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Monitoring and Failure Analysis of Corroded Bridge Cables under Fatigue Loading Using Acoustic Emission Sensors
School of Civil Engineering, Dalian University of Technology, No. 2, Linggong Road, Dalian 116024, China
School of Civil Engineering, Harbin Institute of Technology, 92 Xidazhi Street, Harbin 150090, China
School of Civil and environmental Engineering, University of Science & Technology Beijing, 30 Xueyuan Road, Beijing 10083, China
* Author to whom correspondence should be addressed.
Received: 21 February 2012; in revised form: 19 March 2012 / Accepted: 20 March 2012 / Published: 26 March 2012
Abstract: Cables play an important role in cable-stayed systems, but are vulnerable to corrosion and fatigue damage. There is a dearth of studies on the fatigue damage evolution of corroded cable. In the present study, the acoustic emission (AE) technology is adopted to monitor the fatigue damage evolution process. First, the relationship between stress and strain is determined through a tensile test for corroded and non-corroded steel wires. Results show that the mechanical performance of corroded cables is changed considerably. The AE characteristic parameters for fatigue damage are then established. AE energy cumulative parameters can accurately describe the fatigue damage evolution of corroded cables. The failure modes in each phase as well as the type of acoustic emission source are determined based on the results of scanning electron microscopy. The waveform characteristics, damage types, and frequency distribution of the corroded cable at different damage phases are collected. Finally, the number of broken wires and breakage time of the cables are determined according to the variation in the margin index.
Keywords: bridge cable; acoustic emission; wavelet packet; corroded; fatigue damage
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MDPI and ACS Style
Li, D.; Ou, J.; Lan, C.; Li, H. Monitoring and Failure Analysis of Corroded Bridge Cables under Fatigue Loading Using Acoustic Emission Sensors. Sensors 2012, 12, 3901-3915.
Li D, Ou J, Lan C, Li H. Monitoring and Failure Analysis of Corroded Bridge Cables under Fatigue Loading Using Acoustic Emission Sensors. Sensors. 2012; 12(4):3901-3915.
Li, Dongsheng; Ou, Jinping; Lan, Chengming; Li, Hui. 2012. "Monitoring and Failure Analysis of Corroded Bridge Cables under Fatigue Loading Using Acoustic Emission Sensors." Sensors 12, no. 4: 3901-3915.