Effective length of columns with different end conditions
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- Опубліковано 7 лют 2025
- This mechanics of materials tutorial discusses the effective length of columns with different end conditions.
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Thanks for watching, I hope it helps!
This is a really good channel, and I really needed this right now, because I had no idea why the lengths were changing if they're all the same column anyways. I got it now, and it's thanks to you. Keep up the good work.
Glad I could help!! It sounds like you already. know, but all of the column videos are #50-56 here: engineer4free.com/mechanics-of-materials =)
I was searching so many sources and finally found this perfect one, i have an exam in 2 days and needed it alot, thank you.
Amazing! Good luck, and if you haven't already, check out engineer4free.com/mechanics-of-materials for the rest of the vids 👌👌
@@Engineer4Free thank you a lot, appreciate it
I've been watching your videos for 1 week now, they are really helpfull and well-explained so I want to thank you for that! I subscribed and liked your videos to support you and good luck with the next ones!
Thanks a lot! Glad to hear that your liking them :) :)
Good explaination with simple concept application.. Helped me a lot to understand as a student 👍
Awesome, glad I can help Ronak =)
Great simple and direct explanation!! Thank you:)
Thanks a lot for watching and taking the time to leave a comment!! :)
How effective length doubles in case of one free ? If this is all empirical why don't we directly remember values ?
Why did the deflection continued beyond fix support in "Free-Fix" case?
It is just modelled empirically that Le=2L in this case. You could also ask why the effective length is less than L in the other cases.
How do you treat a fixed-roller situation?
Depends how the roller is oriented, but if it is like a roller between the top of the column and a ceiling above it, then because that reaction cant provide any lateral support, it would be modelled as a fix-free type.
Which one is unsupported length?
It would be the quantity L in all cases. The distance between supports.
my brain can't comprehend why Le=2L for one free end
under any condition , could free end r,f concrete coulmn sway , moves right and left barely , but i saw it !!! was weird ! no slab yet but while guys works on wood form of slab i saw it and im 90% sure its not just eye/brain trick ,, i need to know please
when we are finding crippling load,should we take the actual length or effective length?
Always use effective length in the formula. Length = effective length only for pin-pin connections, but even then, you should identify somewhere on the page that L=Le and then use Le in the expression!
Engineer4Free thanks for the advice
and please do more videos
If braced at middle of column?
Here’s an example with bracing: www.engineer4free.com/4/column-buckling-example-problem-5-with-bracing depending on the setup, you may need to consider the column on each side to have different end conditions and effective lengths
@@Engineer4Free thank you
Second formula is wrong... You should consider Area Moment of Inertia also