Houses Tested On Earthquake Simulation Tables From Around The World
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- čas přidán 14. 08. 2020
- This video contains a series of tests from many countries on shake tables showing what causes homes to collapse.
See why catastrophic damage occurs, what violent shaking looks like from inside a house, and discover the largest shake tables in the world.
These tests show both how vulnerable many houses are and how in many ways they are stronger than would be expected. - Zábava
Worked for EQC (Earthquake Commission) in NZ after the Feb 2011 quake. I had a home owner comment after their double story house lost all the brick cladding off the exterior from the first quake and that once ply had been temporarily fixed to the house it didn't notably flex in the significant after shocks.
@Charles Richter nice handle tiger
I saw some videos of the 2011 NZ quake. It was pretty frightening. I'm glad I wasn't there in that highway tunnel through the mountain or near some of those buildings or near the big bluff with the houses below or . . . Just going to stay here in California . . . although we are going through some nearby flooding . . .
Yes, plywood is king and is amazing in what it can do to resist earthquakes.
Kia ora.... Thank you for your input... Nga mihi 💯
Actually almost all of them are tests in Japan. Only last 2 tests are not Japan. 3:46 one could be not Japan.
To watch those tests more, copy and paste this word 耐震実験 or 耐震テスト The word means Earthquake resistance test.
I know the videos are Japanese one. Because I'm from Japan and was working as an carpenter before.
Thank you. I did not know that.
How is the urathane panel attached? Is it better than plywood for earthquakes?
Would it be the table at E-Defense? I understand it is the world's largest 3D shaker table with a surface area of 300 square meters.
Tanks❤
i must comment to say that there is 69 likes at this moment and it is nice
so they just clean up a whole house every time is shakes
That is right, just a broom and dust pan is all you need.
Or tip it back over upright.
Bay Area Seismic Retrofit oh yes most definitely why did i never think of that
@@ubme21 i was to
+Pug pro productions
becuase you replied them.
This really hammers home how scary earthquakes can get, geez 😟
Only scary if you live in a 3rd world country like Turkey.
Would be nice to know: Simulated earthquake magnitude + type of house and where it is most commonly found
No shit.
I did a job for a guy from Germany where the houses are all made of concrete block and he told me the houses in the U.S. were like the housing that was built cheap and fast right after World War 2. It is true, the houses here are not built to last with or without an earthquake.
He's not entirely correct--concrete blocks and morter are one of the most susceptible materials in an earthquake because they don't have any flex (so they just break when force is applied). Wood may be cheap but it can bend without breaking far better than stone. You do still need to attach said wood to the foundation properly (and the US definitely has a problem not doing that properly), but wood itself isn't an enemy in earthquake zone, bricks are.
Unless that concrete block house has a LOT of steel in it, it would be a death trap. Far worst than wood. Germany however is not in an earthquake zone, so no real problem.
I used to think the US were a bunch of cheap-ass nutjobs, but I see the appeal on cheap buildings now: they're easy to replace when the owner doesn't claim it anymore.
of course you're not going to actively go about and put houses to the extreme test every single day... they're built cheap so they can be taken down after a number of years.
you build them "to last", but what happens if a number of years from now a technology comes up that's several orders of magnitude better than what you have? how do you take down that building that's built "to last"? you'll be phased out by several years and orders of magnitude with relation to the rest of buildings, by the time your building is truly "phased out" by it's own integrity.
I live in a brick house, and I had to improvise some sealing and weather proofing because the wind leaks through the smallest gap in the windows and doors..... nobody thought of that, at the time.
they lost the war.
no round houses?
That was insightful. Thanks!
Be nice if this had a source of magnitude used for each demonstration on the video
The seismic waveform of the 1923 Kanto earthquake is most commonly used in Japan's seismic experiments. 100,000 people died. Magnitude was 7.9-8.2. It is estimated that it would have been a seismic intensity of 7 on the Japanese seismic intensity scale in the 21st century. The 2011 Great East Japan Earthquake had a seismic intensity of 7. Japan's seismic intensity scale is up to seismic intensity 7 and there is no more than that. Because it is meaningless.This is Tokyo.
One thing to be noted: the earthquakes shown here are extremely large
Yeah, idk what kind of level it has to be to throw couches like that
@@mrmr4622scarily, I live in California (The 2nd most prone place in the world to earthquakes) and it does not take a high magnitude to do that. Heck my tables topple over in my room at a magnitude 3.
Yeah, thinking 8.6 or higher.
