BS EN 1993-1-1_2005

EN 1993-1-1: 2005 (E)

1,0

a0 a b c d

0,9 0,8 0,7

Reduction factor



1,1

0,6 0,5 0,4 0,3 0,2 0,1 0,0 0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

1,6

1,8

2,0

2,2

2,4

2,6

2,8

3,0

Non-dimensional slenderness

Figure 6.4: Buckling curves 6.3.1.3 (1)

Slenderness for flexural buckling

The non-dimensional slenderness

Af y

L cr 1 i 1

N cr A eff f y N cr

L cr i

A eff A

is given by:

for Class 1, 2 and 3 cross-sections

(6.50)

for Class 4 cross-sections

(6.51)

1

where Lcr is the buckling length in the buckling plane considered i

is the radius of gyration about the relevant axis, determined using the properties of the gross cross-section 1

E fy 235 fy

93,9 (fy in N/mm2)

NOTE B For elastic buckling of components of building structures see Annex BB. (2)

For flexural buckling the appropriate buckling curve should be determined from Table 6.2.

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