Civil Engineering Reference
In-Depth Information
4.2.7.1 Load Bearing Stiffeners
To design the load bearing stiffener at supports (see
Figure 4.22
), we can also
follow the design rules specified in EC3 [1.27, 2.11] for concentrically
loaded compression members. The axial force in the stiffener is the maxi-
mum reaction at supports (
N
Ed
¼R
D+L+
F
), which is equal to 3327.2 kN.
The design procedures can be performed as follows:
N
Ed
N
b
,
Rd
1
:
0
wAf
y
g
M1
A¼
2
25
2
where,
N
b
,
Rd
¼
24 cm
2
:
4+46
:
4
1
:
6
¼
194
:
1
F
+
w¼
p
but
w
1
:
0
l
2
F
2
h
i
+
l
2
F¼
0
:
51+
a l
0
:
2
s
Af
y
N
cr
l¼
p
2
14
2
6
10
4
EI
L
2
3
:
210,000
27,492
:
N
cr
¼
¼
¼
63,248,742N
3000
2
r
194
:
24
100
275
63,248,742
l¼
¼
0
:
29
¼
0
29
2
F¼
0
:
51+0
:
49 0
ð
:
29
0
:
2
Þ
+0
:
:
564
25 cm
2.4
x
x
1.6
25 cm
22
22
2.4
Figure 4.22 Load bearing web stiffeners at supports.
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