For the dynamic time-history analysis of a passively controlled building, a shear beam model having a small degree of freedom is typically used in Japan. This paper proposes such a modeling method for the building with velocity-dependent dampers. The method is based on static analyses of the frame without the dampers, and it predicts the lateral stiffness and damping coefficient at each story level where dampers are installed. Using this method, a shear beam model is created from an example 10-story building consisting of three parallel frames, each of which has 6 bays and 20 dampers. The damper is assumed to be a viscoelastic damper with a brace or stud type configuration. Time-history analysis results for the shear beam model are found to match very well with those for the member-to-member model that has considerably larger degree of freedom.
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