Mitigation of Wind-Induced Vibration with Liquid Column Vibration Absorber
Increasing heights of tall buildings often require supplementary damping system for occupant comfort in windy condition. This paper presents a liquid column vibration absorber (LCVA) installed in a 64-story building, which is the highest residential building with flat plate structural system in Korea, for mitigation of wind-induced motion. LCVA is a special type of secondary mass-type dampers relying on the motion of a column of liquid in a U-shaped container to counteract the forces acting on the structure. Since it has different dimensions for vertical and horizontal portions of container, it has benefits of easy tuning and wide natural frequency range. To evaluate the control performance of LCVA, an experiment using 1/20 scaled model is performed. The test structure is excited using a sinusoidal signal ranging 0.1 ~ 3.0Hz with 5.5mm displacement, and acceleration and displacement of the structure, water height, and shear force are measured. Experiment results indicate that the LCVA increase the energy dissipation capacity of the building significantly.
Pietro VINCENZINI and Fabio CASCIATI
H. J. Kim et al., "Mitigation of Wind-Induced Vibration with Liquid Column Vibration Absorber", Advances in Science and Technology, Vol. 56, pp. 259-264, 2008