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Hysteresis response of rotary friction dampers developed for seismic operational performance of non-structural components vulnerable to overturning

Authors
Lee, S.-J.Choi, K.-K.Lee, J.-E.Hieu, Dinh N.Park, W.-I.
Issue Date
Sep-2022
Publisher
Elsevier Ltd
Keywords
Hysteresis response; Non-structural components; Operational performance; Rotary friction damper; Seismic performance
Citation
Structures, v.43, pp.1447 - 1462
Journal Title
Structures
Volume
43
Start Page
1447
End Page
1462
URI
http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/42461
DOI
10.1016/j.istruc.2022.07.046
ISSN
2352-0124
Abstract
The electrical facilities in buildings play important roles in maintaining operational performance during and after earthquakes. In this study, rotary friction dampers were developed for electrical facilities vulnerable to overturning, and cyclic loading tests were performed for the corresponding sub-assemblies (comprising friction plates), aiming to investigate the hysteresis response(s) of the friction dampers. The primary test parameters included the number of bolts used for fabricating the friction plates, torque applied to the bolts for their fixation to the friction plates, and cyclic loading frequency. In total, three series of 24 full-scale friction damper specimens were fabricated and tested according to the guidelines specified in the Korean seismic design standard (KDS 41 17, 2019). Based on the test results, the mechanical characteristics and seismic performance of the friction dampers were assessed and investigated in details. A macro-analytical model was developed to simulate the load–displacement response of the friction dampers, and its prediction showed a good correlation with the experimental results. Finally, dynamic analysis was performed by applying the developed friction damper to the entire system (mold transformer). As a result of the analysis, the response displacement of the detail with friction damper was reduced by about 95% in the X-direction and about 70% in the Y-direction compared to the displacement of the conventional detail. © 2022 Institution of Structural Engineers
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College of Engineering (School of Architecture)
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