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1 de ene. de 2014 · John Hancock Tower Two dampers were added to the 60-story John Hancock Tower in Boston to reduce the response to wind loading. The dampers are placed at opposite ends of the 58th story, 67 m apart, and move to counteract sway as well as twisting due to the shape of the building.
1 de dic. de 2020 · For instance, the John Hancock Building (241 m) in Boston, Center-Point Tower (305 m) in Sydney, the CN Tower (535 m) in Canada, and Taipei 101 Tower (504 m) in Taiwan have utilized TMDs.
16 de ene. de 2023 · The same design principles were followed in the development of the TMD for installation in the John Hancock Tower, Boston, MA (ENR 1975). In this case, however, the TMD consists of two 300-ton mass blocks. They move in phase to provide lateral response control and out-of-phase for torsional control.
resonant frequency that is of concern, and the TMD damping, which causes a phase shift in the damper response. TMDs have many applications in buildings and bridges, and have been used in well-known high-rises such as the John Hancock Tower in Boston, the Citicorp tower in New York City, and Taipei 101 in Taiwan.
19 de oct. de 2013 · One of the first applications of TMD was the 244 m 60-story John Hancock building in Boston in 1977 to reduce response to wind vibrations. It has two 300-ton TMDs each consisting of a 5.2 m×5.2 m square and 1-m deep lead-filled steel box riding on a 9 m long steel plate.
Abstract. A review of representative research on tuned massed dampers (TMD) reported in journals in recent years is presented. TMDs are divided into four categories: con-ventional TMDs, pendulum TMDs (PTMDs), bi-directional TMDs (BTMDs), and tuned liquid column dampers (TL-CDs).
The tuned mass damper (TMD) technology, which was developed on the basis of a TMD system proposed by Frahm (1911), is one of the most promising vibration ab-sorption methods to mitigate and control unwanted vibra-tion.
