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In action: a skyscraper’s amazing 728-ton stabilising ball
deputy-dog ^ | 6/22/08

Posted on 06/22/2008 10:44:14 AM PDT by LibWhacker

The enormous steel ball you see in the photos (and the incredible video below) is the world’s largest ‘tuned mass damper’ and sits near the top of the world’s largest completed skyscraper on earth, taipei 101 in taiwan. the idea behind a tuned mass damper is quite simple: as a building sways (resulting from high winds, earthquakes etc), its tuned mass damper, essentially a finely tuned and ridiculously heavy pendulum, will move in opposition to the structure’s oscillations and minimise any movement. if that makes no sense, watch the crude gif below.

due to both the immense size of taipei 101 and the fact that it sits just over 600ft from a major fault line, engineers had no choice but to install one of this size at a cost of $4m. too heavy to be lifted by crane, the damper was assembled on site and hangs through 4 floors of the skyscraper. it can reduce the building’s movement by up to 40%.

image sources: 1, 2, 3 image source: wikipedia

now for an incredible video. on may 12th, as the horrendous earthquake occurred in china’s sichuan province, tremors were felt for miles, including in taipei 101. youtube user phuaalvin was in the building at the time and said that as the building started to shake, dozens of people ran to the damper to watch it in action. here’s the video he took… http://www.youtube.com/watch?v=NYSgd1XSZXc"/


TOPICS: Technical
KEYWORDS: architecture; ball; earthquake; engineering; quake; skyscraper; skyscrapers; stabilizing; taipei; taipei101; taiwan
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1 posted on 06/22/2008 10:44:15 AM PDT by LibWhacker
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To: LibWhacker

Next, The World’s Largest Matza Ball...


2 posted on 06/22/2008 10:46:36 AM PDT by Doctor Raoul (Fire the CIA and hire the Free Clinic, someone who knows how to stop leaks.)
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To: LibWhacker

“Acmhed, all we need to do is blow the supports and ball will come tumbling down!”


3 posted on 06/22/2008 10:47:09 AM PDT by Rebelbase
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To: LibWhacker

Whip it!


4 posted on 06/22/2008 10:48:51 AM PDT by umgud
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To: LibWhacker

It’s why we don’t have earthquakes in Kansas. I hear we have the world’s largest ball of twine.


5 posted on 06/22/2008 10:49:23 AM PDT by IrishCatholic (No local communist or socialist party chapter? Join the Democrats, it's the same thing.)
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To: LibWhacker

bttt


6 posted on 06/22/2008 10:50:56 AM PDT by Chuck54
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To: LibWhacker

Sure looks like the spot to aim an airliner for.
melt the cables, drop the 728 ton ball into the basement
followed by flaming jet fuel.....


7 posted on 06/22/2008 10:51:04 AM PDT by tet68 ( " We would not die in that man's company, that fears his fellowship to die with us...." Henry V.)
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To: LibWhacker

Pretty cool, but why make it as a sphere and not a cylinder?


8 posted on 06/22/2008 10:51:11 AM PDT by FastCoyote (I am intolerant of the intolerable.)
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To: LibWhacker

A 728-ton ball falling (at least) 87 stories...
sounds like a nice kinetic-energy weapon for Jihadis.


9 posted on 06/22/2008 10:52:32 AM PDT by VOA
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To: FastCoyote

A sphere gives the largest unit mass per unit volume


10 posted on 06/22/2008 10:52:56 AM PDT by bert (K.E. N.P. +12 . The Bitcons will elect a Democrat by default)
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To: IrishCatholic

I could have sworn that was in Minnesota. At least that’s what Weird Al sang about.


11 posted on 06/22/2008 10:53:50 AM PDT by Past Your Eyes (You knew the job was dangerous when you took it.)
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To: IrishCatholic

“Ball of Twine”

So, we can’t say people from Kansas have no balls


12 posted on 06/22/2008 10:54:05 AM PDT by bert (K.E. N.P. +12 . The Bitcons will elect a Democrat by default)
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To: umgud
...Whip it!...

LOL! That's the first thing I thought of too. I'm betting not too many people get that connection.

13 posted on 06/22/2008 10:55:38 AM PDT by FReepaholic (Me no bottom man. Me top man.)
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To: LibWhacker
Neat!

This interesting little book explains the physics involved for the layman:


14 posted on 06/22/2008 10:55:43 AM PDT by AnAmericanMother (Ministrix of Ye Chase, TTGC Ladies' Auxiliary (recess appointment))
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To: bert

Is that correct? I’m not a physicist, but it seems to me that an ounce of lead will take up the same volume regardless of its shape. Wasn’t that what Archimedes did his streaking routine about?


