Wind-induced vibration control of tall TV towers using a part of the main structure as a vibration absorber substructure

The present paper proposes a new control strategy to mitigate wind-induced vibrations of tall TV towers. Based on the proposed idea, a part of the main structure of the tower is isolated and regarded as a dynamic vibration absorber. In order to investigate the effectiveness of the proposed system, t...

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Autores principales:	Nahmat Khidaie, Houshyar Eimani kalehsar
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	wind-induced response response control dynamic vibration absorber frequency domain analysis self-control system Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/604b10c6d6ba4d798f93b38f243f50fc
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id	oai:doaj.org-article:604b10c6d6ba4d798f93b38f243f50fc
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spelling	oai:doaj.org-article:604b10c6d6ba4d798f93b38f243f50fc2021-11-08T15:52:40ZWind-induced vibration control of tall TV towers using a part of the main structure as a vibration absorber substructure2476-39772538-261610.22065/jsce.2018.95021.1285https://doaj.org/article/604b10c6d6ba4d798f93b38f243f50fc2019-08-01T00:00:00Zhttps://www.jsce.ir/article_58161_5068bd54c6d3cae9cce6b53d24aa6b0d.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616The present paper proposes a new control strategy to mitigate wind-induced vibrations of tall TV towers. Based on the proposed idea, a part of the main structure of the tower is isolated and regarded as a dynamic vibration absorber. In order to investigate the effectiveness of the proposed system, the 310-m tall Nanjing TV tower in China, which has two observation decks at the heights 180 m and 240 m, is studied. The wind-induced responses are obtained for the following cases: uncontrolled structure; controlled structure equipped with the TMD system; and the controlled structure with an isolated substructure at the upper observation deck level. The structure is modelled as a multi-degree-of-freedom (MDOF) lumped mass vertical cantilever beam. The TMD system and the isolated substructure are modelled as a lumped mass connected to the upper observation deck by a parallel stiffness and damper system. All the calculation works related to the frequency-domain analysis, optimizing the system, simulating the wind velocity, and the time-domain analysis are carried out using the MATLAB software. The results indicate that the proposed self-control structural system has higher vibration control capacity than the TMD system. The proposed system can effectively reduce the acceleration response of the structure and improve occupant comfort during critical wind speed. In the proposed system, since a part of the main structure performs as a vibration absorber, it is not required to assign a valuable space of the observation deck for the installation of an additional mass damper and the corresponding clearance to accommodate its large strokes.Nahmat KhidaieHoushyar Eimani kalehsarIranian Society of Structrual Engineering (ISSE)articlewind-induced responseresponse controldynamic vibration absorberfrequency domain analysisself-control systemBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss شماره ویژه 2, Pp 109-126 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	wind-induced response response control dynamic vibration absorber frequency domain analysis self-control system Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	wind-induced response response control dynamic vibration absorber frequency domain analysis self-control system Bridge engineering TG1-470 Building construction TH1-9745 Nahmat Khidaie Houshyar Eimani kalehsar Wind-induced vibration control of tall TV towers using a part of the main structure as a vibration absorber substructure
description	The present paper proposes a new control strategy to mitigate wind-induced vibrations of tall TV towers. Based on the proposed idea, a part of the main structure of the tower is isolated and regarded as a dynamic vibration absorber. In order to investigate the effectiveness of the proposed system, the 310-m tall Nanjing TV tower in China, which has two observation decks at the heights 180 m and 240 m, is studied. The wind-induced responses are obtained for the following cases: uncontrolled structure; controlled structure equipped with the TMD system; and the controlled structure with an isolated substructure at the upper observation deck level. The structure is modelled as a multi-degree-of-freedom (MDOF) lumped mass vertical cantilever beam. The TMD system and the isolated substructure are modelled as a lumped mass connected to the upper observation deck by a parallel stiffness and damper system. All the calculation works related to the frequency-domain analysis, optimizing the system, simulating the wind velocity, and the time-domain analysis are carried out using the MATLAB software. The results indicate that the proposed self-control structural system has higher vibration control capacity than the TMD system. The proposed system can effectively reduce the acceleration response of the structure and improve occupant comfort during critical wind speed. In the proposed system, since a part of the main structure performs as a vibration absorber, it is not required to assign a valuable space of the observation deck for the installation of an additional mass damper and the corresponding clearance to accommodate its large strokes.
format	article
author	Nahmat Khidaie Houshyar Eimani kalehsar
author_facet	Nahmat Khidaie Houshyar Eimani kalehsar
author_sort	Nahmat Khidaie
title	Wind-induced vibration control of tall TV towers using a part of the main structure as a vibration absorber substructure
title_short	Wind-induced vibration control of tall TV towers using a part of the main structure as a vibration absorber substructure
title_full	Wind-induced vibration control of tall TV towers using a part of the main structure as a vibration absorber substructure
title_fullStr	Wind-induced vibration control of tall TV towers using a part of the main structure as a vibration absorber substructure
title_full_unstemmed	Wind-induced vibration control of tall TV towers using a part of the main structure as a vibration absorber substructure
title_sort	wind-induced vibration control of tall tv towers using a part of the main structure as a vibration absorber substructure
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/604b10c6d6ba4d798f93b38f243f50fc
work_keys_str_mv	AT nahmatkhidaie windinducedvibrationcontroloftalltvtowersusingapartofthemainstructureasavibrationabsorbersubstructure AT houshyareimanikalehsar windinducedvibrationcontroloftalltvtowersusingapartofthemainstructureasavibrationabsorbersubstructure
_version_	1718441665215070208

Wind-induced vibration control of tall TV towers using a part of the main structure as a vibration absorber substructure

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