Reduced order control for wind-induced vibrations of tall buildings

The design of a structural control system for a tall building may not be easy owing to the large number of degrees of freedom involved. Obviously, it is much easier to design a structural control system for the reduced-order system than for the full-order system. Model reduction is thus useful when control systems are implemented in civil engineering structures. A reduced-order modelling technology for vibration control of wind-excited tall buildings is presented and its performance is studied. The important issues associated with wind-induced vibrations, model condensations and reduced-order control are addressed. Finally, a numerical example, a tall building with an active tuned mass damper or a passive tuned mass damper, is given to show the efficiency of the reduced-order control technique. Copyright © 2003 John Wiley & Sons, Ltd.