Civil Engineering Reference
In-Depth Information
418.5 mm
32
24.1
C
2
=
799.6
x
x
911.8 mm 847.8
19.4
C
1
= 175.45
32
Figure 4.137 The cross-section of cross girders (UB 914419343).
C
1
¼
175
:
45mm,
t
fl
¼
32,
C
1
=
t
fl
¼
175
:
45
=
32
¼
5
:
48
9
0
:
924
¼
8
:
316 Cross girder flange is class 1
ð
Þ
C
2
¼
799
:
6mm,
t
w
¼
19
:
4,
C
1
=
t
fl
¼
799
:
6
=
19
:
3
¼
41
:
2
72
0
:
924
¼
66
:
5 Cross girder web is class 1
ð
Þ
Check of Bending Resistance
W
pl
f
y
g
M0
¼
15,480
10
3
275
M
c
,
Rd
¼
¼
4,257,000,000Nmm
1
:
0
¼
4257 kNm
>
M
Ed
¼
3739
:
4 kNm Then O
ð
:
K
:
Þ
Check of Shear Resistance
A
v
f
y
=
p
=
p
ð
847
:
8
19
:
4
Þ
275
V
pl
,
Rd
¼
¼
¼
2,611,362
:
8N
g
M0
1
:
0
¼
2611
:
4kN
>
Q
Ed
¼
1325 kN Then O
ð
:
K
:
Þ
4.5.3 Design of the Main Plate Girders
Let us now design the main plate girders supporting the cross girders as
shown in
Figure 4.126
.
We can estimate the dead and live loads acting
on a main plate girder as follows:
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