Why do buildings fall in earthquakes? - Vicki V. May 

"How to not animate faces?" *Cover them with umbrellas.*

0:54 That lollipop frequency model animation made everything clear ! hats off to those who made it

3:33 when my fav song comes on

As a person from a country which constantly shaking by big earthquakes and we had another one recently, i felt great anxiety when I watched the dancing building left and right.

I was too horrified and curious after watching videos of yesterday's devastating earthquakes in Türkiye and Syria, especially watching buildings collapse and being brought down to debris. Now I know the science behind it, thanks a lot to your wonderful explanation...🙏 Respect from India.

That explained why my sand castle collapsed.

3:41 より安定した未来を構築する “Build a better future”

It's official: This is by far the coolest lesson you guys have come up with.

I cannot stop laughing at Godzilla. XD

The umbrella head thing is very clever! I definitely want to use it in my projects. I was looking for a way to avoid drawing heads - faces but couldn't find a better solution than this one lol. And contrary to what most people think, it's not because we cannot draw heads or faces. Many people avoid drawing them for various reasons. This is a genius way to do it imo.

3:25 well I can die in peace knowing that there IS a building made of jelly

This guys covered majority of "Earthquake engineering" subject in just 4:51 mins. Good job

They have umbrellas because buildings are falling down. It's a silly way to represent protection from a falling building.

I wonder why all the signs on those Japanese buildings say "図書," which means "Books." lol

What's with the umbrella ?

Lol Godzilla is just shaking the buildings hahaha

The last line killed it!!! It was perfect.

Made me learn more than school. Love you TED-Ed.

What I learned today: Size and stiffness matter. (check please!)

Would a building shaped like a dome or pyramid/trapezoid be more resilient to these vibrations?

This is incredibly well explained. Nice job.

Never thought Ted-Ed would be helpful with school work [ I’m from Japan ] but here we are Also I see what you did with all the building signs 図書 means library which I guess would mean stories as in “how many stories tall”

Did the animators not have the budget for faces or...?

Beautiful explanation

8th Feb 2023 📍 turkey

God bless you! This was very helpful and interesting.

Here after Turkey Syria earthquake 😞

Thank you for sharing why do buildings fall in earthquakes you are truly awesome and wonderful ^^

I love the reference SO MUCH

very good presentation.

Hey Pew36 what software you used for the animation. The animation you made is awesome. I love the umbrella man. :)

This is why I take Physics in school. Underneath all the complex math stuff... there's more complex math stuff, BUT UNDER THAT, there's practical and cool knowledge like in this video.

Great job

This is amazing, umbrellas...

low frequncy for taller building, high frequncy earthquake for smaller building which frequncy have most earthquake had the most? and you mention about soil type and other factor, what is that? is therr any referance i can read?

"It's not the sturdiest buildings that will remain standing it's the smartest ones" well that caught me off guard

So informtive 🌹

Great video

Everybody gansta until the building start dancing

مين جاي بعد زلزال 2023 😢🤕🙏🏻💔

how long did it take for you to render those collapsing building.

also, what happened during 1985 cd mx's earthquake das wat scientists call "mexico city effect": mainly by the soils composition, which is like jelly, because it was originally a lagoon, making the sismic waves to be more destructive than what they would hace been supposed to.

I love how pretty much everyone is holding an umbrella for absolutely no reason

Great work and analysis on Mexico earthquake! it possible to make the same analysis on the last mass earthquake in Turkey? The shake was really heavy and also it was an earthquake that was 7km deep. What does that say?

you said that engineers design current structures in order to avoid resonance but the concept of resonance is rather obsolete because ground motion is not deterministic but probabilistic and irregular, we cannot predict it like we do in a typical sinusoidal motion (like machines). Every ground motion has different period and it is practically impossible for an engineer to select the correct eigenperiod for a structure to avoid resonance period. Nowdays engineers use response spectrum, a graph that shows the maximum accelaration response of a structure with respect to its eigenperiod, a probabilistic concept. So in the earthquake of Mexico, tall concrete buildings didn't collapse because engineers used large concrete vertical walls(>3m) in the perimeter of building in order to avoid large torsional vibration of storeys, placing the proper reinforcement for joints giving them high plasticity that had damped efficiently seismic energy even with large but acceptable cracks and damages without catastrophic shear failures. Also eigenperiod period is not constant during earthqauke since buildings generally do not respond elastically, as a result every damage or crack in a joint (beam-column connection) would make the structure less stiff increasing thus its eigenperiod, this is another reason why the concept of resonance fails.

