The Austonian is the same way. It has 60 "floors" - but only 56 of them are occupied. The others are for mechanical stuff. The Austonian also has a slosh tank/damper tank in the crown.
These buildings literally have a large concrete tank at their top filled with water that offsets the lateral movements caused by the wind. We don't really have earthquakes here, otherwise, they'd be useful in that, too.
Another method that some buildings use is a "tuned mass damper" - it's basically a giant pendulum that makes slight movements to offset the building's movements in an earthquake.
Taipei 101, a 1,667 foot tower in Taipei uses one.
http://www.amusingplanet.com/2014/08...of-taipei.html
This is a video someone took 2008 of the damper in Taipei 101 in Taipei, Taiwan during the Sichuan earthquake in China.
• Video Link• Video Link
The building was also damaged during construction during an earthquake.
• Video Link