Comments by "SmallSpoonBrigade" (@SmallSpoonBrigade) on "How This Tower Barely Touches the Ground" video.

  1.  @usmh  TBH, I suspect that the reservoirs being used in the model might have been a bit misleading. I'm not sure how this particular building's system is set up, but they're often times a pair of reservoirs connected with a large pipe, so that water can slosh between the two sides. The water during the sloshing heats up and the heat is typically radiated out to remove energy from the system and give the building a natural tendency to stop vibrating when the wind dies down. As far as the water goes, the water would gain rightward momentum, but it would l do so after the building starts to move in the opposite direction as the water gets its momentum from the building and conservation of momentum requires that any momentum gain by the water come from the building. I assume that's what you're getting at.
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  2.  @johndododoe1411  Presumably the same thing that anchors most buildings like this, a massive block of concrete or bed rock. The damper is presumably necessary in part because of the restrictions on the size of the base. Keep in mind that a building of this height wouldn't normally require the damping. It's just not big enough for people to get motion sick, or for the freight elevators to have problem. I worked security in two highrises that were taller than this and neither had this kind of damping. It just wasn't necessary.
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  3. Yes and no, at the wide angle it's rather simple, but there are probably hundreds of thousands of members that had to be modeled to ensure that the stresses would flow the way that the engineers intended to and that there was enough margin for safety, particularly in the direction where it's so narrow at the bottom. It's one of the fascinating things about projects like this. The basic idea is rather simple, but proving that you've got the materials to actually do it with sufficient safety is another matter. After all, people would get cranky if you built the building as a test and it just fell over like those ones in Kobe did.
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