ABSTRACT
In this paper, the high-order statistical moment of displacement is introduced as the damage identification index, and the high-order statistical moment is calculated by the fast virtual excitation method. Then the damage identification analysis of shear frame structure is carried out in the cases with/without white noise. based on the fourth order displacement statistical moment, the stiffness of the model is combined with the genetic optimization algorithm to identify the damage location and damage degree of the structure. the proposed method shows a high efficiency and robustness in numerical examples. Finally, the proposed method is applied on a shearing frame of a shaking table experiment under white noise. It is found that the proposed method can also accurately identify the damage location and extent degree of the frame structure, which can be demonstrated by the experimental data and applicable on practical shear-type structures.
