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Bending Strength of Beams - Laterally Supported Beams
The propertie...
Question
The properties of the section of a laterally simply supported beam is shown in figure:
The section is plastic. Design bending strength (in kN-m) of the beam is______.
f
y
=
250
M
P
a
155
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Solution
The correct option is
A
155
As the section is plastic and laterally simply supported.
M
d
=
β
b
z
p
f
y
γ
m
0
≤
1.2
z
e
f
y
γ
m
0
β
b
z
p
f
y
γ
m
0
=
1
×
750
×
10
3
×
250
1.1
=
170.45
k
N
−
m
1.2
z
e
f
y
γ
m
0
=
1.2
×
570
×
10
3
×
250
1.1
=
155.45
k
N
−
m
∴
Design bending strength
=
155.45
k
N
−
m
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0
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