More power to you! Being able to actually determine HOW the ground moves to simulate an earthquake..? Amazing 👏!
This is so amazing!!! I am sa thankful that i found this video!!
Be sure and subscribe.
Super interesting, thank you for posting.
Incredible footage, thanks for sharing.
It is a very interesting process. Would be very interested to see a compressed stabilised earth brick building tested for earthquake reisistance. It would also be interesting to see how having 2 1/2" and 3/4" gravel, bound together under a 15" thick raft foundation would stand up to an earthquake. A man used the gravel trick in the foothills of Adelaide, Australia, in the 1940's. His house was the only residence that did not crack in the 1950's earthquake, but, using fortecon plastic attracted white ants to his home. The idea is that the gravel takes the shock loading from the movement, and having a thick slab should allow the whole house to move as one.
From my observations, if you tie a house together, and make it fairly solid, there is a good chance that it will be standing at the end of the earthquake, protecting those inside the home.
Sounds like an interesting test but it will be hard to find someone willing to do it.
You need shear resisting elements like wood, or steel rebar.Once the shaking overcomes the dead load of the building it's gone.
@@designstudio8013: Yes, am working on a project that has half inch deformed / twisted reinforcing every two feet vertical and horizontal, all core filled with cement. Then, in the upper levels, 3/8 inch sheet with 1 inch deformed bar, run at 45 degrees to the sheet with the crossing lines at random intervals, refer Citi building and Surfside Towers for my thinking. This is supported with 6 inch square hollow section that is tied into inner and outer walls, in both directions. This supports the floor on each level.
It was JESUS who saved him
@@migs6674 you mean jesus the builder who showed up with his crew of hispanics? I think so too.
Have experienced 1000 of earthquakes and these shake table demo (both small and full scale). Proper design is key.
Very interesting. Thank you for sharing.
Took me 30 second to realize they were testing full sized houses lol
Incredible job guys my respect thx so much to Share this video
Would love to see a plywood bracing test, but with added spray foam insulation plus plywood. They always use the 300% stronger walls as a sales pitch.
You're looking for SIPS to achieve an earthquake rating. Stick built for the mass market has never survived a shaker table test. It has become code as best practices, but not truly certifiable.
I don't think spray foam will stand in the way of an earthquake
@@lollipopyummy4924 whoooooosh
@@SourBogBubble oh.. it was a joke. Lol
@@lollipopyummy4924 no, spray foam can't be used without plywood. So your statement Clearly states this comment went 50 ft over your head. Considering plywood owned this test like a black belt va 5 year old.. yeah 50 ft might be too low.
The most earthquake-resistant house in Japan is a wall-type RC house.
What is RC?
@@bayarearetrofit5814 RC houses are concrete houses.
Reinforced concrete house.
It is a concrete house reinforced with reinforcing bars.
In Japan, it is called RC housing, but isn't it called RC housing in the world?
@@RC-RCdesignstudio
Are the wall-type RC hoses floating on the foundation?
It seems to be a good idea to have a sturdy footing that is not attached to the foundation.
@@RC-RCdesignstudio in taiwan, it is also called RC house.
In US, there are no such robust houses, so they probably have no idea
@@Drottninggatan2017 @bayarearetrofit5814
czcams.com/video/es_a1DcBXqk/video.html&ab_channel=%E9%99%B3%E6%B0%B8%E5%B4%A7
yeah they will have footing underground like this one.
Was the last one at the PEER Lab? Years ago, I watched them do a test on a freeway column and before that sheer wall retrofit test.
Yes it was from the PEER lab.
Do they put weighted stuff in the upper floors to simulate what it would be like?
My house had a real earthquake shake table test during the 1989 Loma Prieta earthquake here in California. We are about 12 to 14 miles from the epicenter. We had some broken dishes and a small crack in the fireplace chimney(didn't need repair). Fortunate, to the max.
In Sydney, Australia, the middle eastern builders who construct high-rise residential buildings, after the reinforcing steel has been checked by an inspector, remove a lot of the reinforcing and take it up to the next floor. Sydney is so rife with them that you shouldn't buy a building built after 1985.
Australia sucks anyway.
Vile cat killing. EVIL!
osb or plywood bracing will make your house much stronger. Most modern houses are required by code. Older homes only have cross bracing by 2x4, which is not enough
Older than…. What???
Plywood is much more resistant than OSB. OSB is brittle and breaks away from the nails or staples holding it.
