Civil Engineering Reference
In-Depth Information
Road finishing
2 m
R.C. haunched
slab deck
An intermediate
stringer
Figure 4.164 General layout of a an intermediate stringer.
g
vk
= 15.5 kN/m
5 m
38.75 kN
+
S.F.D.
-
38.75 kN
B.M.D.
+
48.44 kN.m
Figure 4.165 Straining actions from dead loads acting on an intermediate stringer.
Total dead load
¼ g
vk
¼
15
:
=
m
Assuming the stringers are simply supported by the cross girders, we can
calculate the maximum shear force and bending moment due to dead loads
on an intermediate stringer (see
Figure 4.165
)
as follows:
5kN
Q
D
:
L
:
¼ g
vk
L
=
2
¼
15
:
5
5
=
2
¼
38
:
75 kN
M
D
:
L
:
¼ g
vk
L
2
5
5
2
=
8
¼
15
:
=
8
¼
48
:
44 kNm
Live Loads
The live loads acting on the highway bridge conform to LoadModel 1, which
represents the static and dynamic effects of vertical loading due to normal road
traffic as specified in EC1 [3.1]. To determine the worst cases of loading on an
intermediate stringer due to live loads, we can study a lateral section through
vehicles and a lateral section through distributed loads of Load Model 1 acting
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