Elastic limit state flexural-torsional postbuckling analysis of bars with open thin-walled cross-sections under axial thrust

Ioannidis, GI; Polyzois, DJ; Kounadis, AN

dc.contributor.author	Ioannidis, GI	en
dc.contributor.author	Polyzois, DJ	en
dc.contributor.author	Kounadis, AN	en
dc.date.accessioned	2014-03-01T01:15:35Z
dc.date.available	2014-03-01T01:15:35Z
dc.date.issued	2000	en
dc.identifier.issn	0141-0296	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13608
dc.subject	central compression	en
dc.subject	elastic bars	en
dc.subject	flexural-torsional buckling	en
dc.subject	open thin-walled asymmetric cross-sections	en
dc.subject.classification	Engineering, Civil	en
dc.title	Elastic limit state flexural-torsional postbuckling analysis of bars with open thin-walled cross-sections under axial thrust	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0141-0296(98)00091-1	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0141-0296(98)00091-1	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	This work deals with the elastic limit state flexural-torsional postbuckling analysis of simply supported bars with open thin-walled asymmetric cross-sections under axial thrust. As it is well known stocky bars with the above type of cross-sections always fail by flexural-torsional buckling in the case of asymmetric cross-sections (whose centroid does not coincide with the shear centre), while in the case of monosymmetric cross-sections the failure may occur either through flexural (Euler) buckling or flexural-torsional buckling depending on the geometric characteristics of the bars. In all the above three cases the critical state is associated with postbuckling strength. In this paper attention focuses on the first yielding occurring at the initial part of the post-critical path of flexural-torsional buckling. This is, in case of bars made from ideal elastic-ideal plastic material, associated with the maximum combined normal stress, due to axial compression, bending and warping, which, along with the nonlinear equilibrium equation, yield the maximum (ultimate) elastic load-carrying capacity. The elastic limit state postbuckling analysis given here is demonstrated with the aid of equal-leg angles commonly used in trusses. (C) 1999 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	ENGINEERING STRUCTURES	en
dc.identifier.doi	10.1016/S0141-0296(98)00091-1	en
dc.identifier.isi	ISI:000084607500007	en
dc.identifier.volume	22	en
dc.identifier.issue	5	en
dc.identifier.spage	472	en
dc.identifier.epage	479	en