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A step in the bending moment diagram indicates then
- a)There is a concentrated load acting on the beam at that section
- b)There is a change in the intensity of uniformly distributed load on either side of the section
- c)There is a couple acting at that section
- d)No lead acts at that section
Correct answer is option 'C'. Can you explain this answer?
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A step in the bending moment diagram indicates thena) There is a con...
A step in the bending moment diagram indicates, there is a couple acting at that section. A step in the shear force diagram indicates there is a concentrated load at that section.
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A step in the bending moment diagram indicates thena) There is a con...
Explanation:
A bending moment diagram is a graphical representation of the variation of bending moment along the length of a beam. It shows the internal bending moment at different sections of the beam. The bending moment at a section is the algebraic sum of the moments about that section due to all the loads acting on the beam. A step in the bending moment diagram indicates a sudden change in the bending moment at that section. This can occur due to a couple acting on the beam.
Couple:
A couple is a pair of equal and opposite forces that act on a body but do not produce any translational motion. They only produce a rotational motion about the axis perpendicular to the plane of the couple. A couple produces a pure moment, which is a moment that has no associated force.
Effect on Bending Moment:
When a couple acts on a beam, it produces a bending moment that varies linearly along the length of the beam. The maximum bending moment occurs at the section where the couple is applied. The bending moment diagram for a couple is a rectangular hyperbola, which shows a sudden change in bending moment at the section where the couple is applied.
Conclusion:
Hence, option 'C' is the correct answer because a step in the bending moment diagram indicates that there is a couple acting at that section.
A bending moment diagram is a graphical representation of the variation of bending moment along the length of a beam. It shows the internal bending moment at different sections of the beam. The bending moment at a section is the algebraic sum of the moments about that section due to all the loads acting on the beam. A step in the bending moment diagram indicates a sudden change in the bending moment at that section. This can occur due to a couple acting on the beam.
Couple:
A couple is a pair of equal and opposite forces that act on a body but do not produce any translational motion. They only produce a rotational motion about the axis perpendicular to the plane of the couple. A couple produces a pure moment, which is a moment that has no associated force.
Effect on Bending Moment:
When a couple acts on a beam, it produces a bending moment that varies linearly along the length of the beam. The maximum bending moment occurs at the section where the couple is applied. The bending moment diagram for a couple is a rectangular hyperbola, which shows a sudden change in bending moment at the section where the couple is applied.
Conclusion:
Hence, option 'C' is the correct answer because a step in the bending moment diagram indicates that there is a couple acting at that section.
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A step in the bending moment diagram indicates thena) There is a concentrated load acting on the beam at that sectionb) There is a change in the intensity of uniformly distributed load on either side of the sectionc) There is a couple acting at that sectiond) No lead acts at that sectionCorrect answer is option 'C'. Can you explain this answer?
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