en.Wedoany.com Reported - Located in Taipei City, Taiwan Province, China, the Taipei 101 tower features a 660-metric-ton Tuned Mass Damper (TMD), currently on public display at the observation deck between the 88th and 92nd floors. This damper is the world's largest and heaviest passive tuned mass damper, designed to reduce swaying in super-tall buildings caused by strong winds and earthquakes. According to the designers, the system can reduce the building's sway amplitude by up to 40%.
Completed in 2004, Taipei 101 stands 508 meters tall and was once the world's tallest building. Located in the Pacific Ring of Fire and affected by typhoons every summer, earthquake and wind resistance were core challenges in its design. To address this, engineers suspended a giant steel ball with a diameter of 5.5 meters and a weight of 660 tons from 12-meter-long steel cables between the 87th and 92nd floors. This steel ball is welded from 41 layers of circular steel plates, each 125 millimeters thick, with varying diameters. Below it, eight sets of hydraulic viscous dampers connect it to the floor slabs, forming a single-pendulum vibration reduction system.
Its working principle is based on mass inertia: when the building sways due to wind pressure or seismic forces, the suspended giant steel ball moves in the opposite direction due to inertia. By stretching or compressing the hydraulic dampers, it converts the building's vibrational energy into heat, effectively suppressing the sway. The system was designed by Canadian engineering firm Motioneering and built by A+H Custom Company. According to the manufacturer, A+H Tuned Mass Dampers, the damper's maximum design swing amplitude is 1.5 meters, but this limit has never been reached during actual typhoons or earthquakes to date.
The tuned mass damper at Taipei 101 is the first such system in the world open to public viewing. Visitors can see the giant golden ball up close at the observation decks on the 88th and 89th floors. The observation deck features interactive exhibits and plays footage of the damper in action during major earthquakes and typhoons, presenting complex structural engineering principles to the public in an intuitive way. This design not only showcases outstanding engineering achievements but also enhances public awareness and interest in science and engineering by transparently displaying disaster prevention technology.
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