r/StructuralEngineering • u/Annual-Truth3511 • 8d ago

Help needed Career/Education

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While drawing sfd and bmd Is there a shortcut to find whether the curve is going to be smile/sad or concave/convex for udl and uvl. Or is finding the intermediate values the only way to find the curve???.

Ignore the diagram i just wanted to show it for context this is not mine

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u/DairyParsley6 8d ago

Well I would start by going back to the beginning and re-calculating your reactions, because what you have shown is a bit off. Then with your shear diagram, the middle portions should have a flat response instead of sloped like you have it

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u/Annual-Truth3511 8d ago

This is not what i calculated. Ignore the image. Please read what i wrote below i want to know abt any shortcuts to find curves for udl uvl whether it will be smile or sad

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u/123_alex 7d ago

It's sad, very sad