The height of the Shanghai Tower is no less than 632 meters.
Despite its impressive size, the skyscraper is considered the most stable of all structures of this type in the world – supposedly no weather conditions can affect its balance.
This is not quite true - vibrations are present, of course, but they are not felt. Let's try to figure out together why such grandiose structures do not fall.
The answer lies in the state-of-the-art damper system that was used during the construction of the building.
The damper reduces the amplitude of vibrations caused by the wind and also reduces the speed that the upper part of the tower gains during vibrations.
In simple terms, a standard damper looks like a set of pendulums (flexibly connected steel plates) that, if the building deviates, “push” it in the other direction.
Of course, a conventional damper was not enough for the Shanghai Tower, so engineers had to resort to a more original technology.
The heaviest load was placed on the upper floors and connected to a powerful electromagnet, thus creating the first induction damper.
Its center is a copper plate with an area of 100 square meters. On it are placed 125 powerful magnets. The whole structure is under a suspended classic damper.
When the building is displaced, a 1,000-ton steel weight moves over the magnets, causing an electric current to flow through the plate. This creates a magnetic field that acts as a damper.
The architects who worked on the Shanghai Tower claim that in 99.9% of cases, people do not feel any vibrations, even in the summer, when the region is often hit by typhoons.
Earlier we talked about the cold water swimming record .
