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http://dx.doi.org/10.12989/sem.2014.49.2.183

A direct damage detection method using Multiple Damage Localization Index Based on Mode Shapes criterion  

Homaei, F. (School of Civil Engineering, Iran University of Science & Technology)
Shojaee, S. (Department of Civil Engineering, Shahid Bahonar University)
Amiri, G. Ghodrati (School of Civil Engineering, Iran University of Science & Technology)
Publication Information
Structural Engineering and Mechanics / v.49, no.2, 2014 , pp. 183-202 More about this Journal
Abstract
A new method of multiple damage detection in beam like structures is introduced. The mode shapes of both healthy and damaged structures are used in damage detection process (DDP). Multiple Damage Localization Index Based on Mode Shapes (MDLIBMS) is presented as a criterion in detecting damaged elements. A finite element modeling of structures is used to calculate the mode shapes parameters. The main advantages of the proposed method are its simplicity, flexibility on the number of elements and so the accuracy of the damage(s) position(s), sensitivity to small damage extend, capability in prediction of required number of mode shapes and low sensitivity to noisy data. In fact, because of differential and comparative form of MDLIBMS, using noise polluted data doesn't have major effect on the results. This makes the proposed method a powerful one in damage detection according to measured mode shape data. Because of its flexibility, damage detection process in multi span bridge girders with non-prismatic sections can be done by this method. Numerical simulations used to demonstrate these advantages.
Keywords
structural damage detection; Multiple Damage Localization Index Based on Mode Shapes (MDLIBMS); Finite element modeling; Damage detection process (DDP);
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Times Cited By KSCI : 1  (Citation Analysis)
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