Different cross‐section in lateral‐torsional buckling. (13th September 2017)

• Record Type: Journal Article
• Authors: Bajer, Miroslav; Barnat, Jan; Vild, Martin; Melcher, Jindřich; Karmazínová, Marcela; Piják, Jiri
• Is Part Of: Ce/papers. Volume 1:issue 2/3(2017)
• Page Start: 4704
• Page End: 4711
• Publication Date: 2017-09-13
• Subjects: Beam -- experiment -- lateral‐torsional buckling -- steel; Civil engineering -- Periodicals; 624
• DOI: 10.1002/cepa.532
• Languages: English
• ISSNs: 2509-7075

Abstract

ABSTRACT: The goal of the research presented in this paper is the experimental and theoretical analysis of cross‐section which can be asymmetric. Particularly, there are experimental tests of several beams of selected cross‐section shapes described and analysed. The main idea of those experiments was to observe the differences in behaviour between monosymmetric cross‐section and the asymmetric one. Currently used design methods for a solution of lateral‐torsional buckling are based on critical moment approach. This solution is also implemented in design codes but it is limited for use of double and monosymmetric cross‐sections. Another part of the paper is focused on the numerical evaluation of transversally loaded beam of one monosymmetric and four asymmetric cross‐section shapes susceptible to lateral‐torsional buckling. Several analytic methods used for evaluation of the beam bending resistance in design software were evaluated. This paper presents the comparison of numerical and experimental results of transversally loaded beams with monosymmetric and asymmetric cross‐sections. Stresses in selected parts of the cross‐section are evaluated and compared together. This comparison shows that the normal stress on both (monosymmetric and asymmetric) cross sections is the subject of the same rules – a combination of stresses inflicted by bending and torsion caused by an eccentricity between the point of load application and the centre of shear.