Rigidity-heterosexual type combined shear connector

The invention discloses a combined shear connector, which comprises welding studs, wherein at least one gap is formed at the root of each welding stud in a stud rod direction; and an elastic piece is filled in each gap. The invention further provides a combined structure formed by the combined shear connector, a steel member and a concrete member, wherein the combined shear connector is in welded connection with the steel member; the concrete member is poured on the steel member; and the gap width direction of the gap is consistent with a smaller shear rigidity direction of a combined surface of the steel member and the concrete member, and orthogonal with a larger shear rigidity direction of the combined surface of the steel member and the concrete member. The combined structure has the advantages that while reliable shear rigidity of the combined surface of the steel member and the concrete member is guaranteed, shear rigidity of the combined surface is reduced; concrete tensile stress caused by concrete sh