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Proceedings Paper

Health diagnosis of arch bridge suspender by acoustic emission technique
Author(s): Dongsheng Li; Jinping Ou
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Paper Abstract

Conventional non-destructive methods can't be dynamically monitored the suspenders' damage levels and types, so acoustic emission (AE) technique is proposed to monitor its activity. The validity signals are determined by the relationship with risetime and duration. The ambient noise is eliminated using float threshold value and placing a guard sensor. The cement mortar and steel strand damage level is analyzed by AE parameter method and damage types are judged by waveform analyzing technique. Based on these methods, all the suspenders of Sichuan Ebian Dadu river arch bridge have been monitored using AE techniques. The monitoring results show that AE signal amplitude, energy, counts can visually display the suspenders' damage levels, the difference of waveform and frequency range express different damage type. The testing results are well coincide with the practical situation.

Paper Details

Date Published: 5 March 2007
PDF: 7 pages
Proc. SPIE 6595, Fundamental Problems of Optoelectronics and Microelectronics III, 65952V (5 March 2007); doi: 10.1117/12.725910
Show Author Affiliations
Dongsheng Li, Harbin Institute of Technology (China)
Jinping Ou, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 6595:
Fundamental Problems of Optoelectronics and Microelectronics III

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