Damage identification for timber structure using curvature mode and wavelet transform

Abstract

Aiming at the limitations of the curvature mode index for structural small damage identification, a new method of structural damage identification based on the combination of curvature mode and wavelet transform is proposed in this paper, which has significant damage identification capability. By combining numerical simulation and experimental analysis, the applicability of the wavelet coefficient difference index to wood beams and wood frames at different damage locations and degrees is investigated. The results show that the method determines the damage location of the structure based on the sudden peak of the wavelet coefficient difference index and estimates the damage degree of the structure by fitting the relationship equation between the wavelet coefficient difference index and the damage degree.