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Standard VIII
Physics
Pressure
Influence lin...
Question
Influence line diagram for force in a member of truss is shown in the figure below:
A dead load of truss is 10 kN/m and live load is 5 kN/m, live load is longer than span. Maximum tensile force in the member is _________ kN.
15
Open in App
Solution
The correct option is
A
15
T
e
n
s
i
l
e
f
o
r
c
e
d
u
e
t
o
D
L
=
10
×
[
1
2
×
1
×
4
−
1
2
×
0.5
×
6
]
=
5
k
N
To obtain maximum tensile force, live load should be placed over the tension part only.
M
a
x
i
m
u
m
t
e
n
s
i
l
e
d
u
e
t
o
L
L
=
(
1
2
×
4
×
1
)
×
5
=
10
k
N
∴
Maximum tensile force = 5 + 10 = 15 kN.
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