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Advances in Civil Engineering
Volume 2014, Article ID 174185, 14 pages
Research Article

Structural Damage Detection Based on Modal Parameters Using Continuous Ant Colony Optimization

1Department of Aerospace Engineering, Indian Institute of Technology, Kharagpur 721302, India
2Department of Civil Engineering, Veer Surendra Sai University of Technology, Burla 768018, India
3Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, India

Received 30 May 2014; Revised 3 September 2014; Accepted 3 September 2014; Published 30 September 2014

Academic Editor: Siamak Talatahari

Copyright © 2014 Aditi Majumdar 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.


A method is presented to detect and quantify structural damages from changes in modal parameters (such as natural frequencies and mode shapes). An inverse problem is formulated to minimize the objective function, defined in terms of discrepancy between the vibration data identified by modal testing and those computed from analytical model, which then solved to locate and assess the structural damage using continuous ant colony optimization algorithm. The damage is formulated as stiffness reduction factor. The study indicates potentiality of the developed code to solve a wide range of inverse identification problems.