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http://dx.doi.org/10.11112/jksmi.2022.26.6.54

Performance Evaluation of Multi-Friction Dampers for Seismic Retrofitting of Structures  

Kim, Sung-Bae ((주)제이원산업)
Kwon, Hyung-O (주식회사 브이테크)
Lee, Jong-Suk (한국건설생환환경시험연구원)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.26, no.6, 2022 , pp. 54-63 More about this Journal
Abstract
This paper is a study on the friction damper, which is one of the seismic reinforcement devices for structures. This study developed a damper by replacing the internal friction material with ultra high molecular weight polyethylene (UHMWPE), a type of composite material. In addition, this study applied a multi-friction method in which the internal structure where frictional force is generated is laminated in several layers. To verify the performance of the developed multi-friction damper, this study performed a characteristic analysis test for the basic physical properties, wear characteristics, and disc springs of the material. As a result of the wear test, the mass reduction rate of UHMWPE was 0.003%, which showed the best performance among the friction materials based on composite materials. Regarding the disc spring, this study secured the design basic data from the finite element analysis and experimental test results. Moreover, to confirm the quality stability of the developed multi-friction damper, this study performed an seismic load test on the damping device and the friction force change according to the torque value. The quality performance test result showed a linear frictional force change according to the torque value adjustment. As a result of the seismic load test, the allowable error of the friction damper was less than 15%, which is the standard required by the design standards, so it satisfies the requirements for seismic reinforcement devices.
Keywords
Friction damper; Ultra high molecular weight polyethylene (UHMWPE); Multi-friction damper; Disc spring; Seismic load test;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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