Detection of contiguous and distributed damage through contours of equal frequency change

Lakshmanan, N and Raghuprasad, BK and Gopalakrishnan, N. and Sathishkumar, K and Murthy, SGN (2010) Detection of contiguous and distributed damage through contours of equal frequency change. In: Journal of Sound and Vibration, 32926 (9). pp. 1310-1331.

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Abstract

The paper presents the results of a computational modeling for damage identification process for an axial rod representing an end-bearing pile foundation with known damage and a simply supported beam representing a bridge girder. The paper proposes a methodology for damage identification from measured natural frequencies of a contiguously damaged reinforced concrete axial rod and beam, idealized with distributed damage model. Identification of damage is from Equal_Eigen_value_change (Iso_Eigen_value_Change) contours, plotted between pairs of different frequencies. The performance of the method is checked for a wide variation of damage positions and extents. An experiment conducted on a free-free axially loaded reinforced concrete member and a flexural beam is shown as examples to prove the pros and cons of this method. (C) 2009 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Additional Information:	Copyright for this article belongs to Elsevier science.
Department/Centre:	Others
Date Deposited:	17 Mar 2010 11:39
Last Modified:	19 Sep 2010 05:57
URI:	http://eprints.iisc.ernet.in/id/eprint/26203

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