Application of MR damper to base-isolated structures

Norio Iwata; Katsuhiko Hata; Hiroshi Sodeyama; Katuaki Sunakoda; Hideo Fujitani; Ken Hiwatashi; Yoichi Shiozaki; Satsuva Soda

doi:10.1117/12.472572

Application of MR damper to base-isolated structures

Norio Iwata^*, Katsuhiko Hata, Hiroshi Sodeyama, Katuaki Sunakoda, Hideo Fujitani, Ken Hiwatashi, Yoichi Shiozaki, Satsuva Soda

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

7 Citations (Scopus)

Abstract

This paper presents a comprehensive study on the application of the MR damper to base-isolated building structures. It first proposes a simple semi-active control algorithm for a base-isolated structure with an MR damper. The algorithm, in which the MR damper's hysteresis shape is controlled, aims to reduce the isolator's displacement without increasing the acceleration responses of the upper structures. The second part of this paper covers the properties of an MR fluid and an MR damper developed for a base-isolated model structure. The damper has a nominal capacity of 40kN, which can be adjusted in accordance with the applied magnetic fields. In the test, the damper is subjected to cyclic sinusoidal displacements with different amplitudes, velocities and magnetic field intensities. The last part describes shaking table tests carried out using the MR damper and the base-isolated model structure. It is confirmed that the proposed semi-active control method is effective in reducing the isolator's displacement without increasing the acceleration responses.

Original language	English
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Editors	S.C. Liu, D.J. Pines
Pages	352-362
Number of pages	11
Volume	4696
DOIs	https://doi.org/10.1117/12.472572
Publication status	Published - 2002
Event	Smart Structures and Materials 2002: Smart Systems for Bridges, Structures, and Highways - San Diego, CA, United States Duration: 2002 Mar 18 → 2002 Mar 20

Other

Other	Smart Structures and Materials 2002: Smart Systems for Bridges, Structures, and Highways
Country/Territory	United States
City	San Diego, CA
Period	02/3/18 → 02/3/20

Keywords

Base Isolation
Magneto-rheological fluid
MR Damper
Semi-Active Control
Viscous Damping

ASJC Scopus subject areas

Electrical and Electronic Engineering
Condensed Matter Physics

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10.1117/12.472572

Cite this

Iwata, N, Hata, K, Sodeyama, H, Sunakoda, K, Fujitani, H, Hiwatashi, K, Shiozaki, Y & Soda, S 2002, Application of MR damper to base-isolated structures. in SC Liu & DJ Pines (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4696, pp. 352-362, Smart Structures and Materials 2002: Smart Systems for Bridges, Structures, and Highways, San Diego, CA, United States, 02/3/18. https://doi.org/10.1117/12.472572

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title = "Application of MR damper to base-isolated structures",

abstract = "This paper presents a comprehensive study on the application of the MR damper to base-isolated building structures. It first proposes a simple semi-active control algorithm for a base-isolated structure with an MR damper. The algorithm, in which the MR damper's hysteresis shape is controlled, aims to reduce the isolator's displacement without increasing the acceleration responses of the upper structures. The second part of this paper covers the properties of an MR fluid and an MR damper developed for a base-isolated model structure. The damper has a nominal capacity of 40kN, which can be adjusted in accordance with the applied magnetic fields. In the test, the damper is subjected to cyclic sinusoidal displacements with different amplitudes, velocities and magnetic field intensities. The last part describes shaking table tests carried out using the MR damper and the base-isolated model structure. It is confirmed that the proposed semi-active control method is effective in reducing the isolator's displacement without increasing the acceleration responses.",

keywords = "Base Isolation, Magneto-rheological fluid, MR Damper, Semi-Active Control, Viscous Damping",

author = "Norio Iwata and Katsuhiko Hata and Hiroshi Sodeyama and Katuaki Sunakoda and Hideo Fujitani and Ken Hiwatashi and Yoichi Shiozaki and Satsuva Soda",

year = "2002",

doi = "10.1117/12.472572",

language = "English",

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pages = "352--362",

editor = "S.C. Liu and D.J. Pines",

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AU - Iwata, Norio

AU - Hata, Katsuhiko

AU - Sodeyama, Hiroshi

AU - Sunakoda, Katuaki

AU - Fujitani, Hideo

AU - Hiwatashi, Ken

AU - Shiozaki, Yoichi

AU - Soda, Satsuva

PY - 2002

Y1 - 2002

N2 - This paper presents a comprehensive study on the application of the MR damper to base-isolated building structures. It first proposes a simple semi-active control algorithm for a base-isolated structure with an MR damper. The algorithm, in which the MR damper's hysteresis shape is controlled, aims to reduce the isolator's displacement without increasing the acceleration responses of the upper structures. The second part of this paper covers the properties of an MR fluid and an MR damper developed for a base-isolated model structure. The damper has a nominal capacity of 40kN, which can be adjusted in accordance with the applied magnetic fields. In the test, the damper is subjected to cyclic sinusoidal displacements with different amplitudes, velocities and magnetic field intensities. The last part describes shaking table tests carried out using the MR damper and the base-isolated model structure. It is confirmed that the proposed semi-active control method is effective in reducing the isolator's displacement without increasing the acceleration responses.

AB - This paper presents a comprehensive study on the application of the MR damper to base-isolated building structures. It first proposes a simple semi-active control algorithm for a base-isolated structure with an MR damper. The algorithm, in which the MR damper's hysteresis shape is controlled, aims to reduce the isolator's displacement without increasing the acceleration responses of the upper structures. The second part of this paper covers the properties of an MR fluid and an MR damper developed for a base-isolated model structure. The damper has a nominal capacity of 40kN, which can be adjusted in accordance with the applied magnetic fields. In the test, the damper is subjected to cyclic sinusoidal displacements with different amplitudes, velocities and magnetic field intensities. The last part describes shaking table tests carried out using the MR damper and the base-isolated model structure. It is confirmed that the proposed semi-active control method is effective in reducing the isolator's displacement without increasing the acceleration responses.

KW - Base Isolation

KW - Magneto-rheological fluid

KW - MR Damper

KW - Semi-Active Control

KW - Viscous Damping

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M3 - Conference contribution

AN - SCOPUS:0036378754

VL - 4696

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EP - 362

BT - Proceedings of SPIE - The International Society for Optical Engineering

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A2 - Pines, D.J.

T2 - Smart Structures and Materials 2002: Smart Systems for Bridges, Structures, and Highways

Y2 - 18 March 2002 through 20 March 2002

ER -

Application of MR damper to base-isolated structures

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