Reinforced Concrete T Beam Design Example using ACI 318 | Neutral Axis in Web

Reinforced Concrete T Beam Design Example using ACI 318 | Neutral Axis in Web | PE Exam Prep

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After watching this through you'll be able to solve the capacity of ANY concrete member shape.
Kestava Engineering shows how to find the capacity of a reinforced concrete T beam with a design example that walks us through the ACI 318. This design example is very likely to show up in some form of the civil / structural professional engineering exam. And I know for a fact all you college kids are going to have to know this for your advanced reinforced concrete homework.
Grab a seat, get on the zoom class, grip the leather seat and lets dive in.
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Пікірлер: 33

@djphonix 3 жыл бұрын

Good stuff, man. One item though, the effective flange table refers to the clear distance to the next adjacent web rather than the C2C distance. Otherwise, great job explaining the topic!

@Kestava_Engineering 3 жыл бұрын

Philip you are absolutely right! man read it and looked right over it. thank you for the correction, and thankfully it did not control in this instance. keep checking my work! I always appreciate it.

@Kestava_Engineering 3 жыл бұрын

SHOOT IT DOES CONTROL!

@djphonix 3 жыл бұрын

@@Kestava_Engineering hehe yeah I noticed it controlled while watching and was thinking “aww man, I hope nobody roasts him on this!” Really enjoying your videos so you won’t get any roasts from me 👍🏼

@Kestava_Engineering 3 жыл бұрын

@@djphonix My man I appreciate all the support! Keep me honest always! also it looks like the totally capacity is still correct as the effective width would still be up to 34" so we are OK from a liability perspective haha. dodged that bullet... this time!

@jonathanlitoff5142 2 жыл бұрын

@@Kestava_Engineering If the width of the web is constant, then wouldn’t b.web + clear span always be equal to the dimension between web center lines? For this problem, it would be 10” + 24”, or 34”. Also, I really enjoy these PE related videos

@sallymcfadden3940 2 ай бұрын

These videos are really outstanding. Clear and so well delivered with humor and goodwill.

@jacksonmurrell445 3 ай бұрын

Thank you Rich!!!! Please continue with these videos, you do young engineers a huge service.

@mirandavictoria7150 Жыл бұрын

Your making me feel good that I keep catching these little mistakes! Love your vids

@Kestava_Engineering Жыл бұрын

Glad to help! and thank you!

@antoniocavalli8933 4 ай бұрын

keep up the good work

@chandrasajana2299 3 жыл бұрын

thanks man, keep going!!

@elbahja03 2 жыл бұрын

Great video man , as always, thanks a lot! I think you're missing 1 more step after you got you "a" value you should get your "c" value and do a strain compatibility check to make sure you're in the TFC zone, otherwise your reduction factor may be lower than 0.9 and thus your ultimate moment capacity may be lower. Thanks!

@Kestava_Engineering 2 жыл бұрын

Good call! tension force controlled members is for sure a must do check!

@user-ib5lb6kz8y 2 жыл бұрын

So helpful. Appreciate for your efforts. BTW, what about the case to find the reinforcement area (As) if the moment capacity is given? Is it the same approach?

@jonsoh5309 3 жыл бұрын

this is very helpful! Could you do a similar problem where you have to find ultimate moment but with fully composite beam?

@Kestava_Engineering 3 жыл бұрын

Jon Soh consider it added to the list my dude. I see you like to spice things up.!

@user-gt7wf8nq6q Жыл бұрын

Thanks for making these! Quick question, should your a value be the NA of the compression area from the bottom not from the top? That way you have the correct moment arm distance to the tension force. I am finding my a = 1.22".

@sugassuwag7513 3 ай бұрын

a is not the distance from top to neutral axis, it is the width of the compression block. therefore he use Mn = .85*f'c*Ac*distance between T and C. Distnace between T and C is calculated as 12-1.04 = 10.96"

@sereneobscene 6 ай бұрын

Great video, like all of them! One question though... at the end, shouldn't the moment equation have ("a"/2), so (1.04"/2)?

@aej-xw7hi 5 ай бұрын

No, since a is the total height of your compression block for a rectangular section, a/2 is actually the centroid from the top of beam. Since you're finding that centroid distance through the summation of areas for the T beam, dividing by 2 isn't necessary.

@aej-xw7hi 5 ай бұрын

16:52

@huseyinsanal 9 ай бұрын

Thank you for videos, so helpful. I like your engineering approach. I have an question regarding effective flange width. As per ACI 318 ( 6.3.2.1. ), the effective flange with bf shall include the beam web width bw plus sn effective overhanging flange width in accordance with Table 6.3.2.1. I think effective flange width calculated as bf=bw + min ( 8h, sw/2,ln/8). Am I wrong, if I am where is my mistake? Thanks.

@Kestava_Engineering 9 ай бұрын

you are correct! just remember you get to take the value and multiply by 2 to account for each flange. I may have made a mistake in my video!

@muhammadasadameerkhan8105 2 жыл бұрын

perfect video. sir can i have get in contact with you for some knowledgeable discussion??

@Kestava_Engineering 2 жыл бұрын

email me anytime! my contact email is in my page description

@winterpalace2307 3 жыл бұрын

Can you do base plate and anchor bolts design for steel colomn please, I have been looking for it since a while now . Also would you mind giving me your Email in Case I needed to ask questions , thanks dude you're doing a great job 👍

@Kestava_Engineering 3 жыл бұрын

Winter Palace - I love the idea, consider it added!