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Acoustic Emission Equipment for Infrastructure Monitoring; Research summary rept. (Final)
| 题名： | Acoustic Emission Equipment for Infrastructure Monitoring; Research summary rept. (Final) |
| 作者： | Shield, C. K. |
| 关键词： | Nondestructive tests; Birder bridges; Acoustic emission; Girders; Welded joints; Steel bridges; Concrete bridges; Flow detection; Acoustics; Cracking(Fracturing); Oscilloscopes; Fatigue testing machines |
| 摘要： | This project details the development and evaluation of an acoustic emission (AE) system for monitoring large scale structures, both in the lab and in the field. The system consists of acoustic emission sensors, preamplifiers, filers, an AE monitor, and a digital oscilloscope. The system has been applied successfully to both steel and concrete structures and used to detect brittle fracture and low-cycle fatigue failures in welded steel joints and crack propagation in cover-plated rolled bridge girders, in the field and in the laboratory. The AE system detected initial cracking during the flexural crack testing of two high-strength concrete prestressed bridge girders. The acoustic emission monitoring of bond tests also provided insight into the behavior of the bond between glass fiber reinforced polymer rebar and concrete. |
| 总页数： | 20p |
| 报告类型： | 科技报告 |
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