Damage identification of steel beams using local and global methods

Wang, Ying and Hao, Hong 2012, Damage identification of steel beams using local and global methods, Advances in structural engineering, vol. 15, no. 5, pp. 807-824, doi: 10.1260/1369-4332.15.5.807.

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Title Damage identification of steel beams using local and global methods
Author(s) Wang, Ying
Hao, Hong
Journal name Advances in structural engineering
Volume number 15
Issue number 5
Start page 807
End page 824
Total pages 18
Publisher Multi-Science Publishing
Place of publication London, England
Publication date 2012-05-01
ISSN 1369-4332
Keyword(s) damage identification
wave propagation
spectral element method
model updating
clonal selection algorithm
Summary Structural condition monitoring methods can be generally classified as local and global. While the global method needs only a small number of sensors to measure the low-frequency structural vibration properties, the acquired information is often not sufficiently sensitive to minor damages in a structure. Local methods, on the other hand, could be very sensitive to minor damages but their detection range is usually small. To overcome the drawbacks and take advantage of both methods, an integrated condition monitoring system has been recently developed for structural damage detection, which combines guided wave and structural vibration tests. This study aims at finding a viable damage identification method for steel structures by using this system. First, a spectral element modelling method is developed, which can simulate both wave propagation and structural vibration properties. Then the model is used in updating analysis to identify crack damage. Extensive numerical simulations and model updating works are conducted. The experimental and numerical results suggest that simply combining the objective functions cannot provide better structural damage identification. A two-stage damage identification scheme is more suitable for identifying damage in steel beams.
Language eng
DOI 10.1260/1369-4332.15.5.807
Field of Research 090506 Structural Engineering
Socio Economic Objective 870501 Civil Building Management and Services
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2012, Multi-Science Publishing
Persistent URL http://hdl.handle.net/10536/DRO/DU:30039034

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