It is enough. Wood houses are nailed. This makes the house flex in a quake. They are very safe in a quake. You are more likely to be injured by falling objects.
Even though some structures didn't fall they may still have to be torn down.
What are your thoughts on older homes with 1x8 or 1x6 t&g used as the sheeting? If foundation is properly retrofitted do you think it will hold up ok vs plywood or usb sheeting?
You'll want to look into SIPS for that earthquake survivability at an affordable price. Just look at Turkey right now.
Yes. Plywood is best, but that wall will provide some rigidity.
no
very good simulation, I am totaly amazed by the look and quality of this test. It seriously simulated the danger of earthquakes. So I wonder one thing: how big is the chance for an old brick house, which is 50 years old, to collapse or taking harsh damage within a 5,9 earthquake?
I would not want to be living in it.
2:34
Piece of wood: IM A BIRDY
haha so funny
When you suddenly feel like Simone Biles:
Good idea!
Turkey has left the chat.
brings new meaning to tiny homes.
Be nice to have more info on quake rating and how they were built and why they failed
These look like massive earthquakes being simulated. You can make buildings stronger, but people can still get injured from falling/moving furniture. Truly terrifying. 😳
Atleast the building is not falling if it fell down, the people outside of the building may not survive
I think the point here is survivalibity rate. Better injured than be dead. We are talking about force of nature here be it earthquake, tsunami, tornado, volcanic eruption, human can only do so much against them.
Everyone dies. Chill.
Use the construction methods they used in the Forbidden City in China. The reconstructed buildings can withstand a 10.0 quake. It's fascinating how much the building will move with the ground but still remain sound
Why is this so relaxing?
(First one) *House collapses*
_lights flicker_
So how is this test modeling wall foundations depth? is it with an union rigid enough (like a regular concrete footing) between the base and the walls?
I live in my Native timber built house which was constructed in 1914. Its seen some quakes in its time here in NZ.
Move to Christchurch.
Here in Mediterranean Europe we call these cardboard houses
Yeah, also where I live! There are only concrete houses, execpt really old wooden houses. But they are too small to be threat
Concrete structures are prone to pancaking
@@myextrachannelireallydontn4155 no. All the skyscrapers and big buildings in earthquake zones are made from concrete.
Don't comment on things you know nothing about
Like the ones in Turkey....
@@stevenlang9849 question
Why skyscrapers are made of concrete in sensitive areas while we recommend wooden frame for homes?
I'm not at all in this business, but it was very interresting. tks.
In these examples it seems to be the ground floor that fails first. Putting triangles into the building frame makes it more resistant to the shaking (you can't distort a triangle).
Buttressing has been around for centuries. Too bad so many modern architects ignore the benfits.
Plywood by itself creates triangles.
Triangles? interesting. Karra indicates a slight downward tension.
so basically, contrary to initial belief, I probably have a higher chance of survival falling 15-20ft by staying on the second floor, rather than staying on the ground and getting crushed by said falling floor
angles are more difficult for the human brain.
I saw a test on a cob home (mud) it broke apart completely into big chunks. Would like to see tests on rammed earth, straw bale, hemp, aircrete, earthships and soil in bags homes. Sometimes saving money can be very expensive in the long run.
Hi mori have you become a flat earther yet? If not I suggest watch a 13 part series called _What on earth happened_ by Ewaranon to learn that the earth is not a globe. I got it in my about tab.
its not that house dont crumble or take a hard hit, but its not burrying you alive for once. even if the house is a write off after. the people insinde come out alive.❤
This very interesting to watch in the days after the 2023 earthquakes in Turkey and Syria.
Hi feeberizer have you become a flat earther yet? If not I suggest watch a 13 part series called _What on earth happened_ by Ewaranon to learn that the earth is not a globe. I got it in my about tab.
Imagine chilling there thinking it was just a design
It isn’t so much the quake than kill you it’s the structure when it’s not properly engineered to protect you resulting with devastation and failure.
In the side by side tests are the houses the same?
Car shock absorbers can be used to absorb earthquake energy (timber house).
Sorry I am so late in my reply. I did not know where to find the comments. Send me a photo
I've heard about stablizing systems that react to dampen earthquake waves. I'm not an engineer, but as I understand it the system reads the acceleration of the incoming wave and then a computer directs various hydraulics and springs to produce an opposing acceleration. It would be interesting to see a demonstration of this in action.
Hi westofearth have you become a flat earther yet? If not I suggest watch a 13 part series called _What on earth happened_ by Ewaranon to learn that the earth is not a globe. I got it in my about tab.
