Test piece and method for shear capacity testing of steel-concrete interface shear connecting piece

The invention discloses a test piece and a method for shear capacity testing of a steel-concrete interface shear connecting piece. The test piece comprises a steel plate, a concrete block, a stirrup and a shear connecting piece, and is characterized in that the number of the shear connecting piece is one, wherein the concrete block is cuboid and the cross section of the concrete block is square; the stirrup is a cuboid stirrup with a square cross section enclosed by a reinforcing steel bar; the stirrup is cast in the concrete block; the geometric center of the stirrup is overlapped with the geometric center of the concrete block; two opposite sides of the cross section of the stirrup are parallel with two opposite sides of the cross section of the concrete block; the concrete block is cast on the steel plate; the rod end of the shear connecting piece is welded to the steel plate; and the shear connecting piece is perpendicular to the steel plate and is positioned in the center of an interface of the steel pla