Investigating the effect of extremely low cyclic fatigue in steel moment frames with reduced beam section connections

Studies on damaged connections in recent earthquakes have shown that damage to some of the structures cannot be justified by the use of common failure mechanisms. This is due to the extremely low cyclic fatigue created by the critical cycle on the connections, which leads to a failure in the examine...

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Autores principales:	Mohsen Ghaderi, Mohsen Gerami, Reza Vahdani
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2020
Materias:	extremely low cycle fatigue steel moment frame reduced beam section connection earthquake failure Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/1c50ead9112849f19f6a23aabd072d2a
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spelling	oai:doaj.org-article:1c50ead9112849f19f6a23aabd072d2a2021-11-08T15:53:20ZInvestigating the effect of extremely low cyclic fatigue in steel moment frames with reduced beam section connections2476-39772538-261610.22065/jsce.2018.127480.1526https://doaj.org/article/1c50ead9112849f19f6a23aabd072d2a2020-09-01T00:00:00Zhttps://www.jsce.ir/article_70566_d0eb52f4591543f5eee965a2e8125c0d.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Studies on damaged connections in recent earthquakes have shown that damage to some of the structures cannot be justified by the use of common failure mechanisms. This is due to the extremely low cyclic fatigue created by the critical cycle on the connections, which leads to a failure in the examined connections. In recent years, a lot of research efforts have been made to create a method for predicting a failure due to extremely low cycle fatigue to interpret the failure mechanism in steel materials and structural components. It can be said that the failure is due to the extremely low cycle fatigue state governing the steel structures in severe earthquakes. On the other hand, after the Northridge earthquake, the use of moment connection with reduced beam section, which showed good ductility in laboratory studies, expanded rapidly. But studies on this kind of connection have focused on capacity, and the extremely low cycle fatigue and failure mechanisms in this type of connection have not been considered. The present study focuses on the effect of extremely low cyclic fatigue on damaged connections with reduced beam section beams in moment steel frames. In this regard, the effects of extremely low cyclic fatigue were studied in a 6-story steel moment frame complex with reduced beam sections. Comparison of the indices of start cracking by extremely low cycle fatigue in different floor showed that this index is far from the beginning of the failure. In other words, the connections with reduced beam sections in this structure will not damage by extremely low cycle fatigue.Mohsen GhaderiMohsen GeramiReza VahdaniIranian Society of Structrual Engineering (ISSE)articleextremely low cycle fatiguesteel moment framereduced beam section connectionearthquakefailureBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 7, Iss 3, Pp 5-19 (2020)
institution	DOAJ
collection	DOAJ
language	FA
topic	extremely low cycle fatigue steel moment frame reduced beam section connection earthquake failure Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	extremely low cycle fatigue steel moment frame reduced beam section connection earthquake failure Bridge engineering TG1-470 Building construction TH1-9745 Mohsen Ghaderi Mohsen Gerami Reza Vahdani Investigating the effect of extremely low cyclic fatigue in steel moment frames with reduced beam section connections
description	Studies on damaged connections in recent earthquakes have shown that damage to some of the structures cannot be justified by the use of common failure mechanisms. This is due to the extremely low cyclic fatigue created by the critical cycle on the connections, which leads to a failure in the examined connections. In recent years, a lot of research efforts have been made to create a method for predicting a failure due to extremely low cycle fatigue to interpret the failure mechanism in steel materials and structural components. It can be said that the failure is due to the extremely low cycle fatigue state governing the steel structures in severe earthquakes. On the other hand, after the Northridge earthquake, the use of moment connection with reduced beam section, which showed good ductility in laboratory studies, expanded rapidly. But studies on this kind of connection have focused on capacity, and the extremely low cycle fatigue and failure mechanisms in this type of connection have not been considered. The present study focuses on the effect of extremely low cyclic fatigue on damaged connections with reduced beam section beams in moment steel frames. In this regard, the effects of extremely low cyclic fatigue were studied in a 6-story steel moment frame complex with reduced beam sections. Comparison of the indices of start cracking by extremely low cycle fatigue in different floor showed that this index is far from the beginning of the failure. In other words, the connections with reduced beam sections in this structure will not damage by extremely low cycle fatigue.
format	article
author	Mohsen Ghaderi Mohsen Gerami Reza Vahdani
author_facet	Mohsen Ghaderi Mohsen Gerami Reza Vahdani
author_sort	Mohsen Ghaderi
title	Investigating the effect of extremely low cyclic fatigue in steel moment frames with reduced beam section connections
title_short	Investigating the effect of extremely low cyclic fatigue in steel moment frames with reduced beam section connections
title_full	Investigating the effect of extremely low cyclic fatigue in steel moment frames with reduced beam section connections
title_fullStr	Investigating the effect of extremely low cyclic fatigue in steel moment frames with reduced beam section connections
title_full_unstemmed	Investigating the effect of extremely low cyclic fatigue in steel moment frames with reduced beam section connections
title_sort	investigating the effect of extremely low cyclic fatigue in steel moment frames with reduced beam section connections
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2020
url	https://doaj.org/article/1c50ead9112849f19f6a23aabd072d2a
work_keys_str_mv	AT mohsenghaderi investigatingtheeffectofextremelylowcyclicfatigueinsteelmomentframeswithreducedbeamsectionconnections AT mohsengerami investigatingtheeffectofextremelylowcyclicfatigueinsteelmomentframeswithreducedbeamsectionconnections AT rezavahdani investigatingtheeffectofextremelylowcyclicfatigueinsteelmomentframeswithreducedbeamsectionconnections
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Investigating the effect of extremely low cyclic fatigue in steel moment frames with reduced beam section connections

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