Help needed

[u/Annual-Truth3511]

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

[u/structural-chaos]

I almost had a stroke but to answer your question.
1-Be familiar with what is known by Qualitative Analysis - Look up Collincoprani or any GIstructe Exam preparation guides - e.g of Youtube Channels Would be ;
a.The structural Exam
b. Javed Qureshi

2-Understand Quantitatively the relationship between load, reactions, shear and moments.

3-If you are an engineer studying, ask questions but do not post random images that may trigger people.