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Abstract    A seismic device for steel core frames of high-rise buildings has been developed. The system consists of two concentrically brace frames connected with coupling beams and shear links. The shear link has been designed to yield and dissipate the energy while the coupling beam and other elements of the frames remain elastic. The experimental work had been conducted on a model of halfscale sub-assemblage of core steel frame with its links made in Japan and Indonesia. The result of testing using a prescribed cyclic loading (AISC 341-10) showed that there was no indication of buckling nor fracture of the link on the assemblage as its plastic rotation reached 0.08 rad and beyond, and no decreasing strength indicated in the hysteretic curve. At the same time, there was no indication of any damage (yielding, buckling) in coupling beam (web, flange, end-plate, bolts) and column. Yielding is localized only in web and flange of the link. The Indonesian shear link specimen showed higher values of shear resisting force due to the higher value of its material yield-strength as compared to the Japan link specimen. However, both specimens showed the same ductility when they reached the maximum strength with its plastic rotation beyond 0.08 rad. as specified in the code (AISC 341-10).