Method of Virtual Work for Beams Example 1 (Part 2/2) - Structural Analysis

[@sheagrimsdale4443]

You will be the reason I pass my structural analysis exams. Thank you

[@helenvlogss]

Thank you so much. I was stuck with this principal with my lecturer's explanation and now I got this. You explained this a thousand times better than my lecturer. :)

[@caferemirylmaz1160]

YOU ARE THE BEST!!!!

[@oliviahunt3361]

I love these videos!!!! I even watch them when I'm finished with the class for entertainment purposes.

[@cyrusbobby4644]

These videos are helpful to me. Thanks for the hard work.

[@SarlCaganGuy]

Your videos are excellent I can't stop watching them!

[@structurefree]

can't stop, won't stop.

[@rhysv1rhys]

structurefree never intend to

[@g2k25d94]

These videos give me a home.

[@zaiyuanlu8751]

Very useful video! You can explain difficult things quite simply

[@connorfogue6905]

Great video! Where can I find the integral product table you mentioned?

[@structurefree]

Do a Google search on "product integral tables".

[@01110110]

Real good videos, why did not they are in Khan Academy?

[@prakashsharma1849]

thank you it helped me a lot.. i am big fan of your videos of som and sa

[@catherinengao4001]

always a big help!

[@enverniyazi4804]

that was great, thank you !

[@TheLeykis101]

Awesome, thanks for the help. ;)

[@AdelObaid]

that was helpful , thanks

[@markjames4068]

Bro! Test on this coming up! Thank you!

[@rupakulavenkatashiva3649]

Tremendous videos.... :)

[@aladinabrash7465]

Awesome But why you did not include the internal virtual wok of shear although you already draw the shear diagram

[@RYRYSULLY]

Is there a way to still use the formula with the moment diagrams area when you have a situation with different L values between the 2 diagrams for the real and virtual beams?

[@tiffanyagyarko6295]

why did you apply a unit couple instead of a unit load for your virtual moment diagram

[@NguyenMicheal]

you are a saint

[@structurefree]

👼

[@zhiwang6885]

I don not know why V(3m)=-90/EI kNm3? in time(8:36)

[@darkguy300]

+Zhi Wang i think it is because the deformation is down, not up. The signal its just to information

[@sabiansmasher2000]

I am confused I understand how you have internal moment at the top in compression and the bottom in tension, however at the origin (o point) you initial moment is constant which is Ma and you said your coordinate system is positive CCW. Why would Mo be negative then?

[@SamI-yq8oc]

I know this is super old, but in case anyone else sees it - it's just the convention that shear moment diagrams follow. It's counter-intuitive, but you just gotta learn to roll with it en.wikipedia.org/wiki/Shear_and_moment_diagram#Normal_convention

[@noufalmamari5069]

are you using American system ? I'm going to take my structural mechanics exam in uk so I'm supposed to do it following uk system, is this going to make any difference? and thank you so much for your helpful videos

[@structurefree]

i teach in the united states so i use both systems. the theory is the same, the process is the same, only the units are different.

[@Randomkloud]

Virtual work for truss joint displacement would be nice

[@engcmatseg-r7y]

Youre amazing dude, can you say where i can find the book of Ghali and Neville? Keep Going!!

[@structurefree]

Cesar Matheus Thank you for the kind words. Man, I don't know if Ghali and Neville is still available in print. I wouldn't use that book unless you are Ph.D. student looking for a refresher or all-in-one theory book.

[@rajatparikh5941]

This is pdf of the book...go on say thanks ftp://ns.lanamme.ucr.ac.cr/estructural/IC-0911/Bibliography/GhaliNevilleBrown%20Structural%20Analysis%20A%20Unified%20Classical%20and%20Matrix%20Approach%206thEdition%202009.pdf

[@gouravchakraborty1415]

Thank you.

[@a.msayem1663]

structure free in the house!!!

[@andromeda45]

we say: 1*deflection= integral of m*M/EI dx but..also m*M/EI dx is equal to slope.so how is this formula derived? we found slope 45, but if we integarte again its 90/EI..so two formulas are true ..but how? am confused..

[@gouravchakraborty1415]

In the first case, unit moment is considered, which is uniform, hence, the result is 45....but in the second case(deflection) unit force is applied,( variable moment)...hence result is diiferent (90)

[@tobeynguyen2613]

What does he mean the real moment (M/EI) is a "curvature"?

[@cyrusbobby4644]

These videos are helpful to me. Thanks for the hard work.