The central brace combined with a ring damper is used as lateral resistant to improve the lateral stiffness and seismic performance of steel frame. In order to reveal the working mechanism of the new system, three nonlinear finite element models: steel frame with central brace, steel frame with eccentric brace, and steel frame infill central brace with steel ring damper, were established. The results indicate that compared with other two structural systems, the steel frame infill central brace with steel ring damper has the best bearing capacity, energy dissipation ability and seismic behaviour.
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