Integrated vibration control and health monitoring of building structures using semi-active friction dampers : part II - numerical investigation

摘要

An integrated procedure for model updating, vibration control and damage detection of a building structure using semi-active friction dampers has been presented in part I of this paper. The feasibility of the proposed procedure and the practical issues of its application are investigated numerically in this accompanying paper. The model updating scheme is first applied to an example building to identify its structural parameters. The effects of measurement noise, incomplete measurement information and damper stiffness on the quality of model updating are evaluated. The control performance of seismic response of the example building using the semi-active friction dampers manipulated by a local feedback control strategy with a Kalman filter is then assessed through comparisons with the same local feedback control strategy but without the Kalman filter and with a global feedback control strategy. The optimum damper stiffness suitable for both model updating and vibration control is also determined. Finally, two damage scenarios are presented to ascertain the accuracy of the damage detection scheme for different damage severities and locations with and without noise contamination. The additional comparison is made between the proposed damage detection scheme and the traditional sensitivity approach. The numerical results demonstrate the feasibility of the proposed integrated procedure.