Seismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers

High-rise television transmission towers are of low damping and may vibrate excessively when subjected to strong earthquakes. Various dynamic absorbers and dampers are proposed to protect television transmission towers from excessive vibrations and damages. Up to now, the seismic damage reduction in...

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Autores principales:	Jingbo Wu, Bo Chen, Lunhai Zhi, Xinxin Song
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	television transmission tower seismic excitation shape memory alloy damper parametric study vibration control Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/5a8d7e288b544273bc8503957ad39d86
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spelling	oai:doaj.org-article:5a8d7e288b544273bc8503957ad39d862021-11-25T18:15:31ZSeismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers10.3390/ma142269871996-1944https://doaj.org/article/5a8d7e288b544273bc8503957ad39d862021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6987https://doaj.org/toc/1996-1944High-rise television transmission towers are of low damping and may vibrate excessively when subjected to strong earthquakes. Various dynamic absorbers and dampers are proposed to protect television transmission towers from excessive vibrations and damages. Up to now, the seismic damage reduction in television towers, using SMA dampers under seismic excitations, has not been conducted. To this end, the response reduction in a flexible television tower, disturbed by earthquakes using SMA dampers, is conducted in this study. A two-dimensional dynamic model is developed for dynamic computation at first. The mathematical model of an SMA damper is proposed, and the equations of motion of the tower, without and with, are established, respectively. The structural dynamic responses are examined in the time and the frequency domain, respectively. The effects of damper stiffness, service temperature, hysteresis loops, and earthquake intensity on control efficacy are investigated in detail. In addition, the power spectrum density curves, of dynamic responses and the energy responses, are compared to provide deep insights into the developed control approach. The control performance of SMA dampers is compared with that of widely-used friction dampers. The analytical observations indicate that SMA dampers with optimal parameters can substantially reduce the vibrations of TV transmission towers under seismic excitations.Jingbo WuBo ChenLunhai ZhiXinxin SongMDPI AGarticletelevision transmission towerseismic excitationshape memory alloy damperparametric studyvibration controlTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6987, p 6987 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	television transmission tower seismic excitation shape memory alloy damper parametric study vibration control Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	television transmission tower seismic excitation shape memory alloy damper parametric study vibration control Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Jingbo Wu Bo Chen Lunhai Zhi Xinxin Song Seismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers
description	High-rise television transmission towers are of low damping and may vibrate excessively when subjected to strong earthquakes. Various dynamic absorbers and dampers are proposed to protect television transmission towers from excessive vibrations and damages. Up to now, the seismic damage reduction in television towers, using SMA dampers under seismic excitations, has not been conducted. To this end, the response reduction in a flexible television tower, disturbed by earthquakes using SMA dampers, is conducted in this study. A two-dimensional dynamic model is developed for dynamic computation at first. The mathematical model of an SMA damper is proposed, and the equations of motion of the tower, without and with, are established, respectively. The structural dynamic responses are examined in the time and the frequency domain, respectively. The effects of damper stiffness, service temperature, hysteresis loops, and earthquake intensity on control efficacy are investigated in detail. In addition, the power spectrum density curves, of dynamic responses and the energy responses, are compared to provide deep insights into the developed control approach. The control performance of SMA dampers is compared with that of widely-used friction dampers. The analytical observations indicate that SMA dampers with optimal parameters can substantially reduce the vibrations of TV transmission towers under seismic excitations.
format	article
author	Jingbo Wu Bo Chen Lunhai Zhi Xinxin Song
author_facet	Jingbo Wu Bo Chen Lunhai Zhi Xinxin Song
author_sort	Jingbo Wu
title	Seismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers
title_short	Seismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers
title_full	Seismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers
title_fullStr	Seismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers
title_full_unstemmed	Seismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers
title_sort	seismic response mitigation of a television transmission tower by shape memory alloy dampers
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5a8d7e288b544273bc8503957ad39d86
work_keys_str_mv	AT jingbowu seismicresponsemitigationofatelevisiontransmissiontowerbyshapememoryalloydampers AT bochen seismicresponsemitigationofatelevisiontransmissiontowerbyshapememoryalloydampers AT lunhaizhi seismicresponsemitigationofatelevisiontransmissiontowerbyshapememoryalloydampers AT xinxinsong seismicresponsemitigationofatelevisiontransmissiontowerbyshapememoryalloydampers
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Seismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers

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