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    Seismic Vibration Control of a Building by Overhead Water Tank Designed as Slender Tuned Sloshing Damper

    Source: Practice Periodical on Structural Design and Construction:;2024:;Volume ( 029 ):;issue: 002::page 04023069-1
    Author:
    Tanmoy Konar
    DOI: 10.1061/PPSCFX.SCENG-1393
    Publisher: ASCE
    Abstract: The possibility of detuning resulting from liquid depth fluctuation and low damping characteristics for being deep tanks hinder the utilization of overhead water tanks (OWTs) as tuned sloshing dampers (TSDs). This paper proposes a slender TSD (STSD) that can effectively serve as OWT as well. Unlike conventional TSDs, in an STSD, the liquid depth is allowed to fluctuate within any practically feasible range maintaining the condition h/D≥1, where h is the liquid depth and D is the tank dimension along excitation. For h/D≥1, the frequency and the lumped mass representative of the fundamental sloshing mode become independent of h. To improve damping, STSDs are provided with equally spaced horizontal ring baffles. It is shown that the effective damping ratio of the STSD with equally spaced horizontal ring baffles also becomes practically constant for h/D≥1. Thus, a consistent damper performance is possible despite liquid depth fluctuation. The mathematical model of the damper system is described followed by the design of OWT cum STSD for a real-life apartment building. Significant seismic vibration control of the building by the damper is demonstrated through a numerical study that shows consistent performance by the STSD despite 66.7% liquid depth fluctuation in the tank. The performance of the STSD is found to be comparable with conventional TSD.
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      Seismic Vibration Control of a Building by Overhead Water Tank Designed as Slender Tuned Sloshing Damper

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4297052
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    contributor authorTanmoy Konar
    date accessioned2024-04-27T22:36:16Z
    date available2024-04-27T22:36:16Z
    date issued2024/05/01
    identifier other10.1061-PPSCFX.SCENG-1393.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4297052
    description abstractThe possibility of detuning resulting from liquid depth fluctuation and low damping characteristics for being deep tanks hinder the utilization of overhead water tanks (OWTs) as tuned sloshing dampers (TSDs). This paper proposes a slender TSD (STSD) that can effectively serve as OWT as well. Unlike conventional TSDs, in an STSD, the liquid depth is allowed to fluctuate within any practically feasible range maintaining the condition h/D≥1, where h is the liquid depth and D is the tank dimension along excitation. For h/D≥1, the frequency and the lumped mass representative of the fundamental sloshing mode become independent of h. To improve damping, STSDs are provided with equally spaced horizontal ring baffles. It is shown that the effective damping ratio of the STSD with equally spaced horizontal ring baffles also becomes practically constant for h/D≥1. Thus, a consistent damper performance is possible despite liquid depth fluctuation. The mathematical model of the damper system is described followed by the design of OWT cum STSD for a real-life apartment building. Significant seismic vibration control of the building by the damper is demonstrated through a numerical study that shows consistent performance by the STSD despite 66.7% liquid depth fluctuation in the tank. The performance of the STSD is found to be comparable with conventional TSD.
    publisherASCE
    titleSeismic Vibration Control of a Building by Overhead Water Tank Designed as Slender Tuned Sloshing Damper
    typeJournal Article
    journal volume29
    journal issue2
    journal titlePractice Periodical on Structural Design and Construction
    identifier doi10.1061/PPSCFX.SCENG-1393
    journal fristpage04023069-1
    journal lastpage04023069-11
    page11
    treePractice Periodical on Structural Design and Construction:;2024:;Volume ( 029 ):;issue: 002
    contenttypeFulltext
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