Effect of low cycle fatigue on steel moment frames with prequalified rigid connections (bolted unstiffened and stiffened extended end-plate moment connections)

The moment beam-to-column connections include those connections that can transfer the moment between the beam and the column. Bolted unstiffened and stiffened extended end-plate moment connections are from this category. This type of connection, which was investigated after severe damage to connecti...

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Autores principales:	Mohsen Gerami, Amirhosein Zarei, Mohsen Ghaderi
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	end plate connection moment connection low cycle fatigue cumulative fatigue steel frame earthquake Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/f377e72700ad4f2a90661156fb163a92
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spelling	oai:doaj.org-article:f377e72700ad4f2a90661156fb163a922021-11-08T15:52:50ZEffect of low cycle fatigue on steel moment frames with prequalified rigid connections (bolted unstiffened and stiffened extended end-plate moment connections)2476-39772538-261610.22065/jsce.2018.98736.1327https://doaj.org/article/f377e72700ad4f2a90661156fb163a922019-11-01T00:00:00Zhttps://www.jsce.ir/article_61068_5b64f2d4a51e93a0b0269fb3f6fbeacf.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616The moment beam-to-column connections include those connections that can transfer the moment between the beam and the column. Bolted unstiffened and stiffened extended end-plate moment connections are from this category. This type of connection, which was investigated after severe damage to connections in the Northridge earthquake, Due to proper behavior under cyclic loading, was introduced as one of the pre-qualified connections of the AISC code and subsequently by the Iranian Code. Since low cyclic fatigue is another cause of failure in connections under the Northridge earthquake, it is necessary to study the fatigue behavior of this type of connection under the effect of low cycle fatigue. So far little studies have been done on the effect of low cycle fatigue on various types of connections, including end plate connections. In the present study, the S-N fatigue chart (Effective stress to the number of load cycles) that was used to estimate the effect of high cycle fatigue was developed to the low fatigue region for the end plate connections. Then, with using the S-N chart, the effect of low cycle fatigue on a 12-story structure under the influence of various earthquake records was studied to investigate the effect of low-cycle fatigue on structures with end plate moment connections. The analysis of steel structures showed that in end plate moment connections at the plastic hinge position, the effect of the cumulative cyclic fatigue before the plasticization of the connection under severe earthquakes is influential. Since the effects of fatigue are cumulative, it will be significant and destructive for end plate connections of buildings that have experienced several medium and large earthquakes.Mohsen GeramiAmirhosein ZareiMohsen GhaderiIranian Society of Structrual Engineering (ISSE)articleend plate connectionmoment connectionlow cycle fatiguecumulative fatiguesteel frameearthquakeBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss شماره ویژه 3, Pp 149-162 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	end plate connection moment connection low cycle fatigue cumulative fatigue steel frame earthquake Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	end plate connection moment connection low cycle fatigue cumulative fatigue steel frame earthquake Bridge engineering TG1-470 Building construction TH1-9745 Mohsen Gerami Amirhosein Zarei Mohsen Ghaderi Effect of low cycle fatigue on steel moment frames with prequalified rigid connections (bolted unstiffened and stiffened extended end-plate moment connections)
description	The moment beam-to-column connections include those connections that can transfer the moment between the beam and the column. Bolted unstiffened and stiffened extended end-plate moment connections are from this category. This type of connection, which was investigated after severe damage to connections in the Northridge earthquake, Due to proper behavior under cyclic loading, was introduced as one of the pre-qualified connections of the AISC code and subsequently by the Iranian Code. Since low cyclic fatigue is another cause of failure in connections under the Northridge earthquake, it is necessary to study the fatigue behavior of this type of connection under the effect of low cycle fatigue. So far little studies have been done on the effect of low cycle fatigue on various types of connections, including end plate connections. In the present study, the S-N fatigue chart (Effective stress to the number of load cycles) that was used to estimate the effect of high cycle fatigue was developed to the low fatigue region for the end plate connections. Then, with using the S-N chart, the effect of low cycle fatigue on a 12-story structure under the influence of various earthquake records was studied to investigate the effect of low-cycle fatigue on structures with end plate moment connections. The analysis of steel structures showed that in end plate moment connections at the plastic hinge position, the effect of the cumulative cyclic fatigue before the plasticization of the connection under severe earthquakes is influential. Since the effects of fatigue are cumulative, it will be significant and destructive for end plate connections of buildings that have experienced several medium and large earthquakes.
format	article
author	Mohsen Gerami Amirhosein Zarei Mohsen Ghaderi
author_facet	Mohsen Gerami Amirhosein Zarei Mohsen Ghaderi
author_sort	Mohsen Gerami
title	Effect of low cycle fatigue on steel moment frames with prequalified rigid connections (bolted unstiffened and stiffened extended end-plate moment connections)
title_short	Effect of low cycle fatigue on steel moment frames with prequalified rigid connections (bolted unstiffened and stiffened extended end-plate moment connections)
title_full	Effect of low cycle fatigue on steel moment frames with prequalified rigid connections (bolted unstiffened and stiffened extended end-plate moment connections)
title_fullStr	Effect of low cycle fatigue on steel moment frames with prequalified rigid connections (bolted unstiffened and stiffened extended end-plate moment connections)
title_full_unstemmed	Effect of low cycle fatigue on steel moment frames with prequalified rigid connections (bolted unstiffened and stiffened extended end-plate moment connections)
title_sort	effect of low cycle fatigue on steel moment frames with prequalified rigid connections (bolted unstiffened and stiffened extended end-plate moment connections)
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/f377e72700ad4f2a90661156fb163a92
work_keys_str_mv	AT mohsengerami effectoflowcyclefatigueonsteelmomentframeswithprequalifiedrigidconnectionsboltedunstiffenedandstiffenedextendedendplatemomentconnections AT amirhoseinzarei effectoflowcyclefatigueonsteelmomentframeswithprequalifiedrigidconnectionsboltedunstiffenedandstiffenedextendedendplatemomentconnections AT mohsenghaderi effectoflowcyclefatigueonsteelmomentframeswithprequalifiedrigidconnectionsboltedunstiffenedandstiffenedextendedendplatemomentconnections
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Effect of low cycle fatigue on steel moment frames with prequalified rigid connections (bolted unstiffened and stiffened extended end-plate moment connections)

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