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Title |
Performance Evaluation of Multi-Friction Dampers for Seismic Retrofitting of Structures
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Authors |
김성배(Sung-Bae Kim) ; 권형오(Hyung-O Kwon) ; 이종석(Jong-Suk Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2022.26.6.54 |
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Keywords |
마찰댐퍼; 초고분자량 폴리에틸렌; 다중 마찰댐퍼; 디스크 스프링; 지진하중 시험 Friction damper; Ultra high molecular weight polyethylene (UHMWPE); Multi-friction damper; Disc spring; Seismic load test |
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Abstract |
This paper is a study on the friction damper, which is one of the seismic reinforcement devices for structures. This study developed a damperby replacing the internal friction material with ultra high molecular weight polyethylene (UHMWPE), a type of composite material. In addition, thisstudy applied a multi-friction method in which the internal structure where frictional force is generated is laminated in several layers. To verify theperformance of the developed multi-friction damper, this study performed a characteristic analysis test for the basic physical properties, wearcharacteristics, and disc springs of the material. As a result of the wear test, the mass reduction rate of UHMWPE was 0.003%, which showed thebest performance among the friction materials based on composite materials. Regarding the disc spring, this study secured the design basic data fromthe finite element analysis and experimental test results. Moreover, to confirm the quality stability of the developed multi-friction damper, this studyperformed an seismic load test on the damping device and the friction force change according to the torque value. The quality performance test resultshowed a linear frictional force change according to the torque value adjustment. As a result of the seismic load test, the allowable error of the frictiondamper was less than 15%, which is the standard required by the design standards, so it satisfies the requirements for seismic reinforcement devices.
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