Study on practical application of damping control ceiling

In Japan, including the Great East Japan Earthquake, the fall of ceiling caused by earthquake has repeatedly occurred every time. In the year of 2013, "ceiling notice" was enforced. As a countermeasure, the technology of setting up diagonal members and improving the stiffness and bearing strength of seismic ceiling has become the mainstream. However, the ceiling notice is supposed to be a medium earthquake level, and even larger inputs can be considered at the large earthquake encountered in the future. As a result, it is necessary to increase the proof stress of the components in order to respond to earthquakes and resonance with buildings with earthquake-resistant ceilings. Therefore, in this research, we aim to add damping to suspended ceilings and to prevent damage and fall of suspended ceilings from large earthquakes. The damping control ceiling system we proposed allows a certain amount of deformation not only during the mid-earthquake targeted by the current ceiling notification but also during severe input during a large earthquake, and can suppress the acceleration response of the ceiling surface. In addition, considering the application to an actual building, we will conduct vibration experiments using the placement method, damper installation angle, and vibrating direction as parameters to confirm the usefulness of the damping ceiling system. In this experiment, it was confirmed that the acceleration response was reduced in the entire region including the resonance region by installing the damping control ceiling system. It was confirmed that the difference in additional damping was confirmed by the damper installation angle, and that the difference in the arrangement method and vibrating direction had a small effect on the damping control ceiling system. As a result, it was confirmed that the response of the ceiling surface can be reduced by the damping control ceiling system even under various conditions.