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http://dx.doi.org/10.7734/COSEIK.2012.25.4.323

Experimental Verification of a Liquid Damper with Changeable Natural Frequency for Building Response Control  

Kim, Dong-Ik (단국대학교 건축공학과)
Min, Kyung-Won (단국대학교 건축공학과)
Park, Ji-Hun (인천대학교 도시건축학부)
Kim, Jae-Keon (현대건설(주) 연구개발실)
Hwang, Kyu-Seok (현대건설(주) 연구개발실)
Gil, Yong-Sik (현대건설(주) 연구개발실)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.25, no.4, 2012 , pp. 323-330 More about this Journal
Abstract
This study deals with the experiments of liquid dampers with multi cells whose vertical tubes are divided into several square columns for easily changing natural frequencies. Shaking table test is performed to verify control effectiveness of the dampers which are installed on a building structure. To design liquid dampers, a 64-story building structure is reduced to a SDOF structure with 1/20 of similitude laws based on acceleration. The structure model is made up to adjust its mass and stiffness easily, with separate mass and drive parts. Mass parts indicate real structure's weights and drive parts indicate real structure's stiffness with springs and LM guides. Manufactured liquid damper has 18 cells and its natural frequency ranges are 0.65Hz to 0.81Hz. Shaking table test is carried out with one way excitation to compare with only accelerations of a large-scale structure and a structure installed with liquid dampers. Control performance of the liquid damper is expressed by the transfer function from shaking table accelerations to the large-scale structure ones. Testing results show that the liquid damper reduced a large-scale structure's response by tuned natural frequencies.
Keywords
liquid damper with multi cell; acceleration responses; natural frequency; shaking table test; transfer function; tuning;
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Times Cited By KSCI : 1  (Citation Analysis)
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