Combined shear wall formed by steel pipe concrete frame, double-steel-plate shear wall and inside welded concealed bracing mild steel plates under equivalent steel

The invention discloses a combined shear wall, wherein a steel pipe concrete frame, a double-steel-plate shear wall and inside welded concealed bracing mild steel plates are combined together to form the combined shear wall. Concrete is poured into steel pipes to form the steel pipe concrete frame. The double-steel-plate shear wall and the steel pipe concrete frame are welded and then connected through studs after holes are punched. The inside welded concealed bracing mild steel plates which cross each other in an inclined direction are welded to the inner side of the double-steel-plate shear wall in an attached mode. Reinforcing steel bar meshes are distributed between the inside welded concealed bracing mild steel plates and connected through pull and connecting ribs. Concrete is directly poured on the double-steel-plate shear wall. Compared with an existing shear wall, the combined shear wall has the advantages that the bearing capacity is improved, rigidity attenuation slows down, ductility and energy-dissipating capacity of the shear wall are improved due to concealed bracing, and the anti-seismic property is excellent.