Chen, Hua-Peng and Maung, Than Soe (2014) Structural damage evolution assessment using the regularised time step integration method. Journal of Sound and Vibration, 333 (18). pp. 4104-4122. ISSN 0022-460X (doi:https://doi.org/10.1016/j.jsv.2014.04.044)

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Abstract

This paper presents an approach to identify both the location and severity evolution of damage in engineering structures directly from measured dynamic response data. A relationship between the change in structural parameters such as stiffness caused by structural damage development and the measured dynamic response data such as accelerations is proposed, on the basis of the governing equations of motion for the original and damaged structural systems. Structural damage parameters associated with time are properly chosen to reflect both the location and severity development over time of damage in a structure. Basic equations are provided to solve the chosen time-dependent damage parameters, which are constructed by using the Newmark time step integration method without requiring a modal analysis procedure. The Tikhonov regularisation method incorporating the L-curve criterion for determining the regularisation parameter is then employed to reduce the influence of measurement errors in dynamic response data and then to produce stable solutions for structural damage parameters. Results for two numerical examples with various simulated damage scenarios show that the proposed method can accurately identify the locations of structural damage and correctly assess the evolution of damage severity from information on vibration measurements with uncertainties.

Item Type:	Article
Additional Information:	[1] Manuscript received 4 May 2013, Revised 18 April 2014, Accepted 22 April 2014, Available online 17 May 2014.
Uncontrolled Keywords:	structural damage, evolution assessment, regularised time step integration method
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > School of Engineering (ENG) Faculty of Engineering & Science
Related URLs:	Publisher
Last Modified:	30 Jan 2017 15:11
URI:	http://gala.gre.ac.uk/id/eprint/11463

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