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Q: Which principle states that the influence line for a function (reaction, shear, moment) is to the same scale as the deflected shape of the beam when the beam is acted on by the function?
  • A. Maxwell
  • B. Von Mises
  • C. Rankine
  • D. Muller-Breslau
Correct Answer: Option D - As per Muller-Breslau principle, influence line for any stress function [Reaction, Shear, Moment] at any section may be obtained by removing the restraint in that direction and applying unit displacement in that direction. The deflected shape gives the ILD.
D. As per Muller-Breslau principle, influence line for any stress function [Reaction, Shear, Moment] at any section may be obtained by removing the restraint in that direction and applying unit displacement in that direction. The deflected shape gives the ILD.

Explanations:

As per Muller-Breslau principle, influence line for any stress function [Reaction, Shear, Moment] at any section may be obtained by removing the restraint in that direction and applying unit displacement in that direction. The deflected shape gives the ILD.