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Damage Identification on an Iron Bridge Based on Spectral Analysis

 Damage Identification on an Iron Bridge Based on Spectral Analysis
Author(s): , ,
Presented at IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013, published in , pp. 146-147
DOI: 10.2749/222137813806474624
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This paper reports about damage identification on a single-span iron bridge based on recorded ambient vibrations. Several local damage scenarios were imposed stepwise to the structure.

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Bibliographic Details

Author(s):


Medium: conference paper
Language(s): English
Conference: IABSE Conference: Assessment, Upgrading and Refurbishment of Infrastructures, Rotterdam, The Netherlands, 6-8 May 2013
Published in:
Page(s): 146-147 Total no. of pages: 8
Page(s): 146-147
Total no. of pages: 8
Year: 2013
DOI: 10.2749/222137813806474624
Abstract:

This paper reports about damage identification on a single-span iron bridge based on recorded ambient vibrations. Several local damage scenarios were imposed stepwise to the structure.

Random vibration tests were conducted, and the induced dynamic response of the bridge in the undisturbed as well as in modified “damaged” conditions was recorded. The recorded vibrations were subjected to Operational Modal Analysis identification methods and to spectral analyses. It is shown that the shift of the relative cumulative spectral energy at different damage levels is an appropriate damage indicator. Thus, spectral analysis could be a promising tool for long-term vibration based structural health monitoring.

Keywords:
railroad bridge rail bridge structural health monitoring damage detection Ambient response spectral analysis