Abstract
A simplified method to assess the seismic performance of structures with added viscous or viscoelastic dampers is proposed. It is based on the momentary energy dissipated in structures with/without additional dampers and evaluates the reduction ratio of maximum acceleration of earthquake ground motions. The changes in structural stiffness, damping factor and seismic momentary induced energy are considered to relate the proposed method to the maximum displacement response of damped structures. Extensive time history analyses on the single-degree-of-freedom system with additional viscous or viscoelastic dampers are performed and results have shown a good agreement with those predicted by the proposed method.
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