Investigation on using stiffness in Slotted web connection under cyclic load

A lot of moment resisting steel frames were damaged, after Northridge earthquake. In these building, the usual rigid weld connection didn’t work properly and fielded. In the rigid weld connections, available Shear force in the flanges and lateral torsional buckling are the main reason for weld fract...

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Autores principales:	Hamid Mirshekar, Seyed Roohollah Mousavi
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	slotted web connection stiffness ductility hysteresis loop energy absorbing Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/5f0c2b79693c4e668935138b760b1aa9
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spelling	oai:doaj.org-article:5f0c2b79693c4e668935138b760b1aa92021-11-08T15:52:50ZInvestigation on using stiffness in Slotted web connection under cyclic load2476-39772538-261610.22065/jsce.2018.108469.1392https://doaj.org/article/5f0c2b79693c4e668935138b760b1aa92019-11-01T00:00:00Zhttps://www.jsce.ir/article_60365_e0e035bbbe16fcf5a5723c245e807d06.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616A lot of moment resisting steel frames were damaged, after Northridge earthquake. In these building, the usual rigid weld connection didn’t work properly and fielded. In the rigid weld connections, available Shear force in the flanges and lateral torsional buckling are the main reason for weld fracture.Slotted web connections, by improving many weaknesses present in moment connections were introduced by Seismic Structural Design Associates (SSDA), and has been classified as a special moment connection in the American Institute of Steel Construction (AISC), managed to qualify for the Federal Emergency Management Agency (FEMA) regulations.The Slotted Web connection design rationale that sizes the beam slot length, shear plate, and connection weldments, is based upon successful FEMA/AISC ATC-24 protocol test results and extensive inelastic finite element analyses of the beam and column stress and strain distributions. Incorporated in this rationale, which has been accepted by numerous departments of building and safety, are the UBC and AISC Load and Resistance Factor Design (LRFD) Specifications and the 1997 AISC Seismic Design Provisions for Steel Buildings and its supplements. In this connection, the separation of beam flanges removes the shear force from beam flange and it causes to transfer it on beam web. This connection is using moment resisting steel frame structure with proper behaviour and good seismic performance One of disadvantage of this connection is fast buckling of beam flange, to revise this problem in Slotted web connection we add a couple of vertical stiffness up and down the beam flange. Using of these stiffness, not only prevent fast buckling but also increase ductility and seismic performance and when we use these stiffness we will see, the absorbing of energy in hysteric loop will be more than the usual Slotted web connection.Hamid MirshekarSeyed Roohollah MousaviIranian Society of Structrual Engineering (ISSE)articleslotted web connectionstiffnessductilityhysteresis loopenergy absorbingBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss شماره ویژه 3, Pp 95-106 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	slotted web connection stiffness ductility hysteresis loop energy absorbing Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	slotted web connection stiffness ductility hysteresis loop energy absorbing Bridge engineering TG1-470 Building construction TH1-9745 Hamid Mirshekar Seyed Roohollah Mousavi Investigation on using stiffness in Slotted web connection under cyclic load
description	A lot of moment resisting steel frames were damaged, after Northridge earthquake. In these building, the usual rigid weld connection didn’t work properly and fielded. In the rigid weld connections, available Shear force in the flanges and lateral torsional buckling are the main reason for weld fracture.Slotted web connections, by improving many weaknesses present in moment connections were introduced by Seismic Structural Design Associates (SSDA), and has been classified as a special moment connection in the American Institute of Steel Construction (AISC), managed to qualify for the Federal Emergency Management Agency (FEMA) regulations.The Slotted Web connection design rationale that sizes the beam slot length, shear plate, and connection weldments, is based upon successful FEMA/AISC ATC-24 protocol test results and extensive inelastic finite element analyses of the beam and column stress and strain distributions. Incorporated in this rationale, which has been accepted by numerous departments of building and safety, are the UBC and AISC Load and Resistance Factor Design (LRFD) Specifications and the 1997 AISC Seismic Design Provisions for Steel Buildings and its supplements. In this connection, the separation of beam flanges removes the shear force from beam flange and it causes to transfer it on beam web. This connection is using moment resisting steel frame structure with proper behaviour and good seismic performance One of disadvantage of this connection is fast buckling of beam flange, to revise this problem in Slotted web connection we add a couple of vertical stiffness up and down the beam flange. Using of these stiffness, not only prevent fast buckling but also increase ductility and seismic performance and when we use these stiffness we will see, the absorbing of energy in hysteric loop will be more than the usual Slotted web connection.
format	article
author	Hamid Mirshekar Seyed Roohollah Mousavi
author_facet	Hamid Mirshekar Seyed Roohollah Mousavi
author_sort	Hamid Mirshekar
title	Investigation on using stiffness in Slotted web connection under cyclic load
title_short	Investigation on using stiffness in Slotted web connection under cyclic load
title_full	Investigation on using stiffness in Slotted web connection under cyclic load
title_fullStr	Investigation on using stiffness in Slotted web connection under cyclic load
title_full_unstemmed	Investigation on using stiffness in Slotted web connection under cyclic load
title_sort	investigation on using stiffness in slotted web connection under cyclic load
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/5f0c2b79693c4e668935138b760b1aa9
work_keys_str_mv	AT hamidmirshekar investigationonusingstiffnessinslottedwebconnectionundercyclicload AT seyedroohollahmousavi investigationonusingstiffnessinslottedwebconnectionundercyclicload
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Investigation on using stiffness in Slotted web connection under cyclic load

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