Investigation of Combined Steel-Concrete Structures with Inter-Story Seismic Isolator in Near-Fault Field

Seismic isolation systems represent one of the most effective solutions to reduce near-fault damages; the systems can be used at either foundation or story levels. The main advantage of seismic isolation system is that it increases fundamental period of structure to longer periods. Among other advan...

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Autores principales:	Ali Asghar Mortazavi, Pouria Maleki, Hamid Saffari
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2020
Materias:	base isolation steel-concrete composite structures dynamic analysis structural dynamics near fault earthquake Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/96dfa607e29848cf8b472bfe84c81d9d
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spelling	oai:doaj.org-article:96dfa607e29848cf8b472bfe84c81d9d2021-11-08T15:53:21ZInvestigation of Combined Steel-Concrete Structures with Inter-Story Seismic Isolator in Near-Fault Field2476-39772538-261610.22065/jsce.2018.121502.1493https://doaj.org/article/96dfa607e29848cf8b472bfe84c81d9d2020-09-01T00:00:00Zhttps://www.jsce.ir/article_73682_d9fb8be9278aa1048ca3a14fcf1d3cbc.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Seismic isolation systems represent one of the most effective solutions to reduce near-fault damages; the systems can be used at either foundation or story levels. The main advantage of seismic isolation system is that it increases fundamental period of structure to longer periods. Among other advantages of seismic isolators, one can refer to the dissipation of input energy into the structure which lowers the transmitted acceleration to the above structure. In the present research, performance of combined concrete-steel structures with or without seismic isolation systems at story level, are investigated under near-field earthquakes. For this purpose, three structures of 4, 7, and 10 stories with/without seismic Lead Rubber Bearing (LRB) isolation systems with different damping ratios and periods were modelled. The analysis results indicate that, the isolation systems of longer period and smaller damping ratio were associated with lower relative displacement, acceleration and base shear, improving the structure performance. Results of analysis show that, with increasing the structure height (compare the results of the 10 story building with those of the 4 and 7 story counterparts), variations in base shear is reduced in the models with different isolation systems; i.e. the taller the structure, the more faded the role of the isolator. Furthermore, a study of the variations of damping ratio and period of isolator makes it obvious that, with increasing the period of isolators, shear force of the stories in the isolated structures decreases, while it slightly increases with increasing the damping percentage of the isolator.Ali Asghar MortazaviPouria MalekiHamid SaffariIranian Society of Structrual Engineering (ISSE)articlebase isolationsteel-concrete composite structuresdynamic analysisstructural dynamicsnear fault earthquakeBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 7, Iss 3, Pp 148-164 (2020)
institution	DOAJ
collection	DOAJ
language	FA
topic	base isolation steel-concrete composite structures dynamic analysis structural dynamics near fault earthquake Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	base isolation steel-concrete composite structures dynamic analysis structural dynamics near fault earthquake Bridge engineering TG1-470 Building construction TH1-9745 Ali Asghar Mortazavi Pouria Maleki Hamid Saffari Investigation of Combined Steel-Concrete Structures with Inter-Story Seismic Isolator in Near-Fault Field
description	Seismic isolation systems represent one of the most effective solutions to reduce near-fault damages; the systems can be used at either foundation or story levels. The main advantage of seismic isolation system is that it increases fundamental period of structure to longer periods. Among other advantages of seismic isolators, one can refer to the dissipation of input energy into the structure which lowers the transmitted acceleration to the above structure. In the present research, performance of combined concrete-steel structures with or without seismic isolation systems at story level, are investigated under near-field earthquakes. For this purpose, three structures of 4, 7, and 10 stories with/without seismic Lead Rubber Bearing (LRB) isolation systems with different damping ratios and periods were modelled. The analysis results indicate that, the isolation systems of longer period and smaller damping ratio were associated with lower relative displacement, acceleration and base shear, improving the structure performance. Results of analysis show that, with increasing the structure height (compare the results of the 10 story building with those of the 4 and 7 story counterparts), variations in base shear is reduced in the models with different isolation systems; i.e. the taller the structure, the more faded the role of the isolator. Furthermore, a study of the variations of damping ratio and period of isolator makes it obvious that, with increasing the period of isolators, shear force of the stories in the isolated structures decreases, while it slightly increases with increasing the damping percentage of the isolator.
format	article
author	Ali Asghar Mortazavi Pouria Maleki Hamid Saffari
author_facet	Ali Asghar Mortazavi Pouria Maleki Hamid Saffari
author_sort	Ali Asghar Mortazavi
title	Investigation of Combined Steel-Concrete Structures with Inter-Story Seismic Isolator in Near-Fault Field
title_short	Investigation of Combined Steel-Concrete Structures with Inter-Story Seismic Isolator in Near-Fault Field
title_full	Investigation of Combined Steel-Concrete Structures with Inter-Story Seismic Isolator in Near-Fault Field
title_fullStr	Investigation of Combined Steel-Concrete Structures with Inter-Story Seismic Isolator in Near-Fault Field
title_full_unstemmed	Investigation of Combined Steel-Concrete Structures with Inter-Story Seismic Isolator in Near-Fault Field
title_sort	investigation of combined steel-concrete structures with inter-story seismic isolator in near-fault field
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2020
url	https://doaj.org/article/96dfa607e29848cf8b472bfe84c81d9d
work_keys_str_mv	AT aliasgharmortazavi investigationofcombinedsteelconcretestructureswithinterstoryseismicisolatorinnearfaultfield AT pouriamaleki investigationofcombinedsteelconcretestructureswithinterstoryseismicisolatorinnearfaultfield AT hamidsaffari investigationofcombinedsteelconcretestructureswithinterstoryseismicisolatorinnearfaultfield
_version_	1718441587082526720

Investigation of Combined Steel-Concrete Structures with Inter-Story Seismic Isolator in Near-Fault Field

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