Buckling Resistance Criteria of Prismatic Beams Under Biaxial Moment Gradient

Marian Giżejowski , Radosław Szczerba , Marcin Daniel Gajewski , Zbigniew Stachura

Abstract

Laterally and torsionally unrestrained steel I-section beams are susceptible to torsional deformations between supports; therefore, according to Part 1-1 of Eurocode 3, they need to be designed to resist lateral-torsional buckling. Eurocode’s steelwork design criteria require safety checking based on two stability interaction formulae utilizing the so-called equivalent uniform moment factors and the cross-section resistance formula that, in the case of moment gradient, refer to the beam end section. Uncoupling the beam stability resistance criterion and the cross-section resistance criterion may result in a nonuniform safety assessment of I-section beams. Finite element simulations of the beam resistance for different moment gradient ratios are performed. Verification of the buckling resistance is conducted by varying the following parameters: the slenderness ratio, the location of maximum end moments about both axes and the section depth-to-width ratio (i.e., considering rolled I- and H-sections). The variation in the accuracy of the current Eurocode resistance evaluation method is identified, and an approach for a better equalization of the safety predictions is suggested by considering different values of the most important factors influencing the stability performance of steel I-section beams.
Author Marian Giżejowski (FCE / ICE)
Marian Giżejowski,,
- The Institute of Civil Engineering
, Radosław Szczerba (FCE / ICE)
Radosław Szczerba,,
- The Institute of Civil Engineering
, Marcin Daniel Gajewski (FCE / ICE)
Marcin Daniel Gajewski,,
- The Institute of Civil Engineering
, Zbigniew Stachura (FCE / ICE)
Zbigniew Stachura,,
- The Institute of Civil Engineering
Journal seriesInternational Journal of Steel Structures, ISSN 1598-2351, (A 20 pkt)
Issue year2019
Vol19
No2
Pages559-576
Keywords in EnglishSteel I-section, Biaxial bending, Special mono-axial bending, Imperfect unrestrained beam, FEM nonlinear stability analysis, Resistance verification, Eurocodes
ASJC Classification2205 Civil and Structural Engineering
DOIDOI:10.1007/s13296-018-0143-6
URL https://doi.org/10.1007/s13296-018-0143-6
Languageen angielski
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Giżejowski2018_Article_BucklingResistanceCriteriaOfPr.pdf 3.83 MB
Score (nominal)20
ScoreMinisterial score = 20.0, 07-08-2019, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus Citations = 1; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.902; WoS Impact Factor: 2017 = 0.734 (2) - 2017=0.859 (5)
Citation count*1 (2019-08-08)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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