Assessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes

The present article involves evaluating the efficiency of an active viscous damper in controlling vibrations caused by near and far field earthquakes. Being installed on chevron bracing systems, the damper is able to provide necessary controlling forces to diminish vibration amplitude up to its'...

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Autores principales:	Ali Jalaeefar, Mahdi Kiani
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2021
Materias:	active viscous damper instantaneous optimal control near field earthquake far field earthquake acceleration velocity displacement Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/a1c3b99195da4146b66a5b45d37d93df
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spelling	oai:doaj.org-article:a1c3b99195da4146b66a5b45d37d93df2021-11-08T15:55:01ZAssessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes2476-39772538-261610.22065/jsce.2020.197694.1927https://doaj.org/article/a1c3b99195da4146b66a5b45d37d93df2021-08-01T00:00:00Zhttps://www.jsce.ir/article_104343_29d12576136c84367d5e73471a35a129.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616The present article involves evaluating the efficiency of an active viscous damper in controlling vibrations caused by near and far field earthquakes. Being installed on chevron bracing systems, the damper is able to provide necessary controlling forces to diminish vibration amplitude up to its' saturation limit. Many researchers have worked on the concept of seismic active control under far field waves. But the efficiency of this system is not guaranteed in near field ones due to time delay phenomenon. Pulse and shock entity of near field seismic waves leads to decreasing active control effects and the present research also proves the fact. A computer based algorithm is developed using Newmark instantaneous optimal control method in MATLAB software.The performance of this code is validated and evaluated based on three different reference problems. Then the analysis results of a 7-storey structure are calculated based on the code. The analyses are developed using both controlled and uncontrolled states. Also near field and far field earthquake records are used in this process and the results are compared in different tables and graphs. Based on the results, it seems that active control systems in spite of their effectiveness in near field earthquakes, needs necessary scheming and changes in the process.Ali JalaeefarMahdi KianiIranian Society of Structrual Engineering (ISSE)articleactive viscous damperinstantaneous optimal controlnear field earthquakefar field earthquakeaccelerationvelocitydisplacementBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 8, Iss 6, Pp 280-300 (2021)
institution	DOAJ
collection	DOAJ
language	FA
topic	active viscous damper instantaneous optimal control near field earthquake far field earthquake acceleration velocity displacement Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	active viscous damper instantaneous optimal control near field earthquake far field earthquake acceleration velocity displacement Bridge engineering TG1-470 Building construction TH1-9745 Ali Jalaeefar Mahdi Kiani Assessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes
description	The present article involves evaluating the efficiency of an active viscous damper in controlling vibrations caused by near and far field earthquakes. Being installed on chevron bracing systems, the damper is able to provide necessary controlling forces to diminish vibration amplitude up to its' saturation limit. Many researchers have worked on the concept of seismic active control under far field waves. But the efficiency of this system is not guaranteed in near field ones due to time delay phenomenon. Pulse and shock entity of near field seismic waves leads to decreasing active control effects and the present research also proves the fact. A computer based algorithm is developed using Newmark instantaneous optimal control method in MATLAB software.The performance of this code is validated and evaluated based on three different reference problems. Then the analysis results of a 7-storey structure are calculated based on the code. The analyses are developed using both controlled and uncontrolled states. Also near field and far field earthquake records are used in this process and the results are compared in different tables and graphs. Based on the results, it seems that active control systems in spite of their effectiveness in near field earthquakes, needs necessary scheming and changes in the process.
format	article
author	Ali Jalaeefar Mahdi Kiani
author_facet	Ali Jalaeefar Mahdi Kiani
author_sort	Ali Jalaeefar
title	Assessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes
title_short	Assessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes
title_full	Assessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes
title_fullStr	Assessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes
title_full_unstemmed	Assessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes
title_sort	assessing the efficiency of an active viscous damper in near-field and far-field earthquakes
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2021
url	https://doaj.org/article/a1c3b99195da4146b66a5b45d37d93df
work_keys_str_mv	AT alijalaeefar assessingtheefficiencyofanactiveviscousdamperinnearfieldandfarfieldearthquakes AT mahdikiani assessingtheefficiencyofanactiveviscousdamperinnearfieldandfarfieldearthquakes
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Assessing the Efficiency of an Active Viscous Damper in Near-Field and Far-Field Earthquakes

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