Author(s)

H.H. Choi, J. Kim

Abstract

Evaluation of proper supplemental damping for a multi-story steel frame using capacity spectrum method H.H. Choi, J. Kim Dept. of Architectural Engineering, Sungkyunkwan University, Korea Abstract In this study a straightforward procedure was developed without carrying out time-consuming dynamic nonlinear analysis to obtain the required amount of viscous dampers to meet given performance objectives. To this end nonlinear static response of a structure was obtained first using capacity spectrum method, and the required effective damping ratio was computed from the difference between the analysis result and the target displacement. Then the amount of required viscous damping was obtained using the effective damping ratio. Three different types of seismic story force were considered. The procedure was applied to a 10-story steel frame with added viscous dampers. According to the earthquake time history analysis results, the maximum displacement of the model structure with

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