Civil Engineering Reference
In-Depth Information
6000
S
U
1
U
2
U
3
U
4
U
5
7500
V
4
V
5
V
1
V
2
V
3
V
6
L
2
L
3
L
4
L
5
L
1
10 × 6000 = 60000
S
Elevation
7500 mm
150
200
2000
2000
2000
2000
2000
1000
2000
1000 1000
1000
12,000 mm
Figure 4.36 General layout of a through truss highway steel bridge (the second design
example).
represents the static and dynamic effects of vertical loading due to normal
road traffic as specified in EC1 [3.1]. The bolts used in connections and
field splices are M27 high-strength pretensioned bolts. The unit weight
of reinforced concrete slab decks used is 25 kN/m
3
.
4.3.1 Design of the Stringers (Longitudinal Floor Beams)
Let us start by designing the stringers, the longitudinal steel beams, support-
ing the reinforced concrete slab deck as shown in
Figure 4.36
.
Dead Loads
The general layout of an intermediate stringer is shown in
Figure 4.38
.
The
dead loads acting on an intermediate stringer can be calculated as follows:
Flooring 1
:
75 kN
=
m
2
¼
1
:
75
2
¼
3
:
5kN
=
m
Reinforced concrete slab deck 0
ð
:
2m thickness
Þ ¼
5
2
¼
10 kN
=
m
Search WWH ::
Custom Search