Abstract：A shaking table test of a 1/2 scaled model was carried out to study the seismic behavior of high-strength steel composite K-eccentrically braced frames (K-HSS-EBF) and to promote the application of high-strength steel to the construction industry of China. The experimental results of the strain of beam section with energy dissipation, natural frequency, damping ratio, acceleration response and displacement response were presented. The results show that, with the increase of peak ground acceleration, the natural frequency decreases, the damping ratio increases, the acceleration response increases, and the acceleration dynamic magnification factors decreases. The seismic response of prototype structure was deduced from model response according to the dynamic similarity relation. The maximum interstory drift of the structure was 1/1667 in the frequent earthquakes and the maximum interstory drift was 1/237 in the rare earthquakes, which met the demands of the seismic design code of buildings. The K-HSS-EBFs have good seismic performance and can meet the 3-level seismic design demands.
