Trusses - Method of Joints with Examples

In this video, the analysis of statically determinate trusses using the method of joints is explained. Examples are given to illustrate the method.
This is part of a civil engineering course about structural analysis of determinate structures.
The video explains the concept behind the method and shows how the method is applied.
Trusses can be also be analyzed using the method of Sections
Analysis of trusses using the method of sections is explained in the following video:
• Trusses - Method of Se...
To better understand this video, you should have knowledge of internal forces and support reactions.
For Information about internal forces refer to the lecture on Internal Forces:
• Internal Forces in Str...
For Information about support reactions refer to the following lectures about reactions:
• Support Reactions - Si...
• Support Reactions - Co...

[@drnafie-structuralengineer4620]

For Analysis of Trusses using the Method of Sections, Watch:
czcams.com/video/vQ36P9_J2_g/video.html

[@nadimibrahim1062]

Really helpful

[@faustoabad3387]

In the first Example, why does Ya = 10kn ? and Yb=12kn ?

[@drnafie-structuralengineer4620]

Ya and Yb are obtained using the equilibrium equations.
If you take the moment about point B, the equation will be as follows:
-Ya x 12 + 9 x 8 + 12 x 4 =0 this gives Ya = 10 KN,
then by taking the equilibrium of the vertical forces
Ya + Yb - 9 -12 =0 this will give Yb = 11 KN
For more information on how to find the reactions watch the following lectures:
Reactions- Simple Cases: czcams.com/video/eWuNPDYmfcc/video.html
Reactions - Advanced Cases: czcams.com/video/JHZJ7XK4JU0/video.html

[@matthieu453]

why is there a +10 while calculating Ffg?

[@drnafie-structuralengineer4620]

If you are referring to example 1, we find Ffg by balancing joint f in the X direction.
we have 3 forces int he X direction Ffg ( which is to be evaluated), Ffe (which is the 10 KN you are referring to) and teh component of Ffd in the X direction ( 1.41 cos 45). By balancing these 3 forces we obtain Ffg.
Ffe ( 10 KN) was evaluated in a previous step
I hope this answers your question.

[@allehjames7827]

I had issues getting details from the video , try not to include the write up on the screen. It is obstructive

[@drnafie-structuralengineer4620]

What do you mean by the write up?
If you mean the subtitles (voice transcript), you can remove it by using the CC button.

[@Charcesto]

Terrible microphone right off the bat

[@drnafie-structuralengineer4620]

Thanks for the feedback. I am aware of the problem and I will try to solve it.
Mean while using the subtitles might help you to follow the video.

[@Charcesto]

No peoblem thanks for the video