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Using electrical, magnetic and acoustic sensors to detect damage in segmental concrete pipes subjected to permanent ground displacement

机译：使用电，磁和声传感器检测承受永久性地面位移的分段混凝土管中的损坏

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摘要

This paper describes results of an experimental study that used sensing methods for monitoring damage along segmental concrete pipelines resulting from permanent ground displacement across a simulated earthquake fault. The literature contains examples of such damage occurring during actual earthquakes, significantly impacting the functionality of the pipelines. Detecting the location of the damage and the extent of the damage in pipelines can significantly accelerate post-earthquake repair efforts. In this paper, electrical sensing methods, magnetic sensing, and acoustic emission are used to monitor structural damage in a segmental concrete pipeline during a large-scale test. In this test, the segmental concrete pipeline was subjected to a concentrated transverse permanent ground displacements (PGDs). The majority of the damage to the pipe segments was localized at the joints, especially the bell sections while the damage to the spigots was minimal. The damage extended away from the joints in the pipe segments in the immediate vicinity of the fault line. Telescoping (i.e., crushing of the bell-and-spigot) was a primary mode of failure that was observed. The results of this study indicate that electrical sensing methods (including the use of conductive grout), magnetic sensing, and acoustic emission, employed alone or in combination, can detect and quantify the damage in segmental concrete pipelines.
机译：本文介绍了一项实验研究的结果，该实验使用传感方法来监测由于模拟地震断层产生的永久性地面位移对分段混凝土管道造成的破坏。文献中包含在实际地震中发生此类破坏的示例，这些破坏严重影响了管道的功能。检测损坏的位置和管线中的损坏程度可以大大加快地震后的修复工作。在本文中，电感应方法，磁感应和声发射被用于监视大型测试期间分段混凝土管道中的结构破坏。在该测试中，分段混凝土管道承受了集中的横向永久性地面位移（PGD）。对管段的损坏大部分集中在接头处，尤其是钟形部分，而对插头的损坏则最小。损坏从断层线附近的管段的接缝处扩展开来。伸缩（即，压碎钟形和子形）是观察到的主要故障模式。这项研究的结果表明，单独或组合使用的电传感方法（包括使用导电灌浆），磁传感和声发射可以检测和量化分段混凝土管道中的损坏。

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