Civil Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 1 (Q.No. 9)
9.
The shape of the bending moment diagram over the length of a beam, having no external load, is always
Discussion:
36 comments Page 4 of 4.
Samir said:
5 years ago
In some portion, self wg of member is not considered in calculation so given answer is right.
Sneha said:
5 years ago
Here it is asking for BMD and it will not consider self-weight while drawing. So, here BMD will be a straight horizontal line. And in that sense, it is taken as linear.
Uzair ahmed said:
5 years ago
No, the external load doesn't mean that beam is resting with weightlessness and levitating in the air, indeed, the dead load will be considered as UDL, and for UDL BMD is definitely parabola.
(1)
Gul panra said:
4 years ago
In case of structural analysis we ignore the self weight of beam only analysis on external load. While in designing of beam we take the self weight.
(2)
Navin said:
3 years ago
dM/dX = F.
dF/dX = w =0, shear variation is rectangle shape x^0.
So, BMD Varn is linear.
dF/dX = w =0, shear variation is rectangle shape x^0.
So, BMD Varn is linear.
(1)
Sivanarayana said:
1 year ago
The answer is parabola, why because in any beam i.e. SS beam, the cantilever beam self-weight of the beam is UDL only.
In that case, BMD is parabola. Note that in any design calculations, we are taking dead weight into account for calculations in fixing size steel calculations and other parameters.
In that case, BMD is parabola. Note that in any design calculations, we are taking dead weight into account for calculations in fixing size steel calculations and other parameters.
(1)
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