Abstrakt

Research on damage identification of tower structure based on analysis of key component

Yang Zhaoshan, Cheng Hua, Wang Zhonggang

In order to enhance the pertinence of the damage identification, a damage identification of tower structure based on the analysis of key component is proposed, since it is difficult and less significant to carry out a comprehensive damage identification for all components of the tower structure because of numerous tower structure components, most of which is the secondary member, and only a few key components have a big damage probability and severe impact of damage on the structure. Firstly, the components that the main failure modes should experience when the structure is intact and under different initial damage by searching for main failure modes of the tower structure through the global branch-and-bound method are found, which are ports leading to invalidation of the structure and the key components of the tower structure system. Then, based on these key components, by accelerating response signals with fluctuating winds, WVD damage identification indictor DI of time-frequency statistical characteristics is proposed, to achieve the diagnose of the damage and corresponding location of key components. Finally, the proposed method is verified by a communication tower.