Study On Structural Vibration Control Of The Rectangle Tuned Liquid Damper

With the increasing of the height and aspect ratio of the tall buildings and the application of the lightweight and high-strength material in civil engineering, the structural stiffness and damping are decreasing. In this way, the structure will be very sensitive to the strong load such as wind, wave, earthquake, etc, and will most likely result in making people feel uncomfortable or structure collapsing because of action of such load. The traditional earthquake-resistance method is improving the intensity and stiffness of structure, which will be very uneconomical and probably unsafe. Then structure vibration control arises at this moment. Structure vibration control is always installing some structural control devices in structure. When the structure is vibrating, the control devices exert a group of control force to the structure actively or passively, and the vibratory responses are reduced. Depend on whether needing external energy or not, it can be divided into active control and passive control. The Tuned Liquid Damping that presented in this text is one of the passive control devices. It is a rigid tank that using the hydrodynamic pressure of the tank to reduce the vibratory response. TLD has the characteristic of low fabrication costs, convenient installation, simple maintenance; it can be used in water tank, and have an extensive application prospect. This text introduces the state of the art and engineering application of TLD at first, proposes the research contents of this text and research approach on the basis of understanding in an all-round way the current research situation of TLD. Then the text formulates the governing equation of the movement of the water in the TLD based on the basic principle of the vibration suppression of the structure with shallow water TLD presented by Fujino. In order to verify the exactness of the simulation of above-mentioned methods of TLD, the text performs experimental study to the structure of the building. At last a computing example is presented for a tall structure using Tuned Liquid Damper (TLD) to reduce seismic response. The results show, for tall structure, the TLD system can reduce the seismic response efficiently and with the increase of the mass of water in TLD, the seismic responses of the structure-TLD are reduced obviously too.