Performance of Link-To-Stub Bolted Connection in Column-Tree Moment Resisting Frames under Fire Conditions

Column-tree moment resisting frames, as the efficient shop-welded and field-bolted structural systems, are used in many countries. Very limited research has been carried out on such systems under fire conditions. This paper presents experimental investigations of the behavior of beam and bolted spli...

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Autores principales:	Mahmood Yahyai, Abbas Rezaeian
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2015
Materias:	experimental study steel beam bolted connection failure modes fire Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/4ba5f1342d4848bf8af8821663118df9
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spelling	oai:doaj.org-article:4ba5f1342d4848bf8af8821663118df92021-11-08T15:45:20ZPerformance of Link-To-Stub Bolted Connection in Column-Tree Moment Resisting Frames under Fire Conditions2476-39772538-2616https://doaj.org/article/4ba5f1342d4848bf8af8821663118df92015-12-01T00:00:00Zhttps://www.jsce.ir/article_38641_fb1b1fa48432aaea816252167124aab4.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Column-tree moment resisting frames, as the efficient shop-welded and field-bolted structural systems, are used in many countries. Very limited research has been carried out on such systems under fire conditions. This paper presents experimental investigations of the behavior of beam and bolted splice connections in steel column-tree moment resisting frames exposed to fire. Two full-scale steel sub-frames with different splice connections were tested under ISO 834 standard fire. The flange splice plates were configured as a single plate with single shear bolts in first specimen, and as double plates with double shear bolts in second specimen. The observation of thermal and structural fire behaviors including temperature histories, temperature-deflection of the beam, temperature-rotation of splice connections and failure modes were investigated. The temperature-deflection and temperature-rotation curves remained in the elastic range until about 600°C. Beyond 600°C, the behavior would be highly nonlinear plastic. The beam splice connection failed due to shear fracture of top bolts at temperatures beyond 750°C. Consequently, stub beam web failed at those temperatures because of block-shear. Using double plates with double shear bolts for flange splices would enhance the temperature resistance and rotational capacity of the beam splice connections. Both tests results confirmed that specimens retain the capacity to support the design load when the average beam temperature does not exceed 600°C. This temperature limit confirms the temperature criteria provided by ASTM E119 and ANSI/UL 263 for a restrained beam, and can be used to specify the minimum fire resistance criteria for beams in column-tree MRFs. The measured time-deflection curves showed that the restrained fire resistance rating for both unprotected specimens obtained about 15 minutes in both tests.Mahmood YahyaiAbbas RezaeianIranian Society of Structrual Engineering (ISSE)articleexperimental studysteel beambolted connectionfailure modesfireBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 2, Iss 3, Pp 23-33 (2015)
institution	DOAJ
collection	DOAJ
language	FA
topic	experimental study steel beam bolted connection failure modes fire Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	experimental study steel beam bolted connection failure modes fire Bridge engineering TG1-470 Building construction TH1-9745 Mahmood Yahyai Abbas Rezaeian Performance of Link-To-Stub Bolted Connection in Column-Tree Moment Resisting Frames under Fire Conditions
description	Column-tree moment resisting frames, as the efficient shop-welded and field-bolted structural systems, are used in many countries. Very limited research has been carried out on such systems under fire conditions. This paper presents experimental investigations of the behavior of beam and bolted splice connections in steel column-tree moment resisting frames exposed to fire. Two full-scale steel sub-frames with different splice connections were tested under ISO 834 standard fire. The flange splice plates were configured as a single plate with single shear bolts in first specimen, and as double plates with double shear bolts in second specimen. The observation of thermal and structural fire behaviors including temperature histories, temperature-deflection of the beam, temperature-rotation of splice connections and failure modes were investigated. The temperature-deflection and temperature-rotation curves remained in the elastic range until about 600°C. Beyond 600°C, the behavior would be highly nonlinear plastic. The beam splice connection failed due to shear fracture of top bolts at temperatures beyond 750°C. Consequently, stub beam web failed at those temperatures because of block-shear. Using double plates with double shear bolts for flange splices would enhance the temperature resistance and rotational capacity of the beam splice connections. Both tests results confirmed that specimens retain the capacity to support the design load when the average beam temperature does not exceed 600°C. This temperature limit confirms the temperature criteria provided by ASTM E119 and ANSI/UL 263 for a restrained beam, and can be used to specify the minimum fire resistance criteria for beams in column-tree MRFs. The measured time-deflection curves showed that the restrained fire resistance rating for both unprotected specimens obtained about 15 minutes in both tests.
format	article
author	Mahmood Yahyai Abbas Rezaeian
author_facet	Mahmood Yahyai Abbas Rezaeian
author_sort	Mahmood Yahyai
title	Performance of Link-To-Stub Bolted Connection in Column-Tree Moment Resisting Frames under Fire Conditions
title_short	Performance of Link-To-Stub Bolted Connection in Column-Tree Moment Resisting Frames under Fire Conditions
title_full	Performance of Link-To-Stub Bolted Connection in Column-Tree Moment Resisting Frames under Fire Conditions
title_fullStr	Performance of Link-To-Stub Bolted Connection in Column-Tree Moment Resisting Frames under Fire Conditions
title_full_unstemmed	Performance of Link-To-Stub Bolted Connection in Column-Tree Moment Resisting Frames under Fire Conditions
title_sort	performance of link-to-stub bolted connection in column-tree moment resisting frames under fire conditions
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2015
url	https://doaj.org/article/4ba5f1342d4848bf8af8821663118df9
work_keys_str_mv	AT mahmoodyahyai performanceoflinktostubboltedconnectionincolumntreemomentresistingframesunderfireconditions AT abbasrezaeian performanceoflinktostubboltedconnectionincolumntreemomentresistingframesunderfireconditions
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Performance of Link-To-Stub Bolted Connection in Column-Tree Moment Resisting Frames under Fire Conditions

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