15 posted on 06/22/2008 10:57:03 AM PDT by gitmo (From now on, ending a sentence with a preposition is something up with which I will not put.)
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Comment #16 Removed by Moderator

To: LibWhacker

the world’s largest completed skyscraper on earth, taipei 101 in taiwan.

The Burj Dubai overtook Taipei 101 last July...and it's not finished yet.
17 posted on 06/22/2008 10:58:53 AM PDT by G8 Diplomat
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To: gitmo

Yes but the sphere has the smallest surface area for the volume

You are correct a cc of lead is a cc of lead.


18 posted on 06/22/2008 11:00:26 AM PDT by bert (K.E. N.P. +12 . The Bitcons will elect a Democrat by default)
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Comment #19 Removed by Moderator

To: LibWhacker
as the building started to shake, dozens of people ran to the damper to watch it in action

Amazing.

20 posted on 06/22/2008 11:01:57 AM PDT by Fido969 ("The hardest thing in the world to understand is income tax." - Albert Einstein)
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To: LibWhacker
Saw something about this on the tube recently.Erecting a building that tall in an area that experiences such devastating earthquakes and typhoons sounds pretty crazy to me.
21 posted on 06/22/2008 11:05:51 AM PDT by Gay State Conservative (The problem with the rat race is,even if you win you're still a rat.)
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To: LibWhacker

22 posted on 06/22/2008 11:07:42 AM PDT by Extremely Extreme Extremist (BARACK OBAMA WILL SAVE US! HE HAS RISEN!!)
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To: AnAmericanMother

And of course, the opposite:

Why Buildings Stand Up: The Strength of Architecture (Paperback)
by Mario Salvadori (Author)

There might be another book that I bought a while ago on the same kind of things called “Why buildings DONT fall down” I can’t remember the exact title.

I bought it because I din’t understand why they DIDN’T fall down.

After having been through 2 major earthquakes when I lived in California, I don’t trust much of anything structurally.

I know that if we have a big one here in Texas, a lot of freeways and overpasses standing on spindly little one legged suppports are going to hit the dirt.


23 posted on 06/22/2008 11:08:25 AM PDT by garyhope (It's World War IV, right here, right now, courtesy of Islam. TWP VRWC)
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To: LibWhacker

Let’s HOPE and PRAY that terrorist’s don’t cut the cable supporting that enormous weight, letting it crash through floor after floor, till it finally stopped somewhere in the basement! It might be worse that 9/11!


24 posted on 06/22/2008 11:09:27 AM PDT by 2harddrive (...House a TOTAL Loss.....)
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To: FReepaholic

It’s Devolution in action!


25 posted on 06/22/2008 11:12:25 AM PDT by Dr. Bogus Pachysandra ("Don't touch that thing")
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To: 2harddrive
It looks like it's sitting on supports probably filled with gas. I don't think it could just fall. It also helps explain my first thought; how are they going to change the cables when they rust?


26 posted on 06/22/2008 11:13:21 AM PDT by raybbr (You think it's bad now - wait till the anchor babies start to vote!)
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To: LibWhacker

Punk rock is prohibited in the vicinity of the damper.


27 posted on 06/22/2008 11:13:48 AM PDT by TigersEye (Berlin 1936. Olympics for murdering regimes. Beijing 2008.)
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To: FReepaholic
LOL! That's the first thing I thought of too. I'm betting not too many people get that connection.

You're dating yourself.

28 posted on 06/22/2008 11:15:34 AM PDT by umgud
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To: LibWhacker

Excuse my scaredy cat wussiness, but if I’m going to be that high off of the ground, I want to be in an airplane.


29 posted on 06/22/2008 11:15:38 AM PDT by garyhope (It's World War IV, right here, right now, courtesy of Islam. TWP VRWC)
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To: bert

I’ll agree with surface area, but not volume. Thanks.


30 posted on 06/22/2008 11:16:12 AM PDT by gitmo (From now on, ending a sentence with a preposition is something up with which I will not put.)
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To: Dr. Bogus Pachysandra

Devo is prohibited too. But I think that’s a China-wide ban not just this building. ;^)


31 posted on 06/22/2008 11:16:56 AM PDT by TigersEye (Berlin 1936. Olympics for murdering regimes. Beijing 2008.)
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To: umgud; FReepaholic

OK. Help the slow. i don’t get the devo connection?


32 posted on 06/22/2008 11:19:19 AM PDT by sam_paine (X .................................)
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To: umgud

33 posted on 06/22/2008 11:21:13 AM PDT by FReepaholic (Me no bottom man. Me top man.)
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To: sam_paine

See #33.


