The basic principle of Proper Orthogonal Decomposition(POD)was introduced,and the application of POD in bridge structural damage identification was discussed.A damage identification method for bridge structure based on dynamic response data features was proposed.The identification method is based on POD technology to perform Proper Orthogonal Decomposition of the displacement Snapshot Matrix(Snapshot Matrix)collected at different positions and different times of the bridge structure to obtain the Proper Orthogonal Modes(POMs)of the structure,and then construct the damage index which can identify the damage location and severity of the structure,and realize the multi-condition identification of bridge structure damage.Taking the Huanghuagou Bridge in Baoding as an example,the effectiveness of the method was verified through numerical simulation experiments.The results show that POD can extract the essential characteristics of the structure from the vibration response data of the hollow slab bridge structure,and the extract process is simple and fast,which can provide an effective damage identification method for bridge structure.
关键词
响应数据特征/本征正交分解/本征正交模态/损伤识别/健康监测
Key words
response data feature/Proper Orthogonal Decomposition/Proper Orthogonal Modes/damage identification/health monitoring
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