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Shared Tuned Mass Dampers for Mitigation of Seismic Pounding

Shared Tuned Mass Dampers for Mitigation of Seismic Pounding

Title: Shared Tuned Mass Dampers for Mitigation of Seismic Pounding
Author: Rupakhety, Rajesh   orcid.org/0000-0003-3504-3687
Elias, Said   orcid.org/0000-0002-8231-9765
Ólafsson, Símon
Date: 2020-03-11
Language: English
Scope: 1918
University/Institute: Háskóli Íslands
University of Iceland
School: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Department: Umhverfis- og byggingarverkfræðideild (HÍ)
Faculty of Civil and Environmental Engineering (UI)
Series: Applied Sciences;10(6)
ISSN: 2076-3417
DOI: 10.3390/app10061918
Subject: Adjacent buildings; Seismic pounding; Tuned mass damper; Jarðskjálftaverkfræði
URI: https://hdl.handle.net/20.500.11815/2407

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Rupakhety R, Elias S, Olafsson S. Shared Tuned Mass Dampers for Mitigation of Seismic Pounding. Applied Sciences. 2020; 10(6):1918.


This study explores the effectiveness of shared tuned mass damper (STMD) in reducing seismic pounding of adjacent buildings. The dynamics of STMDs is explored through numerical simulations of buildings idealized as single and multiple degree of freedom oscillators. An optimization method proposed in the literature is revisited. It is shown that the optimization results in two different solutions. The first one corresponds to the device being tuned to one of the buildings it is attached to. The second solution corresponds to a very stiff system where the TMD mass hardly moves. This solution, which has been described as an STMD in the literature, is shown to be impractical due to its high stiffness and use of a heavy stationary mass that plays no role in response mitigation but adds unnecessary load to the structure. Furthermore, it is shown that the second solution is equivalent to a viscous coupling of the two buildings. As for the properly tuned solution, i.e., the first solution, sharing the device with an adjacent building was found to provide no added benefits compared to when it is placed on one of the buildings. Based on results from a large set of real earthquake ground motions, it is shown that sharing a TMD mass with an adjacent building, in contrary to what is reported in the literature, is not an effective strategy.


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