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Damage Detection of Concrete Gravity Dams using Hilbert-Huang Method Cover

Damage Detection of Concrete Gravity Dams using Hilbert-Huang Method

Open Access
|Feb 2019

Abstract

Damage detection in concrete gravity dams using Hilbert-Huang Method, as one of the most common signal processing techniques, is studied in this research. After considering a typical geometry for dams, damage is modelled by a reduction in the modulus of elasticity in the dam’s body (in three levels of damage) and in different areas of the structure. The dam is excited by a horizontal earthquake and the primary natural frequencies of the dam are calculated by applying Hilbert-Huang Method to the measured response, which is the acceleration of five points in the system. Based on the changes in the frequencies of the damaged and undamaged structure, a parameter, called relative frequency error, has been introduced. The results show that the proposed criterion used in this study can not only properly identify the location of damage but also predict the severity of the structural damage in concrete gravity dams accurately.

Language: English
Page range: 7 - 16
Submitted on: May 26, 2018
Accepted on: Sep 5, 2018
Published on: Feb 14, 2019
Published by: University of Oradea, Civil Engineering and Architecture Faculty
In partnership with: Paradigm Publishing Services
Publication frequency: 2 issues per year

© 2019 Sajad Esmaielzadeh, Hassan Ahmadi, Seyed Abbas Hosseini, published by University of Oradea, Civil Engineering and Architecture Faculty
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.