Nonlinear stability analysis of non-prismatic simple steel frames with flexible supports and semi-rigid connection

In this paper, various methods of linear and nonlinear stability analysis of simple steel frames are introduced. In the following, based on moderately large rotations and small strains, nonlinear stability analysis of a non-prismatic simple steel frame with semi-rigid connection and flexible support...

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Autores principales:	mohsen bambaeechee, ghasem Paseban
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2020
Materias:	nonlinear analysis stability simple steel frame i-shape non-prismatic column flexible support semi-rigid connection eccentric load Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/3c7a821e47c5472d93f4572575ab74e9
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spelling	oai:doaj.org-article:3c7a821e47c5472d93f4572575ab74e92021-11-08T15:54:03ZNonlinear stability analysis of non-prismatic simple steel frames with flexible supports and semi-rigid connection2476-39772538-261610.22065/jsce.2019.144522.1641https://doaj.org/article/3c7a821e47c5472d93f4572575ab74e92020-10-01T00:00:00Zhttps://www.jsce.ir/article_81769_362aac311a80b25f0255a1e76de62bc8.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616In this paper, various methods of linear and nonlinear stability analysis of simple steel frames are introduced. In the following, based on moderately large rotations and small strains, nonlinear stability analysis of a non-prismatic simple steel frame with semi-rigid connection and flexible supports is performed, which is subjected to a concentrated vertical load eccentrically at its joint. Accordingly, firstly, the accuracy and capability of suggested formulations will be verified by comparing with the results of other researchers. Then, the effects of eccentric axial load factor, shape factor of non-prismatic column, rotational stiffness of elastic support, translational stiffness of lateral support, rotational stiffness of beam-column connection and slenderness ratio of members on the pre-bucking and post-buckling behavior of a steel frame will be investigated. The results show each of these factors has a significant effect on the equilibrium path and buckling load of the structure. In other words, by increasing the slenderness ratio of members, shape factor and stiffness of connections, increases the nonlinear buckling load of the structure. Accordingly, the translational stiffness of lateral support and slenderness ratio of members have the maximum and minimum effect on this increase, respectively. Moreover, by utilizing the non-linear stability analysis, the buckling load of the simple steel frame reduces with respect to linear stability analysis.mohsen bambaeecheeghasem PasebanIranian Society of Structrual Engineering (ISSE)articlenonlinear analysisstabilitysimple steel framei-shape non-prismatic columnflexible supportsemi-rigid connectioneccentric loadBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 7, Iss شماره ویژه 3, Pp 239-258 (2020)
institution	DOAJ
collection	DOAJ
language	FA
topic	nonlinear analysis stability simple steel frame i-shape non-prismatic column flexible support semi-rigid connection eccentric load Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	nonlinear analysis stability simple steel frame i-shape non-prismatic column flexible support semi-rigid connection eccentric load Bridge engineering TG1-470 Building construction TH1-9745 mohsen bambaeechee ghasem Paseban Nonlinear stability analysis of non-prismatic simple steel frames with flexible supports and semi-rigid connection
description	In this paper, various methods of linear and nonlinear stability analysis of simple steel frames are introduced. In the following, based on moderately large rotations and small strains, nonlinear stability analysis of a non-prismatic simple steel frame with semi-rigid connection and flexible supports is performed, which is subjected to a concentrated vertical load eccentrically at its joint. Accordingly, firstly, the accuracy and capability of suggested formulations will be verified by comparing with the results of other researchers. Then, the effects of eccentric axial load factor, shape factor of non-prismatic column, rotational stiffness of elastic support, translational stiffness of lateral support, rotational stiffness of beam-column connection and slenderness ratio of members on the pre-bucking and post-buckling behavior of a steel frame will be investigated. The results show each of these factors has a significant effect on the equilibrium path and buckling load of the structure. In other words, by increasing the slenderness ratio of members, shape factor and stiffness of connections, increases the nonlinear buckling load of the structure. Accordingly, the translational stiffness of lateral support and slenderness ratio of members have the maximum and minimum effect on this increase, respectively. Moreover, by utilizing the non-linear stability analysis, the buckling load of the simple steel frame reduces with respect to linear stability analysis.
format	article
author	mohsen bambaeechee ghasem Paseban
author_facet	mohsen bambaeechee ghasem Paseban
author_sort	mohsen bambaeechee
title	Nonlinear stability analysis of non-prismatic simple steel frames with flexible supports and semi-rigid connection
title_short	Nonlinear stability analysis of non-prismatic simple steel frames with flexible supports and semi-rigid connection
title_full	Nonlinear stability analysis of non-prismatic simple steel frames with flexible supports and semi-rigid connection
title_fullStr	Nonlinear stability analysis of non-prismatic simple steel frames with flexible supports and semi-rigid connection
title_full_unstemmed	Nonlinear stability analysis of non-prismatic simple steel frames with flexible supports and semi-rigid connection
title_sort	nonlinear stability analysis of non-prismatic simple steel frames with flexible supports and semi-rigid connection
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2020
url	https://doaj.org/article/3c7a821e47c5472d93f4572575ab74e9
work_keys_str_mv	AT mohsenbambaeechee nonlinearstabilityanalysisofnonprismaticsimplesteelframeswithflexiblesupportsandsemirigidconnection AT ghasempaseban nonlinearstabilityanalysisofnonprismaticsimplesteelframeswithflexiblesupportsandsemirigidconnection
_version_	1718441559720984576

Nonlinear stability analysis of non-prismatic simple steel frames with flexible supports and semi-rigid connection

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