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This version was published on November 1, 2007
Journal of Intelligent Material Systems and Structures, Vol. 18, No. 11, 1111-1120 (2007)
DOI: 10.1177/1045389X06072371

Bracing Systems for Installation of MR Dampers in a Building Structure

Sang-Hyun Lee

Department of Architectural Engineering Dankook University, Seoul, Korea, lshyun00{at}dankook.ac.kr

Kyung-Won Min

Department of Architectural Engineering Dankook University, Seoul, Korea

Lan Chung

Department of Architectural Engineering Dankook University, Seoul, Korea

Sung-Kyung Lee

Seismic Retrofitting & Remodeling Research Center, Dankook University, Seoul, Korea

Myoung-Kyu Lee

Unison E&C, Seoul, Korea

Jae-Seung Hwang

Department of Architectural Engineering, Chonnam National University, Kwang-Ju, Korea

Seung-Bok Choi

Smart Structures and Systems Laboratory, Department of Mechanical Engineering Inha University, Incheon, Korea

Ho-Guen Lee

Department of Automotive Engineering, Daeduk College, Daejeon, Korea

In this study, the effects of bracing systems for installing a magnetorheological (MR) damper in a building structure on seismic response control are analytically and experimentally investigated. The performance of the toggle brace system which enables the installed damper to generate larger effective control force due to its response amplification mechanism than a conventional brace system is evaluated. In addition, the nonlinear velocity amplification factor for the toggle brace—MR damper system and the effect of toggle configuration are considered. Analytical and experimental results show that control performance can be enhanced using the toggle brace system especially for the case in which the MR damper installed using non-amplifying brace system cannot provide sufficient response reduction.

Key Words: toggle bracing system • MR damper • seismic response control.


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