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Axial, Shear, and Moment Diagrams in Frames - Intro to Structural Analysis
This video presents a detailed example problem of computing and drawing the axial, shear, and moment diagrams in structures with multiple elements coming together: in this case, frames.
In this example, we will:
1) Compute the reactions forces
2) Define the coordinate systems for each column or beam
3) Draw the internal force diagrams for each element
4) Summarize the results by superposing the diagrams on the structure
Special attention should always be given to the sign convention and coordinate system for each element. Designing for a compressive versus tensile axial force are very different things, and when designing for bending moment, we need to know which part of the section is in tension versus compression. Fortunately for shear, the sign convention is not as important in design, though it is important for correctly deriving the moment diagram.
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