@@flat-earther the earth is more oblong then round. THE EARTH IS NOT FLAT
@@flat-earther I don't care about whatever 100-page article you read, I already saw the earth from outer space and it was round
A software bug triggers is a few seconds out of phase, and it accentuates the movement, basically exploding the house. Whoopsie!!!
lesson i learned: when there's an earthquake, immediately climb to the 2nd floor of the house and hide under the table with covered blanket... skipped the 3rd floor because it like likely will fall in the ground and the 1st will be crashed by 2nd floor..
Good advice! You need to write a safety manual.
Was this video recorded using fridge? The resolution is so low.
I've always thought a caravan would be pretty safe because there's not much to fall on you, and they are designed to be moved about
You would be very safe. Live in your van down by the river.
The plywood cladding is pretty amazing. Cheap comparatively.
Yes it is. Then cover it with siding to make it more attractive.
Okay so what I gathered from this is stay on the top floor in an earthquake
I wonder if any of the shake labs have experienced an actual earthquake while in the act of simulating an earthquake?
Haha! And then the real earthquake balances out the motor of the shake lab and the house is fine.
When the test is over
*but the house keeps moving*
On our reservation, we had brand new brick homes everywhere, but then a small earthquake destroyed most of them 4 years later.
Where was this?
@bayarearetrofit5814 On the Mescalero reservation in the early 2000s. The homes were built on the sides of hills, and nobody wanted them. A lot of homes here are wooden and sit on stilts on the side of hills.
That's amazing how they build an actual 3 stories high building just to test if they are safe, safety first👍
It is not ''a real 3 storey building'' ... they are small scale models of three storey buildings and are made with the same materials, but in a smaller scale
@@ilpatriota8241 wrong
@ilpatriota8241
No, sir.
Although simplified, everything is made in actual size and experimented with the intention of destroying it.
I wonder if they could build structures on a 'floating plate' - ie one that's decoupled from the ground. It could be held in place under normal seismic conditions by impact absorbing light materials, but when there is a sheer load, these materials would buckle and absorb the lateral load to reduce the movement of the central platform.
It all depends to on if the structure is higher than one story or not. A one story structures has a better chance of surviving because it's more likely to go with the shifting. But then again if the structure has a fairly heaving roof then the chances of survival decrease.
Everyone wants to tie the house to the foundation. But if it isn't the house as a unit would slip off. Then after the quakes, just tow the house back onto the foundation!
@@hughdismuke4703no tile roofs! The Kobe quake in Japan, tile roofs did not fare well.
@@scottslotterbeck3796 yeah that too.
Is this the Simpson Strong-Tie testing Lab?
Note to self, do not be on the lower floors during a quake… run outside
And here I assumed GodZilla was their most feared event.. I stand corrected (while holding on to anything I can!) Amazing video.. Sad. But Amazing none the less. And I thought I was watching models until things got real big.. Full Scale baby!
can I borrow your shake table for my thesis?
I have to wonder about the magnitude of the earthquake being simulated starting around the 6 minute mark? This looks to be getting into even if the building is fine, you need to bolt down the furniture so you don't get hit and killed by it slamming into you. Maybe even sleep strapped to your bed so you don't get knocked off in the middle of the night.
Live in a cave.
@ the 3 minute mark.....do you know if those structures had hold downs in addition to the plywood bracing?
I think it was a before and after. No hold downs before so I doubt there were any after.
Impressive
I'm assuming we're seeing the difference in nail counts, this is why new houses fail in small storms if its not nailed or built properly, a house should rip and splinter not fall apart in a split second.
What about when roofs have 4 to 5 feet plus snow on them of varying pitch as we have here in Alaska, Mat-Sue?
Good question, and no-one can tell you the answer. I would think the extra weight would help but all the engineers would say "we don't know anything unless it is tested", they really get stubborn when it comes to computer modelling and the facts be damned.
Obviously your roof structure is built to take that extra loading of snow. I think I would rather be in your house than mine in an earthquake
Oh boy Time to Clean this mess up
This 2037-2041
Smash Hit The Earthquake Sustainability
Houses Tested On Earthquake Simulation Tables From Around The World
0:29 wow the power of the left house has survived the impossible
In fact, the house on the left is less earthquake-resistant than the house on the right, but the metal fittings were weaker than those of the house on the right, so it withstood the force of the earthquake because of the rocking phenomenon.
Incidentally, this experiment was conducted on the assumption that the house would collapse.
