Fast damage detection using max-peak and max-peak-time for PC box girder in vibration experiment
Fast damage detection using max-peak and max-peak-time for PC box girder in vibration experiment
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DOI：
10.1016/j.measurement.2019.107178
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发表时间：
2020-02
期刊：
影响因子：
5.6
通讯作者：
Xiong-Fei Ye;Chul‐Woo Kim;H. Ogai
中科院分区：
文献类型：
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作者：
Xiong-Fei Ye;Chul‐Woo Kim;H. Ogai
动态特征通常用于结构损伤诊断。除了模态分析的特征外，通常还关注一些描述波在结构中传播的特征，如波的强度、速度等。在人工损伤预应力混凝土箱梁实验数据处理中，将在重构组合矩阵中考察和分析最大峰值和最大峰值时间这两个时间序列的基本特征，以分别考察结构状态更新的全局信息，分别对应于波传播的速度和强度。在振动试验的各个阶段中，最大峰值时间和最大峰值矩阵的距离/二维相关系数曲线可以非常明显地反映PC箱梁发生的整体损伤，优于使用相同原始数据进行模态分析的某些模态特征。
Dynamic features are often used for structural damage diagnosis. Besides the features from the modal analysis, some other features describing the wave propagation in the structure are usually concerned, like the wave’s intensity, speed, etc. In the data processing of experiment on the pre-stressed concrete (PC) box girders with artificial damages, the max-peak and max-peak-time, two of the basic features of time series will be investigated and analyzed in reconstruction combination matrices to investigate the global information of the update of structural status respectively, which are corresponding to the speed and intensity of the wave propagation separately. In all stages of vibration experiment, curve of distance/2-D correlation coefficient of the max-peak-time and max-peak matrices can have very clear tendencies to demonstrate the global damage happened in the PC box girder, which are better than some modal features in modal analysis using the same original data.