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Structural health monitoring of concrete columns subjected to seismic excitations using piezoceramic-based sensors

机译：使用基于压电陶瓷的传感器监测地震激励下混凝土柱的结构健康

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摘要

Structural health monitoring of concrete structures under seismic loads has always attracted a lot of attention in the earthquake engineering community. In this paper, two tests of structural health monitoring of concrete columns using piezoceramic-based sensors are presented. The first test was a shake table test of a reinforced concrete (RC) column. A piezoceramic-based device, called a 'smart aggregate', was pre-embedded and adopted for the structural health monitoring of the concrete column under earthquake excitations. The second test of this study was the in situ health monitoring of RC piers of Niu-Dou Bridge in Taiwan, under seismic loading. RC piers instrumented with the post-embedded piezoceramic-based sensors were tested using reversed cyclic loading. During the shake table test and the in situ reversed cyclic loading test, one sensor was used as an actuator to generate propagating waves, and the other sensors were used to detect the waves. By analyzing the wave response, the existence of cracks can be detected and the severity can be estimated. The experimental results demonstrate the sensitivity and the effectiveness of the piezoceramic-based approach in the structural health monitoring of large-scale concrete structures under earthquake loading.
机译：地震荷载下混凝土结构的结构健康监测一直引起地震工程界的广泛关注。在本文中，提出了两种使用基于压电陶瓷的传感器对混凝土柱进行结构健康监测的测试。第一个测试是钢筋混凝土（RC）柱的振动台测试。预先嵌入了一种基于压电陶瓷的设备，称为“智能骨料”，并用于地震激励下混凝土柱的结构健康监测。这项研究的第二项测试是在地震荷载下对台湾牛头桥RC墩的现场健康监测。使用反向循环载荷对装有后置压电陶瓷传感器的RC墩进行了测试。在振动台测试和原位反向循环载荷测试中，一个传感器用作致动器以生成传播的波，另一传感器用于检测波。通过分析波浪响应，可以检测到裂纹的存在，并可以估计其严重程度。实验结果证明了基于压电陶瓷的方法在地震荷载下对大型混凝土结构的结构健康监测的敏感性和有效性。

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