In action: a skyscraper’s amazing 728-ton stabilising ball

deputy-dog ^ | 6/22/08

[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"/

[JZelle]

Do not taunt 728-ton stabilising ball.

[steve86]

It would be best if it were a dimensionless point, or barring that, the smallest (densest) possible sphere. Black Hole 101.

[CowboyJay]

“Where do they keep the “Ball of Confusion?”

It’s over by the Ball of Confucius

Next question?

[reagan_fanatic]

It must have been quite a chore rolling that ball all the way up to the top. I wonder how many breaks they took.

[Joya]

Thanks.

[gitmo]

I think a black hole as a damper would make an earthquake sort of meaningless.