ABSTRACT
It is intended to develop a new system identification method which can identify the change of parameters. The new method developed here is called the recursive hybrid Genetic Algorithm. In the development of this new algorithm, the time history of the measurement is divided into a series of time intervals, and then the model of equivalent linear system is employed to identify the modal parameters of the system and the initial displacement and velocity for each time interval.. The new method developed here is called the recursive hybrid Genetic Algorithm. This new algorithm are applied to the identification of the two real building which are the office building of National Center for Research on Earthquake Engineering (NCREE) and the building of Taitung Fire department located in Taiwan. The parameters of these structures are identified using the response records of the structure under the attack of earthquakes of different intensities. By monitoring the variation of the identified parameters, the damage assessment of these structures is performed and the damage states of these structures are evaluated.
