Shaking table tests on semi-active base-isolation system by magnetorheological fluid damper

Takeshi Hiwatashi; Yoichi Shiozaki; Hideo Fujitani; Chikahiro Minowa; Satsuya Soda

doi:10.1117/12.483452

5 August 2003 Shaking table tests on semi-active base-isolation system by magnetorheological fluid damper

Takeshi Hiwatashi, Yoichi Shiozaki, Hideo Fujitani, Chikahiro Minowa, Satsuya Soda

Proceedings Volume 5056, Smart Structures and Materials 2003: Smart Structures and Integrated Systems; (2003) https://doi.org/10.1117/12.483452
Event: Smart Structures and Materials, 2003, San Diego, California, United States

Abstract

Recent study is to the performance of variable dampers for reducing earthquake response of buildings or wind induced sway. The variable damper using magnetorheological fluid (MR damper) changes its damping force by changing the magnetic field acting on the MR fluid according to an electric current. MR dampers have a simple mechanism and don’t need a large amount of energy. Semi-active control using such a variable damper stabilizes building responses in an earthquake better than the conventional passive control. Basic characteristics of the MR damper have been clarified. This time, authors proposed control algorithm of base-isolated structure, which carried out semi-active control by optimal regulator theory. This control algorithm reduces response displacement and response acceleration for the purpose of, and aims at enhancements, such as safety and amenity. This paper presents a comprehensive study on the performance of the MR damper to base-isolated structure. It's describes shaking table tests on a three-story large-scale test frame with base-isolated structure. The test results verify the controlling system and the control effect as a semi-active device of the MR damper.

Citation Download Citation

Takeshi Hiwatashi, Yoichi Shiozaki, Hideo Fujitani, Chikahiro Minowa, and Satsuya Soda "Shaking table tests on semi-active base-isolation system by magnetorheological fluid damper", Proc. SPIE 5056, Smart Structures and Materials 2003: Smart Structures and Integrated Systems, (5 August 2003); https://doi.org/10.1117/12.483452

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