Ability of an infrastructure asset or system to perform the desired function based on specified requirements over time without interruption or degradation.


1. See also "Redundancy".


Modified from ISO 19904-1:2019(en), 3.40, Accessed from ISO

Reliability of Taipei 101’s tuned mass damper

Taipei 101, also known as the Taipei Financial Center, is a landmark skyscraper located in Taipei, Taiwan. The building was completed in 2004 and at 508m, it is one of the tallest buildings in the world. Inside the skyscraper is the world’s largest and heaviest tuned mass damper. The 660 metric tonne steel sphere is suspended by eight cables in the upper floors. It is an engineering marvel meant to limit the vibrations of the building by essentially acting as a huge pendulum. Since its completion, Taipei 101 has faced several earthquakes, including the 7.1 magnitude earthquake that struck Taiwan in 2006, and many others of varying magnitudes. The building has performed well during these earthquakes, and its structure has remained intact and operational, demonstrating its reliability.