EACS 2016 Paper No. 173
In Japan, the application of energy-dissipating devices in high-rise buildings has increased significantly since the 1990s. Many recently constructed high-rise buildings containing energy dissipaters enclose large spaces with high ceilings, such as concert halls and theaters, where there is concern that the efficacy of the energy dissipaters incorporated into such high-ceiling frames might be compromised because of long and thereby flexible supporting members. A viable way to somewhat exploit the flexibility of a damper-supporting member in a high-ceilinged frame is to employ a tuned viscous mass damper (TVMD), which consists of an apparent mass produced by rotary inertia and a viscous element, as well as a flexible spring, resulting in an energy-dissipating system similar to a conventional tuned mass damper (TMD). When the supplemental vibration system consisting of the apparent mass and the flexible supporting spring is properly tuned to the primary structure, the deformation of the viscous element is amplified, whereas the deformation of the supporting member results in decreased deformation of the damping element and thus to decreased energy dissipation in conventional devices. An analytical example illustrates the efficacy of a TVMD incorporated into a high-ceilinged frame.
