Shanghai Tower's 1,000-tonne tuned mass damper was seen swaying as Typhoon Bavi brought strong winds to the city. Installed on the tower's 125th floor and suspended by 12 steel cables, the damper moves in the opposite direction of the building's motion to reduce wind-induced sway and improve stability during extreme weather. #China #Shanghai #ShanghaiTower #TyphoonBavi #Typhoon #Architecture #Skyscraper