Efficiency of tuned liquid dampers in mitigating vibration of a plan-irregular structure

Many researches showed that one of the major causes of buildings collapse and damage might directly or indirectly due to irregular structural configuration. The buildings with regular geometry and uniformly distributed mass and stiffness in plan were suffered much less damage compared to irregular c...

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Main Author:	Teh, Kun Jie
Format:	Thesis
Language:	English
Published:	2019
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/81384/1/TehKunJieMSKA2019.pdf
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spelling	my-utm-ep.813842019-08-23T04:06:58Z Efficiency of tuned liquid dampers in mitigating vibration of a plan-irregular structure 2019 Teh, Kun Jie TA Engineering (General). Civil engineering (General) Many researches showed that one of the major causes of buildings collapse and damage might directly or indirectly due to irregular structural configuration. The buildings with regular geometry and uniformly distributed mass and stiffness in plan were suffered much less damage compared to irregular configurations. Tuned liquid dampers (TLDs) have been proposed in the past studies that were used to control the dynamic response of regular structures. In this study, the effect of the mass ratio of a rectangular TLD for suppressing dynamic responses of a plan-irregular structure was determined. The performance in term of displacement and acceleration responses when subjected to the base harmonic excitation was obtained experimentally. The structure is subjected to the free vibration and harmonic forced vibration tests with and without the presence of TLDs. The effects of the structure-TLD system with a mass ratio of 1% to 5% and bare structure system in varied plan distribution of mass were measured and investigated. This distance between the centroid and the mass for the plan-irregular condition will be 0.15m and 0.3m. In short, the damping ability was achieved with a higher mass ratio. The eccentricity did not strongly affect the damping ability of the plan-irregular structure. The dynamic responses were reduced by increasing the mass ratio of structure-TLD systems at resonance in regular structure while it is not performed similarly in plan-irregular structure. However, a mass ratio of 5% was still found to be the optimum system for peak acceleration responses control whereas a mass ratio of 5% was found to be a vital reduction of displacement responses only at the resonance frequency of 1.2Hz and above. 2019 Thesis http://eprints.utm.my/id/eprint/81384/ http://eprints.utm.my/id/eprint/81384/1/TehKunJieMSKA2019.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:124987 masters Universiti Teknologi Malaysia Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Teh, Kun Jie Efficiency of tuned liquid dampers in mitigating vibration of a plan-irregular structure
description	Many researches showed that one of the major causes of buildings collapse and damage might directly or indirectly due to irregular structural configuration. The buildings with regular geometry and uniformly distributed mass and stiffness in plan were suffered much less damage compared to irregular configurations. Tuned liquid dampers (TLDs) have been proposed in the past studies that were used to control the dynamic response of regular structures. In this study, the effect of the mass ratio of a rectangular TLD for suppressing dynamic responses of a plan-irregular structure was determined. The performance in term of displacement and acceleration responses when subjected to the base harmonic excitation was obtained experimentally. The structure is subjected to the free vibration and harmonic forced vibration tests with and without the presence of TLDs. The effects of the structure-TLD system with a mass ratio of 1% to 5% and bare structure system in varied plan distribution of mass were measured and investigated. This distance between the centroid and the mass for the plan-irregular condition will be 0.15m and 0.3m. In short, the damping ability was achieved with a higher mass ratio. The eccentricity did not strongly affect the damping ability of the plan-irregular structure. The dynamic responses were reduced by increasing the mass ratio of structure-TLD systems at resonance in regular structure while it is not performed similarly in plan-irregular structure. However, a mass ratio of 5% was still found to be the optimum system for peak acceleration responses control whereas a mass ratio of 5% was found to be a vital reduction of displacement responses only at the resonance frequency of 1.2Hz and above.
format	Thesis
qualification_level	Master's degree
author	Teh, Kun Jie
author_facet	Teh, Kun Jie
author_sort	Teh, Kun Jie
title	Efficiency of tuned liquid dampers in mitigating vibration of a plan-irregular structure
title_short	Efficiency of tuned liquid dampers in mitigating vibration of a plan-irregular structure
title_full	Efficiency of tuned liquid dampers in mitigating vibration of a plan-irregular structure
title_fullStr	Efficiency of tuned liquid dampers in mitigating vibration of a plan-irregular structure
title_full_unstemmed	Efficiency of tuned liquid dampers in mitigating vibration of a plan-irregular structure
title_sort	efficiency of tuned liquid dampers in mitigating vibration of a plan-irregular structure
granting_institution	Universiti Teknologi Malaysia
granting_department	Civil Engineering
publishDate	2019
url	http://eprints.utm.my/id/eprint/81384/1/TehKunJieMSKA2019.pdf
_version_	1747818318721449984

Efficiency of tuned liquid dampers in mitigating vibration of a plan-irregular structure

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