Seismic Analysis of K-eccentrically Braced Steel Frame

The paper demonstrates that high elastic stiffness and excellent energy dissipation of eccentrically-braced steel frame is a lateral load-resisting system applied to the building in the high intensity area.The nonlinear finite element model is stimulated by the combination of the shell element and beam element to make elastic-plastic time history analysis on the K-eccentrically braced steel frames.The paper also investigates the influence of different parameters such as the length of link beam and height-to-thickness ratio of web,as well as the distance of the links stiffness on the seismic behavior of K-eccentrically braced steel frame under the rare earthquake action.Some suggestions are acquired for the structural seismic design.