Abstract This paper describes the assessment of the EN 1993-1-1 design rules for cross-section resistance to moment-normal force interaction ( M-N interaction). Besides the fact that the Eurocode design rules show unconservative predictions of the reduced plastic moment capacity for the presence of relatively low normal force, the recommended partial factor is γ M0 = 1.00 and relative large shear forces up to 50% of the shear resistance are allowed. This means that, neglecting a possible benefit from strain hardening, the EN 1993-1-1 design rules have no spare capacity available in the section. A few large scale experiments for M-N interaction were performed on HEA240 (S355JR) sections. In order to simulate the behaviour of a section to M-N interaction, a Finite Element Model was created in Abaqus/CAE. The model was validated against the experimental test results. Then, 1188 numerical test results were generated. A statistical evaluation to assess the design rule against these numerical test results showed that the recommended value γ M = 1.00 of the partial factor used in the EN1993-1-1 design rules is statistically acceptable for I-shaped sections in steel grades S235 and S355. For S460 it is necessary to use γ M = 1.10 based on the currently available statistical material data.
[1]
Lynn S. Beedle,et al.
The plastic behavior of structural members and frames, Welding Journal, 36 (6), p. 275-s (1957) , Reprint No. 115 (57-4)
,
1956
.
[2]
Andreas Taras,et al.
Contribution to the Development of Consistent Stability Design Rules for Steel Members
,
2010
.
[3]
Husain Abbas,et al.
Strain hardening in M–P interaction for metallic beam of I-section
,
2013
.
[4]
Fritz Lab.
Commentary on plastic design in steel, theoretical considerations experimental verification design guides Part 3A
,
1958
.
[5]
H. H. Snijder,et al.
Mechanical properties of roller bent wide flange sections - part 1: Experimental investigation
,
2012
.
[6]
David A. Nethercot,et al.
Statistical evaluation of the lateral–torsional buckling resistance of steel I-beams, Part 2: Variability of steel properties
,
2009
.
[7]
Theodore V. Galambos,et al.
Guide to stability design criteria for metal structures
,
1998
.