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Shock and Vibration
Volume 2014 (2014), Article ID 194753, 13 pages
http://dx.doi.org/10.1155/2014/194753
Research Article

Charged System Search Algorithm Utilized for Structural Damage Detection

1College of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
2Centre of Excellence for Fundamental Studies in Structural Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran

Received 12 June 2013; Revised 8 April 2014; Accepted 9 April 2014; Published 20 May 2014

Academic Editor: Gyuhae Park

Copyright © 2014 Zahra Tabrizian et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents damage detection and assessment methodology based on the changes in dynamic parameters of a structural system. The method is applied at an element level using a finite element model. According to continuum damage mechanics, damage is represented by a reduction factor of the element stiffness. A recently developed metaheuristic optimization algorithm known as the charged system search (CSS) is utilized for locating and quantifying the damaged areas of the structure. In order to demonstrate the abilities of this method, three examples are included comprising of a 10-elements cantilever beam, a Bowstring plane truss, and a 39-element three-story three-bay plane frame. The possible damage types in structures by considering several damage scenarios and using incomplete modal data are modeled. Finally, results are obtained from the CSS algorithm by detecting damage in these structures and compared to the results of the PSOPC algorithm. In addition, the effect of noise is shown in the results of the CSS algorithm by suitable diagrams. As is illustrated, this method has acceptable results in the structural detection damage with low computational time.