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At hinge in a beam 

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WBMSC Sub-Assistant Engineer (Civil) 05 Jun 2022 Official Paper
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  1. BM is zero 
  2. BM is maximum 
  3. SF is zero
  4. None of these

Answer (Detailed Solution Below)

Option 1 : BM is zero 
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Detailed Solution

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Concept:

The moment at internal hinge and hinge roller supports is zero

This is because hinges, internal hinges and roller supports have only two reaction i.e. vertical and horizontal reactions. Hence, they cannot transfer moment due to which the structure has zero strains due to bending stress at hinge locations.

Below are the figures which show force analysis of different cases having zero bending moment:

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More Shear Force and Bending Moment Questions

Q1.A simply supported beam with a span length of 5 m carries a moment of 20 N-m (counterclockwise direction) at the middle of the beam. What will the value of reactions be at both the ends of the beam?
Q2.What will be the shape of the bending moment diagram for a cantilever beam carrying a uniformly distributed load throughout its length?
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Q4.A simply supported beam with a span length of 4 m carries a uniform load of intensity 5 N/m throughout its length. What will the value of the maximum bending moment (in N - m) in the beam be?
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Q6.Which type of support allows only rotational movement but resists both horizontal and vertical forces?
Q7.A simply supported beam of 8 m has two vertical point loads: 10 kN at 2 m from the left support, 10 kN at 6 m from the left support. Using the graphical method, what is the approximate reaction at the left support (RA)? 
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Q9.A simply supported beam of span '5 m' has a moment '100 kN-m' acting at mid span. The reaction at each support is:
Q10.Assume AB = BC= 1 m for the following beam : What will be the vertical reaction at point B?
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Q6.What will be the shape of the bending moment diagram for a cantilever beam carrying a uniformly distributed load throughout its length?
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Q8.If elastic strength increases 3 times, then Proof Resilience:
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Q10.For a thin planar ring of radius ‘r’ mm and thickness ‘t’ mm, its radius of gyration about the polar axis in mm is:
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