In structural analysis, Clapeyron's Theorem of Three Moments is primarily used to:

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  1. analyse the shear forces in a cantilever beam
  2. calculate the bending moments at the supports of a continuous beam
  3.  determine the deflection at the midpoint of a simply supported beam 
  4. evaluate the torsional stresses in circular shaft

Answer (Detailed Solution Below)

Option 2 : calculate the bending moments at the supports of a continuous beam
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Explanation:

  • Clapeyron's Theorem of Three Moments is a method used in structural analysis to calculate the bending moments at the supports of a continuous beam.
  • It is a fundamental tool in analyzing statically indeterminate structures, specifically for continuous beams with multiple spans.

 Additional InformationClapeyron's Theorem of Three Moments

  • Purpose:

    • It is a method used to calculate the bending moments at the supports of a continuous beam.

    • Helps in analyzing statically indeterminate structures.

  • Conditions:

    • Applicable to continuous beams (i.e., beams with more than two supports).

    • Requires knowledge of the beam's span lengths, external loads, and reactions.

  • Theorem Statement:

    • The theorem relates the bending moments at three consecutive supports of a continuous beam and provides an equation for each of the internal moments.

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