Skyscrapers, Statics, & Dynamics: Crash Course Engineering #26

[@JaimeNyx15]

Parvati and Padma? Nice Harry Potter reference. ^_^

[@Snowmunkee]

Caught that too!

[@francoislacombe9071]

During all that talk about statics and dynamics, I kept an eye on those weird shelves behind her.

[@TheResidentPsycho]

One of the most interesting episode in this series

[@RangerRuby]

Very true!

[@LifeAsJester]

Now everyone who watched this knows almost as much as me and I've done 3 years of this in school lol

[@cpi23]

dude we are watching this stoned and aren't doing the applied math!

[@RangerRuby]

That's what Crash Course is for!

[@engibear6392]

*A B.S. in Civil Engineering only teaches you just enough to be dangerous. An actual Structural degree is presumably better, but in the end school is only the beginning of your engineering education.*

[@AlicesWondereland]

I'm about to sign up to engineering school and challenge the final on my first day!

[@Bob-jn8jt]

Love this!!! I finally understand static and dynamic. I was really struggling in class. Now for some reason it all makes sense. (Not being sarcastic). Really thank you for this episode!

[@dishakhurana6739]

Parvati and padma😊😊I am happy to hear these Indian names!!!😊❤

[@RangerRuby]

That story at the beginning must have been so scary! Engineering is very important in our everyday lives and that show in that story!

[@treelight1707]

Love the series. The animations and the pace of everything. That engineer was kind of careless to people living in the building. He knew it was dangerous, but still didn't say anything?? He was damn lucky nothing happened during the time.

[@ilikemusic2726]

My university combines statics and dynamics into one class. It is notoriously the hardest class at my university. I have my first test in 2 days and am using this as a “I’m kind of studying” distraction. The first test has about an 80% fail rate. Wish me luck.

[@shaunaisaJellyBean]

We need an episode on bridge types and how they work plz

[@AlipashaSadri]

A Civil engineering and a physics student walk 'onto' a bar and soon they talk about "moments" and "torques"... the great confusion ensues!

[@Someone-cr8cj]

This is a really enjoyable CC series!

[@RangerRuby]

I feel you! This is so interesting and fun!

[@oreubens]

5:38 The idea shown here isn't a suspension bridge, but a cable-stayed bridge. Should be obvious since nothing is actually "suspended" in that particular concept.

[@ridwansetiadi8393]

I suddenly remembered the difference between suspension bridge and cable-stayed one hahaha. Thanks...

[@engibear6392]

*I concur.*

[@johndavid360]

Had to watch this for homework lol

[@johnmacdonald1094]

I worked in that building at about that time. Luckily it wasn't the one in sixteen.

[@SunriseFireberry]

May the Force be with you.

[@paramjeetkaur1433]

CAN U GUYS DO A CRASH COURSE ON SIKHISM-JOHN GREEN

[@Hambxne]

Funny you mentioned the citicorp building, I just listened to the 99% invisible podcast on it last week!

[@engibear6392]

*An episode on statics with no truss diagrams? :(* *Also, the second bridge is a cable-stayed bridge, not a suspension bridge.*

[@AlipashaSadri]

Only a civil engineer would notice (and cringe) at the cable-stayed being called a suspension and immediately afterwards a comment about loads being carried by the cables (and no mention of the deck that will be in even more critical compression)

[@zhubajie6940]

I thought you should have presented D'ALembert inertial forces and torques for FBD's as saying a dynamics problem can be instantaneously modeled as a static one for each geometry in an instant in time as an alternative way to look at FBDs.

[@psikeyhackr6914]

So where is the data on the distributions of steel and concrete down the structure?

[@dan1204hc]

You can work and research Skycrapers, Statics and Dynamics following the career of Civil or Mechanical Engineering.

[@user-zo3wy4we3t]

She was on scishow and same topic too...

[@shaunaisaJellyBean]

Or can we have one on building materials! They are really interesting

[@abdallababikir4473]

70% of comments: What an interesting video 20% of comments: Better than my teacher 8% of comments: Your shelves are crooked 2% of comments: Me

[@ryze5431]

me

[@FellowgoofyGoofer]

3

[@oldcowbb]

why the very first engineering course ends ip at ep 26 tho

[@ChessMasteryOfficial]

*When I despair, I remember that all through history the way of truth and love have always won. There have been tyrants and murderers, and for a time, they can seem invincible, but in the end, they always fall. Think of it--always...*

[@Azdur]

Lys 2017den önce atsaydınız keşke fizikte işe yarardı...

[@jasonh4534]

I enjoyed my Statics and Dynamics course... And then I became an Avionics tech rather than an engineer.

[@andybearny]

Okay that's great explain the WTC 9-11 collapse. I'm intrigued.

[@GamesFromSpace]

They were hit by gigantic planes. That's a lot of dynamic forces.

[@engibear8966]

*Progressive collapse initiated by column buckling due to a combination of reduced stiffness and initial out-of-plumbness from elevated termperatures.*

[@kadeschuman8253]

Hi, I wanted to throw out the idea to go back to some biology and make updated videos with current facts (as science changes all the time) and more pictures and diagrams for a better and easier understanding of biology. Thanks!

[@95GuitarMan13]

That "industrious team of engineers" who "managed to save the Citicorp building" were, as you said, the company that that botched the design in the first place, and their actions were made all the less heroic by the fact that they hushed up the information until the repairs were carried out, even when a hurricane almost hit Manhattan while they were halfway done... I know this series likes to glorify the engineering profession but that was a poorly chosen example.

[@unleashingpotential-psycho9433]

❤️🔥🔥

[@realdealholyfield9616]

a bit of humor wont be bad.. Is that too much to ask ?

[@williamsmith7221]

I have no idea what you just said

[@cpi23]

start at the beginning again

[@humanrightsadvocate]

Now do a video on 9/11 and explain the collapse of: WTC1, WTC2 and WTC7.

[@yaddahyaddahyaddah2709]

That's easy: two planes being flown into the first two buildings and then massive pieces of the the collapsing towers hitting multiple adjacent buildings besides WTC7. But you go ahead and keep believing whatever you want LOL

[@humanrightsadvocate]

Oh! So that's what happened! OK, thanks! @@yaddahyaddahyaddah2709

[@robotguy4]

Also, while fires at the temperatures cited can't melt steel beams, they can make the steel hot enough to bend and deform, changing the static structure (a standing tower) into a dynamic one (supports fail).

[@humanrightsadvocate]

And instead of a slow and progressive bending of the building we saw a _sudden vertical collapse_ as if the internal support structure was being destroyed by explosives. Only the steel near the fire was hot, the rest of the building was cold and 100% capable of supporting multiple times its weight + the weight of everything inside it (it's called safety factor). You're either dumb or a troll. @@robotguy4

[@engibear8966]

@@humanrightsadvocate *Compressive buckling of structural steel columns is a stability failure mode, not purely a materials strength failure mode. Once stability is lost in one or more columns, partial collapse can be quite sudden. Assuming that the adjacent columns already have reduced stiffness due to elevated temperatures, it isn't hard to imagine how a disproportionate total collapse would be initiated by dynamic loads from falling concrete and steel. While I can't say I've personally done a multi-million-dollar forensic simulation of the event, the WTC collapse certainly passes my sniff test as well as those of any practicing structural engineer I've ever come across. I think that @robotguy4's explanation is fairly decent coming from a layman.*

[@MEIKLE02]

❤ Can I get a Heart?

[@chicken7532]

congrats buddy, u got a heart :D

[@rustfade4419]

first lol

[@user-np2tz8lu3u]

First