34 posted on 06/22/2008 11:23:32 AM PDT by FReepaholic (Me no bottom man. Me top man.)
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To: bert

“A sphere gives the largest unit mass per unit volume”

So the shape changes the density of the material? Amazing.


35 posted on 06/22/2008 11:24:01 AM PDT by Born to Conserve
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To: bert; Cagey; Larry Lucido; MotleyGirl70

“A sphere gives the largest unit mass per unit volume”

The theory behind the Kramerica oil sphere.


36 posted on 06/22/2008 11:25:21 AM PDT by Rebelbase
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To: LibWhacker

Wonder what the natural frequency is . . . and if you pump it in, what happens, ball or no.


37 posted on 06/22/2008 11:26:17 AM PDT by No Truce With Kings (The opinions expressed are mine! Mine! MINE! All Mine!)
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To: sam_paine

38 posted on 06/22/2008 11:26:57 AM PDT by Mike Fieschko (et numquam abrogatam)
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To: FReepaholic

Well duh on me. The picture of the stacked sphere hadn’t loaded yet or I’da figured that one out!


39 posted on 06/22/2008 11:27:03 AM PDT by sam_paine (X .................................)
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To: sam_paine

"Whip it. Whip it into shape. Not!

40 posted on 06/22/2008 11:27:14 AM PDT by TigersEye (Berlin 1936. Olympics for murdering regimes. Beijing 2008.)
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To: Gay State Conservative

Crazy?

Ego, pride, arrogance, one-ups-man-ship . . .

Chinese culture is rife with such . . . as is American culture.

Then there’s the globalist puppet masters . . . . arrogant enough to plan the deaths of all but 200 million global citizens.

Yeah, pride is always crazy . . . eventually.


41 posted on 06/22/2008 11:28:29 AM PDT by Quix (WE HAVE THE OIL NOW http://video.google.com/videoplay?docid=3340274697167011147)
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To: 2harddrive

The Chinese CAN be very good about security.


42 posted on 06/22/2008 11:29:12 AM PDT by Quix (WE HAVE THE OIL NOW http://video.google.com/videoplay?docid=3340274697167011147)
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To: Quix
Ego, pride, arrogance, one-ups-man-ship . . . Chinese culture is rife with such . . . as is American culture.

I think the Chinese have us beat. They're just getting warmed up though and we've been playing encores for decades now.

43 posted on 06/22/2008 11:31:49 AM PDT by TigersEye (Berlin 1936. Olympics for murdering regimes. Beijing 2008.)
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To: TigersEye
There is that, alright.

I certainly think they will excel at ostentatiousness.

They can flaunt it like no one I've ever seen.

44 posted on 06/22/2008 11:35:07 AM PDT by Quix (WE HAVE THE OIL NOW http://video.google.com/videoplay?docid=3340274697167011147)
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To: garyhope
That was the sequel.

Because the first book actually talks a lot about the failure points that caused famous things to fall down -- it also points out how to remedy them. It covers "Galloping Gertie" (and other bridge collapses), the Empire State Building plane incident, the KC skywalk collapse, and other less known incidents. The Nimitz Freeway collapse was discussed in detail.

If there's a big one in TX, it'll come off the New Madrid fault and it will hit here before it hits there -- and we won't be here to talk about it!

45 posted on 06/22/2008 11:36:24 AM PDT by AnAmericanMother (Ministrix of Ye Chase, TTGC Ladies' Auxiliary (recess appointment))
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To: sam_paine; FReepaholic

Whip It

http://www.youtube.com/watch?v=Xbt30UnzRWw


46 posted on 06/22/2008 11:38:07 AM PDT by umgud
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To: Quix
They can flaunt it like no one I've ever seen.

Shake it, China Baby!

Oops! I guess I shouldn't have said that on this thread.

47 posted on 06/22/2008 11:45:36 AM PDT by TigersEye (Berlin 1936. Olympics for murdering regimes. Beijing 2008.)
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To: LibWhacker

I now better understand the male anatomy...............two has to be better than one.....


48 posted on 06/22/2008 11:54:09 AM PDT by ALASKA (I feel more like I do today than I did yesterday.....)
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To: TigersEye

lol.


49 posted on 06/22/2008 11:54:29 AM PDT by Quix (WE HAVE THE OIL NOW http://video.google.com/videoplay?docid=3340274697167011147)
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To: raybbr
how are they going to change the cables when they rust? Stainless Steel
50 posted on 06/22/2008 11:55:07 AM PDT by Red_Devil 232 (VietVet - USMC All Ready On The Right? All Ready On The Left? All Ready On The Firing Line!)
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