Damage Identification of Wooden Beams Based on Strain Modal Curvature Differences
This paper presents a damage identification approach based on the difference in curvature of strain modes to identify the defects of the cross-section of wooden beams.First,modal analysis was performed to establish the finite element models of both intact and damaged wooden beams using ABAQUS.Next,the damage identification indicators of strain mode and strain mode curvature difference were used to locate and identify the damage of the wooden beams,and the damage degree of the wooden beams was estimated by fitting the relationship between strain mode curvature difference and damage degree.Lastly,the wooden beams test was used to confirm the validity of the indexes.The results reveal that:the strain mode damage identification index is unsatisfactory for damage localization of wooden beams;the strain mode curvature difference index has strong sensitivity and can properly identify different damage and degrees locations of wooden beams.
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