DAMAGE IDENTIFICATION THROUGH REGULARIZATION METHOD - II - APPLICATIONS

The methodology and theoretical development of damage identification t hrough the regularization method are described. Numerical studies of a two-degree-of-freedom and a 10-degree-of-freedom shear-beam-type stru cture and experimental correlation with a three-story model structure are reported in this paper. The complete time history of the underlyin g damage process is satisfactorily estimated from noisy measurements ( with noise level as high as 20-40%). Measurements can be displacements , velocities, accelerations or any combination thereof subject to obse rvability conditions. Noise in input measurements is handled by treati ng input as an augmented state. Based on the identified time histories , damage model and its associated parameters are estimated using corre lation and least-square tests. In the three-story experimental study, damage simulated through an actively controlled tendon system is succe ssfully identified from displacement measurements.