Civil Engineering Reference
In-Depth Information
1
F
+
w¼
p
but
w
1
:
0
l
2
F
2
h
i
+
l
2
51+
a l
0
F¼
0
:
:
2
¼
2
597
2
F¼
0
:
51+0
:
34 1
ð
:
597
0
:
2
Þ
+1
:
:
013
1
w¼
013 +
p
¼
0
:
309 but
w
1
:
0
013
2
597
2
2
:
2
:
1
:
0
:
309
86
:
4
100
275
1
Then,
N
b
,
Rd
¼
¼
667,440N
:
1
N
b
,
Rd
¼
667
:
4kN
>
N
Ed
¼
199
:
1 kN Then O
ð
:
K
:
Þ
4.5.10 Design of Stringer-Cross Girder Connection
The stringer is designed as a simply supported beam on cross girders; therefore,
the connection is mainly transferring shear forces (maximum reaction from
stringers of 567 kN) (see
Figure 4.155
). Using M27 high-strength preten-
sioned bolts of grade 8.8, having
f
ub
of 800 MPa, shear area
A
of 4.59 cm
2
,
and gross area
A
g
of 5.73 cm
2
, we can determine the required number of bolts,
following the rules specified in EC3 (BS EN 1993-1-8) [2.13], as follows:
a
V
f
ub
A
g
M2
F
v
,
Rd
¼
0
:
6
800
459
1
F
v
,
Rd
¼
¼
176,256N
:
25
Q
D+L+
f
= 567 kN
Q
D+L+
f
= 567 kN
N
1
N
2
Figure 4.155 The connection between stringer and cross girder.
Search WWH ::
Custom Search