Optimal Use of Viscoelastic Dampers in Building Frames for Seismic Force
Publication: Journal of Structural Engineering
Volume 125, Issue 4
Abstract
Control of the seismic response of multistory building frames using optimally placed viscoelastic dampers (VEDs) is investigated. Responses are obtained in frequency domain using spectral analysis for narrow and broad band stationary random ground motions. Optimal locations of passive VEDs are found with the help of a controllability index, which is obtained with the help of the root-mean-square value of the interstory drift. To highlight the effect of modeling and optimal location of VEDs on the response reduction, three different mathematical models of the VEDs and three alternative schemes of placement of VEDs are considered. The response of the 20-story shear-frame model is controlled by the proposed strategy. It is shown that the scheme of the optimal placement of VEDs provides more reduction in response compared with other schemes of placement of VEDs considered in the study. Furthermore, the optimal placement of dampers is sensitive to the nature of excitation force, total quantity of viscoelastic material used, and the modeling of VEDs.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 125 • Issue 4 • April 1999
Pages: 401 - 409
History
Received: Dec 19, 1997
Published online: Apr 1, 1999
Published in print: Apr 1999
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