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Tae Bo Workout Sent Skyscraper Shaking
MiniMike writes "According to CNN: 'Seventeen people performing a vigorous Tae Bo workout caused tremors that forced the evacuation of a South Korean skyscraper earlier this month, the building's owners say.
Scientists recreated the event in the 12th floor gym, according to a report in the Korea Times.' I don't know which is scarier, that they made such a flimsy skyscraper, or the sight of 17 scientists doing a Tae Bo workout. Hopefully they're better at it than the scientists I've seen in the gym."
Heh, they accidentally hit a resonance frequency?
After (admittedly) doing tonnes of calculations, the actual fix is typically very simple adding weights or some other form of damper to correct parts of the building).
please have video. This has got to be funny!
Korea's got a dramatic history with such things. 500 people died in that one.
When information is power, privacy is freedom.
insult the scientists that are trying to determine the problem and get data.. scientist don't work out well in the gym! kek., where better then they are. kek
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The Kruger Dunning explains most post on
The doom of resonant frequency.
Fuck systemd. Fuck Redhat. Fuck Soylent, too. Wait, scratch the last one.
Apparently we have learned nothing from Galloping Gertie?
No wait, some of us have. Mythbusters proved that properly designed modern bridges aren't anywhere near as susceptible to forced resonance anymore.
This Space Intentionally Left Blank
That power of Tae Bo!
kekekekeke
Interesting. If this is true they were probably moving in sync, and accidentally matched the resonant frequency of the building. It was a similar problem with that wobbly bridge that collapsed shortly after completion, but that was resonating from the wind. Whats interesting is that they managed to do this from the 12th floor of the building. It must not have very good resonant properties. Luckily wind rarely buffets or changes at such a quick frequency, so they are safe from that, but I would really worry about even very minor quakes.
Finished the TFA (which barely qualifies as an article). The result was harmonic resonance associated with the workout. Flimsy skyscraper my eye. Although buildings should be built to dampen these sorts of effects, it's not like it was a rickety tower about to fall on a small Italian town. Only thing that surprised me was that CNN actually had the information regarding the cause in their coverage. Of course it was in the form of direct quotes so take it as you will.
All you Tae Bo haters get the heck out of the room! This is proof positive that Tae Bo practitioners can destroy buildings! AARRGH!
Were these 17 people?
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Chuck Norris once did a kung-fu workout, on January 17th, 1994 in Northridge, California.
http://xkcd.com/228/
Scientists are bad at the gym? Is that a stereotype? Never heard that before. I know some marathon-running, rock-climbing scientists that would probably take issue with that.
"Here Lies Philip J. Fry, named for his uncle, to carry on his spirit"
The article concerns a workout which happened to hit the resonant frequency of the structure, which was properly designed. The failure you linked to had to do with criminal negligence by the owners ignoring repeated engineering and construction firms who refused to accept design changes driven by greed (and were fired for it), completely repurposed building usage leading to gross overloading of the structure's strength, and then completely incompetent handling of obvious signs of structural failure (failure to immediately evacuate the building.) For fuck's sakes, they removed columns for escalators, then cut into the remaining columns, then ADDED A STORY WITH POURED CONCRETE FLOORS *and* an air conditioning unit the building wasn't designed for. And then when the building started to fail, they just blocked off areas to hide it from customers because they didn't want to lose sales revenue.
Please help metamoderate.
That's why Chuck Norris and Jackie Chan don't usually workout together.
Coder's Stone: The programming language quick ref for iPad
Skyscrapers are designed to sway with rather than resist earthquakes.
Have they questioned this guy yet?
The eternal struggle of good vs. evil begins within one's self.
...with meat bodies?!??!!
Did you read the article? The resonance could only be felt on one very narrow range of floors. The whole building wasn't shaking, which is what tuned-mass and active dampers are designed for. They're for countering earthquakes, wind-induced vibrations, etc.
Please help metamoderate.
Billy Blanks is no longer allowed in South Korea.
Chuck Norris wears Jack Bauer pajamas.
http://www.youtube.com/watch?v=PHUw7nS8Q7w&fmt=18
Have gnu, will travel.
I just want to buy the car they make!
There are many building codes in S. Korea and local officials want bribes to look the other way. Even if you build by the letter, they will find some technicality or make one up to delay the construction. Any delay costs lot of money so most developers just pay the bribe.
Korea is a lovely country but sadly it is infected with corruption like most of Asia.
P.S. I know this because my in-law is one of those corrupt official in S. Korea. She wasn't even embarrassed about it either.
>>Tesla's earthquake machine was an exercise routine?
He had The Power.
Somebody around here doesn't like Tesla, almost every Tesla related post has been down-modded.
This is what probably brought down WTC7, you know. It's not a joking matter.
And myth busters claims to have busted that one, too, according to your link.
I guess the mythbusters crew have never spent much time in buildings from the 19th century.
(At least, I would hope it was negligence. But reading what mythbusters has said about vibrating buildings, they've just lost a lot of what cred they had with me.)
Computer memory is just fancy paper, CPUs just fancy pens with fancy erasers; the 'net is just a fancy backyard fence.
Not the first time such things have happened:
http://www.smh.com.au/lifestyle/wellbeing/zumba-class-has-office-all-shook-up-20110224-1b73p.html
A Zumba class in a building only a block away from where I work caused noticeable movement in that building, so much so that some people were afraid for their safety. Of course, the building was up to code and engineers reported that nothing was wrong, but still, interesting...
The building just oscillates around him.
all about how flimsy you can make your building that 17 small 150 pound males running around could topple that skyscraper down....serious architectural deficiency there!
I work in Houston, in the Wells Fargo Plaza tower. Every afternoon, I can feel the tower shake from the exercise going on down on the 14th floor. I wonder how many it would take to get this tower resonating enough to evacuate it. I often can hear the tower creaking with high winds.