Comments by "Robert A" (@RobertAmer) on "356m tall skyscraper reopened, shaking violently again on June 9" video.

Lets cut all the crap, including the rubbish about feng shui. This building is now over 25 years old, has steel columns filled with concrete and is not fitted with dampers. It is likely that small cracks have occurred inside the columns, which cause kinetic energy transference which are not absorbed by dampers. When this building was erected it was done at express rate, and the concrete inside the steel columns is now likely to move. Concrete and steel have different expansion and contraction rates when heated and/or cooled, thus there will be minute separations occurring inside the columns, and even the possibility of minute cracks. If this movement inside a column occurs very close to the ground, the effect of the kinetic energy at very high levels will be much more strongly felt, as there is no absorption of this energy. It should still be safe.
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