Don't even wanna imagine if for some reason earthquakes started happening in Brazil, our houses barely function as is, if a single shake happens the country would collapse in an instant.
5:50 look how realistic this little house inside of it
This is upsetting. I feel like I'm in the building that falls apart
At first I thought "alright, miniature models, cool"
Then the building suddenly fell down slowly and it was actually a real-life model
Hello. I live in Adıyaman, Turkey. There was an earthquake here on February 6th. There is a lot of loss of life. I hope financial support will come.
Blame Erdogan and vote him out this May if you wan't any change
Woah I now realise that these houses are built to real life scale😮
Cool 👍
I thought so too.
Wow how much on the scale these Earthquake simulations measure
great
Trying to figure out if its model houses or real size ones
So what I gather from this is, either go outside or go upstairs.
I would say downstairs and run like hell.
Imagine someone is inside of the houses , that'll be scary
Or dead. Please make sure and support the channel by subscribing.
@@bayarearetrofit5814 okay
Thank you. Please help the channel by subscribing
@@bayarearetrofit5814 Okayy
5:47 Guys Can anyone find a video of table shaking earthquake test in this minute of the video?
It’s not the earthquake that kills and injures, it’s the buildings many of which are fairly new and ‘earthquake proof’. Corruption and greed make builders take short cuts but the designers are under unfair pressure to build higher bigger for less money
Wow the floor needs to chill brooooooooooooo!
Plywood is better than the typical chipboard garbage they sheet houses with.
Garage door opening sure makes a huge weak area in the corner.
Even if the house doesnt fall down it's greatly weakened and out of plumb and likely would have to be torn down anyway
How do they make buildings earthquake proof in japan? If you put downward tension on a structure, would that preserve it? Karra just gave me that one....
My apartment was recently shaken in the Sparta, N.C. 5.1 earthquake. At my location the shaking lasted at least a minute and a half, violently for 45 seconds. The lights now flicker constantly in the unit and the unit below me. Initially, several nails protruded from the top of random walls near the ceiling. Over time nails are protruding around most of walls near the ceiling and down some sections, they are also beginning to come through the ceiling plaster. Cracks are developing in the drywall, groans and very loud popping happens several times a day, primarily in the bathroom, it’s loud enough to wake you up. There is also a thumping noise in the living wall, and floors creak without stepping on them. The earthquake happened months ago, but the damage is progressing, is this a cause for concern?
Is it a cause of concern? YES! If you hear creaking, popping thumping MONTHS after the earthquake, and if you still experience poweroutages it IS a concern! A big one! Get a specialist to look at your building
@@--2 Thank you very much! ♥️🕊
No, don't worry about it. It sounds like the building is just getting used to being shaken up previously.
@@infocook4854, I don’t think so… this is MONTHS after the earthquake, and this is after a relativily small one. If nails protrude, there are thumping/popping sounds and cracks are forming, the building prob shifted during the earthquake, and is under stress which should be chekced on just to be sure. I live in a earthquake prone area where all buildings are supposed to withstand up to 8m earthquakes, so I find it concerning that a building is showing so many stress signs after just a 5m one
I’m from California. Experienced in three earthquakes. Get out of there. Sell move, and get a better built house
It would be nice to know which countries each house type is from.
Mainly Japan.
Who the hell marked the unlikes??? Anyway good video!!
I have competitors who are jealous. They don't publish anything or know anything and try and undermine those who do.
By the way, please support my channel by subscribing.
Use extra reverse v support of wood to give more support.
5:49 perfect
Turkey needs one of these 😬
Hello, very interesting video, but I have the following question. By setting aside the lethal aspect, wouldn't the cost of repairing the damage suffered be higher than rebuilding? We must not lose sight of the fact that after such destruction, the means most often find themselves almost non-existent!
Personally I'd rather my house didn't collapse with me inside it. Rebuilding can come later and is what insurance is for.
Earthquake insurance.
So the house with walls is stronger that the one without
Hi, where is this testing done? Is this in the Bay Area?
Someone said they are all in Japan. I don't know.
Why can`t houses be built on the principle of a `steady cam` on the foundations = using pistons/dampers in all directions? and use shipping containers as temporary accomodation?
That would be a fun job. Even if your hpuse withstood a strong earthquake and didnt fall, that ride would still be scary as hell. I wonder if an earthquake proof hpuse can be tornadoe resistant.
And I’m in bed, on a second story watching this video in Los Angeles. Sooooothing.