Shear Design for Concrete Beams | Intro and Beam Test

[@DesignSir1800]

Thanks for this Tyler, appreciate a simplified overview of shear

[@alejandroocampo3204]

Excellent video! It's just what I needed I'm lucky to have found your channel

[@srijeshpradhan6725]

Wish university professors taught like him.

[@mrs.anusham5835]

hello, very nice video, here i need to understand the which crack we can consider as shear crack

[@kushalghosh1559]

Superb video,Dr Ley.Dr ley when a secondary beam is resting on a primary beam, generally there is a tendency to fully release the moments at that junction fully or partially while analysing by Staad Pro.But after a monolithic casting full rotation can never take place thus leading to generation of moment along the width of the primary beam.But partial rotation can take place at that junction but there is no formula by which we can calculate the partial moment releasing factor,so is there a experimental procedure by which we can measure the actual moment that is being generated at these beam to beam junctures and can calculate the degree of rotation taking place and calculate the partial moment releasing factor .

[@TylerLey]

Kushal - I wouldn't be too worried about this. As long as you provide a viable load path for your structure then it will always carry at least that amount of load before it collapses. I know this sounds crazy but this is structural resiliency. As more load is placed on a beam then it will just crack and possibly cause the steel to yield and then distribute loads to other parts of the structure. This will keep happening until the entire structure reaches it limit and then it collapses. We just need to apply reinforcing with enough ductility and proper detailing to transfer the load. This means that if we get the exact load path to failure wrong or the stiffness wrong during our analysis then it doesn't matter! The structure will at least carry that load and will likely carry more. You can learn more by checking out my video on structural resiliency. You can also read up on plastic design methods. I cover some of this in the steel videos that I have posted. Thanks!!!

[@kushalghosh1559]

Dr Ley,Thank you very much for such a detailed answer.I will go through the videos mentioned by you and then get back to you. Sir,I will be submitting my Ph.D thesis on geopolymer composites in a few weeks. I am looking to apply for post doctoral positions abroad,if you could give me some advice on where to apply and whom to approach,I would be really grateful.

[@hamzamMR]

thanks mr tyler !!

[@paulamarielle9299]

Thank you so much for this video!

[@mutasem1335]

Amazing

[@EmpoweredPercussion]

Hello, great video and I was wondering what the load weight was before it cracked and weight at one inch vs two inches; 5000 lbs, 10,000 lbs? I want to make a tiny cabin out of aircrete. I thought instead of buying to much lumber for the raised base I could use my own cast I beams. In addition I think I could make my own deck or deck boards from aircreate.

[@adithyasundar2017]

why did the cracks develop from bottom while beam failed at the top?

[@simengg7824]

Can we analyse , how the stirrup induces shear strength?

[@TylerLey]

Yes! That is in the follow up video. Look for it soon.

[@keshavaraghupathi4869]

20 ft length beams 6inc and height 18incs can i put stell roads 20mm 2 bars in top and bottom 20mm 2 bars pls explain me pls tell me sir pls sir

[@MissJami]

Do you have a video concerning the selection of reinforcement size?

[@TylerLey]

It should be out on Thursday! I will have some example problem videos after that if people are interested.

[@yellow_spectrum5806]

You sure do love concrete...ozmo kept getting lost in stem camp lol

[@TylerLey]

Yeah it still needs to get better! Thanks for the replay Cuber!

[@josealfredoguzmansalinas3772]

Hi Dr. Tyler! First at all, thank you so much about your videos, are very illustrative and... I'd like to learn more about the "dowel action". How do the dowel force arise?

[@TylerLey]

When the concrete tries to break in shear there are many things that contribute to the strength. One thing is the rebar itself having to fail in shear. This is called dowel action. The shear capacity of the rebar is not specifically taken into account in the calculation. Instead, it is included in several of the other terms. Does this help?

[@josealfredoguzmansalinas3772]

Thanks Dr. Tyler, yeah... that's sufficient... regards!!

[@aaronastolfi7478]

Why is Vdowel assumed to be zero?

[@DesignSir1800]

I'd say you found your answer by now! but in case anyone else is wondering If you imagine a force pushing the dowel out towards the edge, where it only has 50mm concrete cover - this concrete would not hold the dowel in place and would fail much earlier than dowel shear capacity A lig would hold it in place - but this is already covered by the value of Vs

[@born2die688]

Damn u r too good