The Muller-Breslau principle states that the influence line diagram (ILD) for any stress resultant is:
Choose the correct answer
The bending moment diagram under unit load
The deflected shape when a unit displacement is applied at the released constraint
The shear force diagram under moving unit load
The elastic curve under distributed load
Correct Answer
B. The deflected shape when a unit displacement is applied at the released constraint
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Muller-Breslau principle: ILD for a reaction/moment/shear at a section equals the deflected shape of the released (primary) structure when a unit corresponding displacement/rotation is introduced at that point.
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