Dynamic response and control of hysteretic structures

In the paper one considers a multi-storey shear frame which exhibits an elastic-plastic behaviour under a seismic-type action. General considerations are carried out on the advantage of adopting a rule for controlling dynamic oscillations which includes the plastic pattern. The performance of two different feedbacks is tested, showing the simply derivative feedback the most suitable for structures entering the plastic domain, either when controlling each degree of freedom or when dealing with a reduced number of actuating devices. (C) 2003 Elsevier B.V. All rights reserved.