Method of Virtual Work - Truss Example (Part 2/2) - Structural Analysis

[@triciamartinez5654]

YOU ARE A LEGEND. THANK YOU FOR GIFTING US WITH UR KNOWLEDGE AND WORK OF ART. AMAZING 10/10

[@structurefree]

Legend...wait for it....

[@coolvibrations8817]

2:35 my parents when i moved out of their house

[@kealebogapoifo6703]

I have an exam coming up in a few weeks nd i have to say, u saved me, thank you 👌

[@peachbass]

Top lad! Much easier to follow than my lecturer

[@RicKohJeh]

Your knowledge is so useful to us. Thank you so much!

[@janel8154]

Thank you so much for your videos, explanations, and work!

[@ekarajprakobkit8406]

With out you , I may not pass the exam. Thanks!!!

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[@alphashark9194]

you're still carrying in 2021.. built different

[@Foodis220]

Are there any videos covering statically indeterminate truss also in your channel?

[@guysensei1152]

Your a fucking legend bro, saviour of engineers

[@glyry1]

how would you do displacement at point D??

[@structurefree]

are you referring to load combinations?

[@yoeymusic]

Hey, say we're looking for vertical displacement; after we find all n-values and all N-values, do we only consider the vertical contributions of each member? or do we include all contributions (vertical + horizontal)? Thanks!

[@Rybo16]

Hey, great vid, my professor wants us to comment on the result and whether it's in the allowable range or not? how do you do this ?!

[@structurefree]

+Ryan Clarke if you had to do that you would need an allowable stress or material property to compare to.

[@renecampa6112]

The problems have like floor plan views and then ask to find the tributary area to find the loading on beams or girder. Im having a hard time understanding when to use the 45degree rule for the tributary area.

[@sabesta]

Great vid! The units are incorrect in the nNL column though, I believe. They should be kN^2 * m. The virtual load of 1 kN on the left side of the equation will cancel out the additional kN on the right side. Please correct me if I'm wrong!

[@carultch]

The virtual load has no units. We assume it is 1 arbitrary unit, which is simply a proportion relative to the units of the original load.

[@renecampa6112]

Your videos are very helpful, I have a final coming up in a week for structural analysis. Is it possible that you can make a video covering deadload and liveload and how it applies to loading on beams?

[@tagelasfiarania6519]

the direction of the virtual load how do determined it??

[@structurefree]

It is more of a prediction. You guess up or down and if you get a negative it means it went the opposite of your prediction.

[@akshaysingh4712]

a struss structure pinned to the wall, members -A, B C (top) are equal length L and members E and D (bottom) are also length L, -A and E and L length spaced apart vertically, -A and E are pinned to the wall, -Applied load W at C -diagonal member from E to B and another at D to C (45 degree angles) what is the deflection at D? i've stuck with this question for awhile, can you help me please? A___B______C l l l____ l E D (sorry i couldn't draw the diagonal members)

[@MrLazygrasshopper]

Sir, pls post a few videos on lack of fit, effect of thermal expansion, etc., w.r.t truss. Will be very helpful. And your vids are great. But you already know that ;)

[@danielwilliams3378]

Hi prof, how to solve statically indeterminate truss with both internal and external determinacy? Can't say anything other than my huge thanks to you

[@SuperSnoho]

better than my profs

[@structurefree]

+Mcskeevely ball so hard mofos wanna fine me.

[@thegnosticland5079]

Good video am from India

[@degekkemarokkaan]

After doing the statics I figured out that member bc was 12,5 kN in tension. I did N*L / E*A and I got the same answer as you got. So is it necessary to use the the virtual load?

[@thomasmcnamara9970]

Jo DO the virtual load method is not for finding internal forces of members, you use the internal for members to find the displacement(delta) of a certain point in a truss or beam from the virtual load method

[@glyry1]

the vertical displacement at D?

[@perrysopinsky7278]

Why was your total area only 500 mm^2? In the first video you had each cross sectional area being 500 mm^2, but there are two triangles. I believe you wrote the equation as the sum of the areas.

[@thomasmcnamara9970]

Perry Sopinsky you only add the sum of the n.N.Li as seen at 2:41 in purple you bring the EA out the front as you would if you were using the double integration method for elastic curve

[@richardah12]

At the end, 18.75/200 is not equal to 0.1875, I think you divided by and E of 100GPa to get your answer.

[@reginamatus1082]

thank you!

[@onurbulduk5019]

Thank you so much!

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lovely!

[@ناديالنجاح-ع2ض]

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[@saadb859]

structurefree = B.A.W.S.S

[@structurefree]

Not entirely sure what B.A.W.S.S. stands for. I'll just pretend it stands for "Balla Analyzing Wicked Structural Systems". uh....word.

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structurefree ^^^ that's how I know you are a B.A.W.S.S!

[@travboat]

structurefree Do some structures! (Like a bawss.) Ride a turtle! (Like a hawss.)

[@benjaminteeling3870]

Great video, you make it seem so simple 🫵🏼

[@jaclynmcclelland9351]

Thank you!