Axially and transversely loaded Timoshenko and laced built-up columns with arbitrary supports

Gantes, CJ; Kalochairetis, KE

dc.contributor.author	Gantes, CJ	en
dc.contributor.author	Kalochairetis, KE	en
dc.date.accessioned	2014-03-01T02:07:52Z
dc.date.available	2014-03-01T02:07:52Z
dc.date.issued	2012	en
dc.identifier.issn	0143974X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29621
dc.subject	Geometrically and materially nonlinear imperfection analysis	en
dc.subject	Laced built-up columns	en
dc.subject	Second-order analysis	en
dc.subject	Shear deformation	en
dc.subject	Timoshenko columns	en
dc.subject.other	Analytical procedure	en
dc.subject.other	Analytical results	en
dc.subject.other	Arbitrary supports	en
dc.subject.other	Collapse loads	en
dc.subject.other	End conditions	en
dc.subject.other	External loading	en
dc.subject.other	Geometrically and materially nonlinear imperfection analysis	en
dc.subject.other	Geometrically nonlinear	en
dc.subject.other	Initial imperfection	en
dc.subject.other	Interaction equations	en
dc.subject.other	Lateral loading	en
dc.subject.other	Local buckling	en
dc.subject.other	Main effect	en
dc.subject.other	Second order analysis	en
dc.subject.other	Shear deformable beams	en
dc.subject.other	Shear rigidity	en
dc.subject.other	Shell element	en
dc.subject.other	Simply supported	en
dc.subject.other	Bending moments	en
dc.subject.other	Nonlinear analysis	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Shear deformation	en
dc.subject.other	Shear flow	en
dc.subject.other	Loading	en
dc.title	Axially and transversely loaded Timoshenko and laced built-up columns with arbitrary supports	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jcsr.2012.05.004	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jcsr.2012.05.004	en
heal.publicationDate	2012	en
heal.abstract	The two main effects that should be taken into account in the design of built-up columns are the shearing effect due to their reduced shear rigidity and the interaction between global and local buckling modes in the presence of imperfections. EC3 considers such columns as Timoshenko members for accounting for shear deformation and provides guidance for the calculation of their collapse load under axial compression only for the simply supported case. In the present work an approximate analytical procedure for the calculation of the maximum 2nd order bending moment along imperfect Timoshenko members with arbitrary rotational and translational boundary conditions under combined axial and lateral external loading is formulated. The procedure is verified by means of geometrically nonlinear numerical analyses with the use of shear deformable beam elements. This method is then used for the evaluation of the maximum actions due to combined axial and lateral loading along laced built-up columns with various end conditions accounting also for initial imperfections. Incorporating the 2nd order bending moments in an interaction equation specifically formulated for laced built-up columns, the collapse load is calculated. Analytically obtained results based on the proposed method are compared with the ones found from geometrically and materially nonlinear imperfection analyses (GMNIA) of laced built-up columns modeled using either beam or shell elements. The accuracy of the analytical results is found to be very satisfactory. Due to its simplicity and accuracy the proposed method is a useful tool for the design of laced built-up columns in structural engineering practice. © 2012 Elsevier Ltd. All rights reserved.	en
heal.journalName	Journal of Constructional Steel Research	en
dc.identifier.doi	10.1016/j.jcsr.2012.05.004	en
dc.identifier.volume	77	en
dc.identifier.spage	95	en
dc.identifier.epage	106	en