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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 102
PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
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Paper 173

A Study of a Base Isolated Structure with Complex Damping for Displacement Control Design

M. Ikenaga1, K. Ikago2 and N. Inoue1

1Graduate School of Engineering, Tohoku University, Sendai, Japan
2International Research Institute of Disaster Science, Tohoku University, Sendai, Japan

Full Bibliographic Reference for this paper
M. Ikenaga, K. Ikago, N. Inoue, "A Study of a Base Isolated Structure with Complex Damping for Displacement Control Design", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 173, 2013. doi:10.4203/ccp.102.173
Keywords: displacement control design, base isolation, rate-independent damper.

Summary
A conventional rate-dependent damper is equipped with a relief valve to restrict an excessively large damping force being generated regardless of the response displacement. The equivalent damping coefficient deteriorates when the ground motion is severe and the relief valve is activated, whereas the damping coefficient is kept large when the input ground motion is moderate and the relief valve is inactive. In this paper an ideal rate-independent damper is proposed that generates a damping force according to the response displacement for the effective displacement control in a base-isolation system. Comparisons with base-isolation systems containing conventional rate-dependent dampers and rate-independent dampers illustrate the effectiveness of the proposed damper for the reduction of floor response acceleration without deterioration of the response displacement.

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