Went over my head! Can't you put it simpler!

they couldn't draw anime faces so they covered them with umbrellas genius.

Why are they wearing umbrellas?

why are there japanese subtitles???

Best narrator on RU-vid.

Thanks!

best animation ever

I have the strangest phobia. At 3:30 when the building began the wobble It's made me tense up and become frightened. So much so I had to pause the video and skip it. Anyone know why I had this reaction?

Amazing, short buildings we're collapsing leaving long ones standing in turkey

Yep.....im watching this after a 3 DAY aftershock here in philippines

in most cases buildings fall due too much corruption

Why increasing stiffness will add up their vibrational frequency?

Great! At 61 I realize just how much I do not know!

0:47 to 1:07 is very satisfying!

Lol Godzilla in this video is funny.

Why does everyone have an umbrella.

Funny how i didn't notice the umbrellas on their faces until 3:57

4:21 so the longer one ipunder the floor makes a building move more or less?

I swear this channel makes me grow brain cells

Considering that, engineers could really design buildings that can withstand intensity 10 and beyond. But thats only the for substructure and superstructure. That's only half of the story. Another critical thing is the earth beneath a building's foundation which we only have limited engineering technology to make it resilient to quakes (piles and compaction). No matter how adoptive the building is against quakes, when the earth it is resting on is severly disturbed by quakes, damages occur.

The safest buildings would be the ones that could control and adjust their resonance frequency to avoid the earthquake's resonance frequency. #Earthquake #Resonance #Frequency #SmartBuildings

3:34 that is NOT how that works!

RU-vids algorithm is working fine.

Is there a way to overcome natural frequency with respect to the earthquake frequency

Earthquake is coming to visit us regularly in Nepal. Well, the aftershocks they say. I dont know when its gonna end.

Sooo good

Who else came here after the earthquake of 6th February 2023 (day before yesterday)? I came here to learn about the facts how buildings collapse so easily in earthquake

Tesla knew this wave principle very well , for fun one day he used a small weight and motor to generate a standing wave in a tall 20 or so story building, causing it to sway dangerously. The principle being that at the right frequency even the smallest forces can be amplified to a power of mass destruction Tesla earth quake machine.

What's the significance of those umbrellas?

Interesting, I knew that mimicking the natural resonance of a wine glass can cause it to shatter. I never knew similar things would cause buildings to collapse.

Nice umbrella

Make a video on shrila praphupad!!

What was the whole umbrella thing about?

Nice...

Awesome

3:36 why is he showering with an umbrella lol

what if u upside down during Earthquake does that give you Aids

And don't forget, very tall buildings often have giant pendulums inside the building, not under it.

Umbrellas are a very bad metaphor for protection in this video. It took some effort to focus on the main points rather than on those silly umbrellas. You can't see what's falling on you and run away when an umbrella covers more than half of your view field, and covers the part where the falling objects come from. Please be more careful about choosing your metaphors.

Reminds me of the Neem tree and bamboo Aesops fable

Gotta love Umbrella Guy ...

2:44 if I was in the building I’ll be on each walk in 1 second ow

Would it be possible for us to create a nepali Voice-over version of this. No credits will be changed, only subtitled/voice overed in Nepali. We think it would be an amazing teaching tool given the recent earthquakes in Nepal. Thanks!

At 3:25 that shaking though

What’s with the umbrellas?

In 2020 we've had 2 major earthquakes near Zagreb, Croatia. First was practically directly under the city with magnitude 5.5 and 5.3 aftershock. Second was in December about 50 km away with magnitude 6.4. I was wondering why my 8-story building suffered almost no damage and my friend's 4-story building did in the first quake. But in the second quake my building suffered much more than my firend's shorter building. (Our buildings are very close to each other) I guess this explains it, it has to do with resonant frequency.

3:15 I don't think that in Mexico city, buildings have japanese writings

What a great driver 4:29

This saved my life for a science PPT I had to do.

What happens to suspension bridges in earthquake's

Great work

Why do people live in buildings and not houses?

More Architectural ideas pls!

I love TED-Ed but I don't like how the subtitles in Japanese in the video are badly written just as if they had put the text into Google Translate...

The buildings are just vibing