This engineering statics tutorial goes over another method of sections example problem for truss analysis. You first need to solve for the reaction forces by drawing a FBD of the entire structure. Once you have the reactions, you then need to pass a virtual cut through the truss that “cuts it in half.” This virtual cut must pass through the member that you’ve been asked to solve for. Take only one side of the structure (on either side of the cut). You should have a maximum of three unknown members that you’ve cut through. Draw them in tension, and you will be able to solve for static equilibrium for whichever half of the structure you’ve chosen, because you have already calculated the reaction on that side in the previous step. You’ll have 3 unknowns (the 3 unknown internal forces) and 3 equations of equilibrium (sum of forces in x, sum of forces in y, and sum of moments about a point (usually the reaction).
If you found this video helpful, please consider supporting my work on Patreon:
[ Ссылка ]
Looking for more statics tutorials? Check out all of the videos that I made:
YouTube: [ Ссылка ]
Website: [ Ссылка ]
Looking for practice problems with solutions? I also created a whole set of fully solved statics problems with step-by-step hand calculations:
[ Ссылка ]
Looking for software? I highly recommend checking out SkyCiv. They make a full suite of online structural analysis software and tools that are useful for both students and professionals, including calculators for beams, trusses, frames, moment of inertia and more. It’s great for checking your work:
[ Ссылка ]
Lastly, don’t forget to subscribe on YouTube and join the Engineer4Free mail list:
Subscribe: [ Ссылка ]
Mail List: [ Ссылка ]
Thanks for watching, I hope it helps!
