The Moment of Resistance (MR) in a beam is defined as:

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  1. the internal moment developed due to bending stresses
  2. the product of shear force and bending moment
  3. the sum of shear forces in the beam
  4. the external moment applied to the beam

Answer (Detailed Solution Below)

Option 1 : the internal moment developed due to bending stresses
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Explanation:

  • Moment of Resistance (MR) is the internal resisting moment developed in a structural member (like a beam) due to bending stresses.

  • It is equal in magnitude and opposite in direction to the external bending moment at a section in equilibrium.

Additional Information

MR is the maximum internal bending moment a section of a beam or structural member can resist without failing.

It depends on:

  • Material strength (e.g., yield stress of steel, compressive strength of concrete)

  • Section properties (especially the section modulus, Z)

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