Damage Evaluation Inside the Concrete Dam by Tomography and AE Analysis
Damage Evaluation Inside the Concrete Dam by Tomography and AE Analysis
复制标题
通过断层扫描和声发射分析评估混凝土坝内部的损坏
DOI：
10.1007/978-981-15-9837-1_26
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
K. Hashimoto
中科院分区：
文献类型：
--
作者：
Y. Yang;H. Asaue;T. Shiotani;K. Hashimoto
虽然弹性波法作为一种很有前途的无损检测方法受到了广泛的关注，但利用弹性波进行混凝土坝的损伤评估仍需深入研究。因此，在本研究中，弹性波法内部的混凝土坝的损伤评估，包括表征出现在坝表面的裂缝和自动连续监测AE活动的可行性进行。在检查廊道和坝体表面均布置传感器，在检查廊道和坝体表面分别用不同直径的钢球激发弹性波。弹性波层析成像和表面波层析成像都进行了。此外，在本研究中进行了AE测量，其中传感器水平布置在检查通道中。通过弹性波层析成像和表面波层析成像，揭示了裂纹的长度和深度分布。此外，还证实了布置在检查廊道内的声发射传感器可以测量到坝体内部的声发射，表明了通过声发射分析进行损伤监测的可能性。
Although the elastic wave method has received much attention as a promising NDT method, the utilization of elastic wave on the damage evaluation of concrete dams still needs in-depth research. Therefore, in this research, the feasibility of the elastic wave method inside the damage evaluation of concrete dams, including characterization of the cracks appearing on the dam surface and the automatic continuous monitoring by AE activities were carried out. Sensors were arranged both in the inspection gallery and the surface of the dam, and the elastic wave was excited by steel balls of several diameters both in the inspection gallery and the surface of the dam body. Both elastic wave tomography and surface wave tomography were conducted. In addition, AE measurement has been conducted in this research, in which the sensors were arranged horizontally in the inspection gallery. As a result, the length and the depth distributions of the crack were revealed by elastic wave tomography and surface wave tomography. In addition, it was confirmed that the sensors arranged in the inspection gallery could measure AE inside the dam, indicated the possibility of damage monitoring by AE analysis.