Chapter
Apr 26, 2012
Damage Identification of Beam-Like Structures through Static Deflection and Natural Frequency as Damage Indicators
Authors: K. Muthumani, N. Lakshmanan, N. Gopalakrishnan, K. Sathishkumar, R. Sreekala, and G. V. Rama RaoAuthor Affiliations
Publication: Indo-U.S. Forensic Practices: Investigation Techniques and Technology
Abstract
The paper proposes a first stage structural health monitoring methodology using natural frequencies and static deflections as damage indicators. The idea is that the first stage monitoring can be done for a large number of bridges and vulnerable structures in a remote manner and the features extracted from the data should help in determining whether any second stage detailed investigation is warranted. Hence, simple, fast and robust strategies are required for estimating the health of the structure using some of the globally available response data. Identification methodology developed in this paper is applicable to distributed smeared damage, which is typical of reinforced concrete structures. Simplified expressions and methodologies are proposed and validated in the paper, numerically and experimentally towards damage estimation.
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© 2010 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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K. Muthumani
Scientist, CSIR-Structural Engineering Research Centre, Chennai — 600113, India
N. Lakshmanan
Project Advisor, Director (Retired), CSIR-Structural Engineering Research Centre, Chennai — 600113, India
N. Gopalakrishnan
Scientist, CSIR- Structural Engineering Research Centre, Chennai — 600113, India
K. Sathishkumar
Scientist, CSIR-Structural Engineering Research Centre, Chennai — 600113, India
R. Sreekala
Scientist, CSIR-Structural Engineering Research Centre, Chennai — 600113, India
G. V. Rama Rao
Scientist, CSIR-Structural Engineering Research Centre, Chennai — 600113, India
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