Abstract
Structural damage identification can realize pre-warning, identify the location of the damage and improve reliability and safety of the structure. In this paper, at first, the damage identification of a simple steel framework model was presented by the modal curvature method, the modal flexibility method and so on. Then, the influences of the recognition effect and damage degree were analyzed. At last, the modal curvature difference (MCD) method and the modal flexibility curvature difference (MFCD) method, as better recognition methods, were introduced into an actual transmission tower model, and damage identification on main stressed ones of structure were valued under different conditions. The improved adaptive weighted fusion (IAWF) method was proposed. Recognition results of the MCD method and the MFCD method were processed by the IAWF method. Simulation results showed that IAWF method was more precise than any other methods. The information fusion technology is applied to fault monitoring, pre-warning and diagnosis system, which can obtain the estimation of structure under operating state more accurately and improve the confidence degree of diagnosis.
