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High-Speed Acoustic Impact-Echo Sounding of Concrete Bridge Decks
Journal of Nondestructive Evaluation ( IF 2.8 ) Pub Date : 2020-07-13 , DOI: 10.1007/s10921-020-00695-0
Lorin J. Hendricks , Jared S. Baxter , Yao Chou , Mavrik Thomas , Enoch Boekweg , W. Spencer Guthrie , Brian A. Mazzeo

Evaluation of deteriorating highway bridges requires new, rapid inspection methods to effectively guide repair in an era of limited fiscal resources. Of all the components of a bridge, the bridge deck typically deteriorates most quickly and must therefore be regularly inspected for non-visible internal cracking, called delamination, for which early detection and repair can enhance safety and performance as well as reduce long-term maintenance costs. This research demonstrates the development and deployment of a multi-channel acoustic impact-echo sounding apparatus equipped with specially-configured tire chains for acoustic excitation of the concrete, microphones, an array of sensors for establishing spatial position estimates, and a data processing architecture for accurately detecting and mapping delaminations in concrete bridge decks at high speeds. The new apparatus achieved very accurate results at speeds between 25 and 45 km/h across a bridge deck. These results demonstrate an orders-of-magnitude increase in data collection speed over all other acoustic impact-echo sounding techniques described in the literature.

中文翻译:

混凝土桥面板的高速声学冲击回波测深

在财政资源有限的时代,对不断恶化的公路桥梁进行评估需要新的、快速的检查方法来有效指导修复。在桥梁的所有组件中,桥面通常老化得最快,因此必须定期检查不可见的内部裂缝,称为分层,早期检测和修复可以提高安全性和性能,并减少长期维护成本。这项研究展示了多通道声学冲击回波测深仪的开发和部署,该仪器配备了用于混凝土声激励的特殊配置的轮胎链、麦克风、用于建立空间位置估计的传感器阵列、以及用于高速准确检测和绘制混凝土桥面板分层的数据处理架构。新设备以 25 至 45 公里/小时的速度穿过桥面取得了非常准确的结果。这些结果表明,与文献中描述的所有其他声学冲击回波探测技术相比,数据收集速度提高了一个数量级。
更新日期:2020-07-13
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