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将压电陶瓷片制成嵌入式压电功能元预埋入模拟了局部界面损伤的钢管混凝土柱试件内作为驱动器,在试件钢管外壁粘贴压电陶瓷片作为传感器,驱动器在信号源产生的电压信号作用下产生激励信号,测量钢管混凝土柱试件的监测面上不同位置上传感器的输出电信号。基于压电陶瓷传感器输出信号的小波包总能量和小波包能量谱对界面剥离损伤进行了识别,分别定义了两个界面剥离损伤指标EI和WVWPES,为监测钢管混凝土柱内部混凝土与钢管壁界面粘结质量提供了新的思路。
Piezoelectric ceramic embedded piezoelectric functional element embedded in the simulation of the local interface damage in the concrete filled steel tube specimens as a drive in the test piece steel pipe attached to the outer wall as a piezoelectric ceramic sensor, the driver generated in the signal source Under the action of voltage signal, an excitation signal is generated to measure the output signal of the sensor at different positions on the monitoring surface of the concrete filled steel tube specimens. Based on the total energy of wavelet packet and the wavelet packet energy spectrum of the output signal of piezoelectric ceramic sensor, the interface peel damage was identified. Two interface damage indexes, EI and WVWPES, were defined respectively. In order to monitor the interfacial adhesion between concrete and steel pipe wall Knot quality provides a new way of thinking.