Evaluation of Flexible Steel Frame Structures with Post Tensioned Cables to Sequences Far From Fault

Different solutions have been proposed by researchers in order to prevent the breakdown in welded connections between beam flange and column web, using moment connections. The use of post tensioned connections is one of the proposed solutions to reduce the damage in steel moment frame connections. T...

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Autores principales:	Mehran Akhavan Salmassi, Mohsen Gerami, Amirmahdi Heidari Tafreshi
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	post tension connections self-sufficiency steel bending frame far fault incremental non-linear dynamic analysis Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/8884d4306fb54397bf16c72afb13cfe7
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spelling	oai:doaj.org-article:8884d4306fb54397bf16c72afb13cfe72021-11-08T15:52:51ZEvaluation of Flexible Steel Frame Structures with Post Tensioned Cables to Sequences Far From Fault2476-39772538-261610.22065/jsce.2018.101782.1350https://doaj.org/article/8884d4306fb54397bf16c72afb13cfe72019-11-01T00:00:00Zhttps://www.jsce.ir/article_61447_e16a5644eef963490bf12c1456414ad3.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Different solutions have been proposed by researchers in order to prevent the breakdown in welded connections between beam flange and column web, using moment connections. The use of post tensioned connections is one of the proposed solutions to reduce the damage in steel moment frame connections. The connection is used for high-resistant steel cables, which are in parallel with the beam flange and pass through the column and are anchored in the outer side of the column flange. The post tensioned force of steel cables causes the beam flange to be compressed against the column flange, which results in a connection resistance moment against the exploited loads. The resistance moment creates a restoring force that maintains the self-centering behavior of the frame. On the other hand, sequential earthquakes can cause damage to the steel structures, which has been investigated by some researchers. Residual relative displacement of the floors caused by the initial vibration of the structures, increases the vulnerability of the structure to the future earthquakes. Therefore, the reduction of this parameter improves the behavior of the structure against seismic sequence. In this study, the performance of five-, eight- and twelve-story frames has been evaluated in two cases of flexural rigid welded-connections and post tensioned connections under the influence of sequential records away from the fault. The results show that the maximum residual relative displacements of floors in the frames with post tensioned connection were reduced by about forty percent compared to frames with simple moment connections. Due to the decrease in the residual relative displacement of the floors in the said structures, the use of a post tensioned connection has led to the improvement of seismic behavior in comparison with moment frames with rigid welded connections against seismic sequence.Mehran Akhavan SalmassiMohsen GeramiAmirmahdi Heidari TafreshiIranian Society of Structrual Engineering (ISSE)articlepost tension connectionsself-sufficiencysteel bending framefar faultincremental non-linear dynamic analysisBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss شماره ویژه 3, Pp 221-234 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	post tension connections self-sufficiency steel bending frame far fault incremental non-linear dynamic analysis Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	post tension connections self-sufficiency steel bending frame far fault incremental non-linear dynamic analysis Bridge engineering TG1-470 Building construction TH1-9745 Mehran Akhavan Salmassi Mohsen Gerami Amirmahdi Heidari Tafreshi Evaluation of Flexible Steel Frame Structures with Post Tensioned Cables to Sequences Far From Fault
description	Different solutions have been proposed by researchers in order to prevent the breakdown in welded connections between beam flange and column web, using moment connections. The use of post tensioned connections is one of the proposed solutions to reduce the damage in steel moment frame connections. The connection is used for high-resistant steel cables, which are in parallel with the beam flange and pass through the column and are anchored in the outer side of the column flange. The post tensioned force of steel cables causes the beam flange to be compressed against the column flange, which results in a connection resistance moment against the exploited loads. The resistance moment creates a restoring force that maintains the self-centering behavior of the frame. On the other hand, sequential earthquakes can cause damage to the steel structures, which has been investigated by some researchers. Residual relative displacement of the floors caused by the initial vibration of the structures, increases the vulnerability of the structure to the future earthquakes. Therefore, the reduction of this parameter improves the behavior of the structure against seismic sequence. In this study, the performance of five-, eight- and twelve-story frames has been evaluated in two cases of flexural rigid welded-connections and post tensioned connections under the influence of sequential records away from the fault. The results show that the maximum residual relative displacements of floors in the frames with post tensioned connection were reduced by about forty percent compared to frames with simple moment connections. Due to the decrease in the residual relative displacement of the floors in the said structures, the use of a post tensioned connection has led to the improvement of seismic behavior in comparison with moment frames with rigid welded connections against seismic sequence.
format	article
author	Mehran Akhavan Salmassi Mohsen Gerami Amirmahdi Heidari Tafreshi
author_facet	Mehran Akhavan Salmassi Mohsen Gerami Amirmahdi Heidari Tafreshi
author_sort	Mehran Akhavan Salmassi
title	Evaluation of Flexible Steel Frame Structures with Post Tensioned Cables to Sequences Far From Fault
title_short	Evaluation of Flexible Steel Frame Structures with Post Tensioned Cables to Sequences Far From Fault
title_full	Evaluation of Flexible Steel Frame Structures with Post Tensioned Cables to Sequences Far From Fault
title_fullStr	Evaluation of Flexible Steel Frame Structures with Post Tensioned Cables to Sequences Far From Fault
title_full_unstemmed	Evaluation of Flexible Steel Frame Structures with Post Tensioned Cables to Sequences Far From Fault
title_sort	evaluation of flexible steel frame structures with post tensioned cables to sequences far from fault
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/8884d4306fb54397bf16c72afb13cfe7
work_keys_str_mv	AT mehranakhavansalmassi evaluationofflexiblesteelframestructureswithposttensionedcablestosequencesfarfromfault AT mohsengerami evaluationofflexiblesteelframestructureswithposttensionedcablestosequencesfarfromfault AT amirmahdiheidaritafreshi evaluationofflexiblesteelframestructureswithposttensionedcablestosequencesfarfromfault
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Evaluation of Flexible Steel Frame Structures with Post Tensioned Cables to Sequences Far From Fault

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