Assessment of seismic behaviour of steel frame structures with base isolator and similar slenderness ratio using 3D modelling

In this paper, 3D evaluation of performance of seismic rubber isolators with lead core in fixed steel structures at the base and same slenderness ratios under far field earthquakes have been assessed. Thus, three steel structures 6, 9 and 12 stories have been considered with resistant system of inte...

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Autores principales:	Fazel Azarbad, Reza Vahdani, Mohammad Iman Khodakarami
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	structural control seismic isolation slenderness ratio 3d time-history analysis moment resistant frame steel structure Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/9680d802a1054b1f9e5578a3641a2654
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spelling	oai:doaj.org-article:9680d802a1054b1f9e5578a3641a26542021-11-08T15:50:45ZAssessment of seismic behaviour of steel frame structures with base isolator and similar slenderness ratio using 3D modelling2476-39772538-261610.22065/jsce.2017.80257.1117https://doaj.org/article/9680d802a1054b1f9e5578a3641a26542019-02-01T00:00:00Zhttps://www.jsce.ir/article_51247_025a495dd0272974b1fc5036534950e9.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616In this paper, 3D evaluation of performance of seismic rubber isolators with lead core in fixed steel structures at the base and same slenderness ratios under far field earthquakes have been assessed. Thus, three steel structures 6, 9 and 12 stories have been considered with resistant system of intermediate moment frame as 3D. Rubber isolators have mounted on the base level of structures. Models of controlled and not controlled with seismic isolation systems have been under 7 far field earthquake records. According to conducted analyses, the performance of this control system with purpose of the most reduction in displacement, drift ratio and maximum stories shear under studied earthquakes has obtained. In last researches, it was usually considered a constant plan for different heights and just assessed height influence which caused rigidity of shorter structures increased and subsequently caused increasing positive performance of isolation at that structure; but in this paper, structures plan change with height to influence of height increasing while same slenderness ratio investigate on seismic isolation performance. Results indicate seismic isolator with goal of controlling maximum values of displacement, drift ratio, acceleration and maximum stories shear among studied structures and considering response in both x and y directions, at structure 9 stories has shown better performance. In this structure, seismic isolation cause reduction more than 27% in displacements, 70% in drift and 31% in roof story acceleration and 31% in base shear of structure.Fazel AzarbadReza VahdaniMohammad Iman KhodakaramiIranian Society of Structrual Engineering (ISSE)articlestructural controlseismic isolationslenderness ratio3d time-history analysismoment resistant framesteel structureBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 5, Iss 4, Pp 76-92 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	structural control seismic isolation slenderness ratio 3d time-history analysis moment resistant frame steel structure Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	structural control seismic isolation slenderness ratio 3d time-history analysis moment resistant frame steel structure Bridge engineering TG1-470 Building construction TH1-9745 Fazel Azarbad Reza Vahdani Mohammad Iman Khodakarami Assessment of seismic behaviour of steel frame structures with base isolator and similar slenderness ratio using 3D modelling
description	In this paper, 3D evaluation of performance of seismic rubber isolators with lead core in fixed steel structures at the base and same slenderness ratios under far field earthquakes have been assessed. Thus, three steel structures 6, 9 and 12 stories have been considered with resistant system of intermediate moment frame as 3D. Rubber isolators have mounted on the base level of structures. Models of controlled and not controlled with seismic isolation systems have been under 7 far field earthquake records. According to conducted analyses, the performance of this control system with purpose of the most reduction in displacement, drift ratio and maximum stories shear under studied earthquakes has obtained. In last researches, it was usually considered a constant plan for different heights and just assessed height influence which caused rigidity of shorter structures increased and subsequently caused increasing positive performance of isolation at that structure; but in this paper, structures plan change with height to influence of height increasing while same slenderness ratio investigate on seismic isolation performance. Results indicate seismic isolator with goal of controlling maximum values of displacement, drift ratio, acceleration and maximum stories shear among studied structures and considering response in both x and y directions, at structure 9 stories has shown better performance. In this structure, seismic isolation cause reduction more than 27% in displacements, 70% in drift and 31% in roof story acceleration and 31% in base shear of structure.
format	article
author	Fazel Azarbad Reza Vahdani Mohammad Iman Khodakarami
author_facet	Fazel Azarbad Reza Vahdani Mohammad Iman Khodakarami
author_sort	Fazel Azarbad
title	Assessment of seismic behaviour of steel frame structures with base isolator and similar slenderness ratio using 3D modelling
title_short	Assessment of seismic behaviour of steel frame structures with base isolator and similar slenderness ratio using 3D modelling
title_full	Assessment of seismic behaviour of steel frame structures with base isolator and similar slenderness ratio using 3D modelling
title_fullStr	Assessment of seismic behaviour of steel frame structures with base isolator and similar slenderness ratio using 3D modelling
title_full_unstemmed	Assessment of seismic behaviour of steel frame structures with base isolator and similar slenderness ratio using 3D modelling
title_sort	assessment of seismic behaviour of steel frame structures with base isolator and similar slenderness ratio using 3d modelling
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/9680d802a1054b1f9e5578a3641a2654
work_keys_str_mv	AT fazelazarbad assessmentofseismicbehaviourofsteelframestructureswithbaseisolatorandsimilarslendernessratiousing3dmodelling AT rezavahdani assessmentofseismicbehaviourofsteelframestructureswithbaseisolatorandsimilarslendernessratiousing3dmodelling AT mohammadimankhodakarami assessmentofseismicbehaviourofsteelframestructureswithbaseisolatorandsimilarslendernessratiousing3dmodelling
_version_	1718441685280620544

Assessment of seismic behaviour of steel frame structures with base isolator and similar slenderness ratio using 3D modelling

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