SA20: Work-Energy Principle (Part 2)

Summary

This lecture explores the work-energy principle in structural mechanics, focusing on calculating deflections in beams and frames under concentrated loads. The principle states that the external work done by applied loads equals the internal energy change in the structure. The process involves deriving formulas for internal energy based on bending moments and displacements, using integration to evaluate the total energy. Limitations of the principle are discussed, such as its inability to calculate displacements in complex multi-load scenarios. Despite these limitations, the principle serves as a foundation for more advanced energy methods in structural analysis.

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