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N. Hori¹, M. Ikenaga², K. Ikago³ and N. Inoue²

¹Department of Architecture, Tohoku Institute of Technology, Sendai, Japan
²Department of Architecture and Building Science, Tohoku University, Sendai, Japan
³International Research Institute of Disaster Science, Tohoku University, Sendai, Japan

Keywords: base isolated structure, friction damper, coupling mechanism, control of seismic response displacement, ground motion, long period components, smart passive damper, multistage damping system..

Summary

Base isolated structure systems can reduce seismic response acceleration. But over predicted response displacement may occur as a result of extreme earthquakes and ground motion, including long period components. To mitigate the damage caused by the excessive displacement beyond the usual design limit, the authors proposed and developed a displacement controlling system by the means of a friction damper with a coupling mechanism that is activated only after large displacements occur.

In this paper, the multistage damping system, using different types of the friction damper with a coupling mechanism, is investigated. Friction dampers are coupled corresponding to the input ground motion level, and then, dampers provide suitable damping capacity. Design parameters of friction dampers are determined based on the properties of the suitable hysteretic damper for each input level.

The results of the analytical study show that the proposed system is effective for suppressing the maximum response and keeping a suitable damping capacity for each input ground motion level.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 223 Multistage Friction Damping to Control the Response of a Base Isolated Structure N. Hori¹, M. Ikenaga², K. Ikago³ and N. Inoue² ¹Department of Architecture, Tohoku Institute of Technology, Sendai, Japan ²Department of Architecture and Building Science, Tohoku University, Sendai, Japan ³International Research Institute of Disaster Science, Tohoku University, Sendai, Japan doi:10.4203/ccp.106.223 purchase the full-text of this paper Full Bibliographic Reference for this paper N. Hori, M. Ikenaga, K. Ikago, N. Inoue, "Multistage Friction Damping to Control the Response of a Base Isolated Structure", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 223, 2014. doi:10.4203/ccp.106.223 Keywords: base isolated structure, friction damper, coupling mechanism, control of seismic response displacement, ground motion, long period components, smart passive damper, multistage damping system.. Summary Base isolated structure systems can reduce seismic response acceleration. But over predicted response displacement may occur as a result of extreme earthquakes and ground motion, including long period components. To mitigate the damage caused by the excessive displacement beyond the usual design limit, the authors proposed and developed a displacement controlling system by the means of a friction damper with a coupling mechanism that is activated only after large displacements occur. In this paper, the multistage damping system, using different types of the friction damper with a coupling mechanism, is investigated. Friction dampers are coupled corresponding to the input ground motion level, and then, dampers provide suitable damping capacity. Design parameters of friction dampers are determined based on the properties of the suitable hysteretic damper for each input level. The results of the analytical study show that the proposed system is effective for suppressing the maximum response and keeping a suitable damping capacity for each input ground motion level. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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