Recently, many kinds of passive energy dissipation systems have been used for reducing seismic response of building frames in seismic design. Among them, viscoelastic dampers dissipate seismic input energy depending on their deformations and velocities. Therefor, it is important to estimate accurately deformations and velocities of dampers in determining analytical model. A series of dynamic response analyses are carried out using simple or accurate types of modeling for a 100m height steel frames. This paper presents a comparison of differences caused by modeling technique and effects of damper quantity and horizontal locations on seismic performance. A simplified calibration method of analytical model based on effective damper deformations is also proposed.
