Taipei 101

Taipei 101 is a 508-meter skyscraper in Taipei, Taiwan, completed in 2004. Its tiered form and tuned mass damper help it withstand strong winds and earthquakes.

Tuned mass damper: A large movable mass that reduces a structure’s motion by oscillating against its sway. Taipei 101’s 660-tonne steel sphere is an unusually visible example of this vibration-control device.
Structural dynamics: The study of how structures move and respond to time-varying forces. The damper is designed around the tower’s dynamic response to wind and seismic motion.
C.Y. Lee: A Taiwanese architect known for designing major buildings that combine contemporary forms with Chinese cultural references. Lee led the architectural design of Taipei 101.
Tallest building in the world: A title awarded to the building that meets a specified height criterion and holds the current or historical record. Taipei 101 held the title from its opening until Burj Khalifa surpassed it in 2010.
Outrigger system: A structural system that links a building’s central core to exterior columns with stiff horizontal trusses. Outriggers help the tower resist lateral forces from wind and earthquakes.
Wind engineering: The study of wind forces on structures and ways to control their effects. Wind-induced sway shaped the tower’s aerodynamic and structural design.
Taipei Financial Center Corporation: The company established to develop and operate the Taipei 101 complex. The corporation commissioned and developed the landmark tower.
Burj Khalifa: An 828-meter skyscraper in Dubai completed in 2010 and the world’s tallest building by architectural height. Burj Khalifa succeeded Taipei 101 as the world’s tallest building.
Skyscraper: A tall, multi-story building whose height depends on a structural frame rather than load-bearing walls. Taipei 101 belongs to the building type defined by extreme height and engineered structural systems.
Earthquake engineering: The engineering discipline that designs structures to limit damage and protect life during earthquakes. Taipei 101’s frame was designed for the region’s significant seismic hazard.

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