel plate, and the middle parts of the upper row of beam stress main reinforcements are lengthened through steel bar sleeves; the upper two rows of beam stress main reinforcements are welded with the C parts of the upper Z-shaped bearing steel plates, and the middle