How Taiwan's Tallest Skyscraper Was Protected During An Earthquake by a Steel Ball

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Taiwan's highest tower is equipped with an innovative system that protects it from powerful winds and earthquakes.

Taiwan Taipei


The "tuned mass damper" has a 40% reduction in the building's movement.

Taipei 101, Taiwan's tallest tower, escaped with only minor damage from a recent 7.4-magnitude earthquake. CNN claims that its creative design, which incorporates a massive pendulum, is partially responsible for this. The building's central giant yellow pendulum served as a shock absorber.

Called "Damper Baby," the pendulum is a tuned mass damper situated at the center of the structure, a 660-metric-ton steel sphere suspended over 1,000 feet above the ground. According to the news outlet, the sphere sways in response to the movement of the building during an earthquake or severe winds, lessening its sway by as much as 40%.
The 41 steel layers that make up the pendulum are suspended between the 87th and 92nd levels. It swings within a restriction of 59 inches to prevent excessive movement, and its diameter is almost eighteen feet.

Once the tallest structure in the world, Taipei 101 is now a famous skyscraper in Taiwan. The architecture of the building is an example of how creative engineering may be used to protect buildings in seismically active areas.

What is the ball that dampens wind?

The wind damping ball is known by its technical term, Tuned Mass Damper (TMD). A passive system designed specifically for a building is called a TMD. Its primary goals are to lessen wind-related swaying and improve comfort for those who work in such a tall structure. While traditional disguised dampening devices are unseen, the Taipei 101 TMD is aesthetically pleasing in addition to being practical. Viewers of the observation deck may see how the damping system functions as a whole.

What is the operation of the Tuned Mass Damper?

The spherical damper that was installed in Taipei 101 oscillates back and forth in response to typhoons and earthquakes, which frequently occur on the island, according to the website for the building. According to Taipei 101, this action absorbs the power of any vigorous swinging. The damper's engineers assert that it can lower interior occupant discomfort by as much as 40% by reducing the movement of the building.

The pagoda-shaped building barely moved during the earthquake, as shown in closed-circuit TV footage of Taipei's skyline. In the meantime, there is noticeable shaking captured by a security camera mounted on a different building.

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