<abstract xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></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.

Damage Detection of Concrete Gravity Dams using Hilbert-Huang Method

Department of Civil Engineering, Science and Research Branch

Department of Civil Engineering, Roodehen Branch

Journal of Applied Engineering Sciences

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Damage Detection of Concrete Gravity Dams using Hilbert-Huang Method"}

Damage detection in concrete gravity dams using Hilbert-Huang Method, as one of the most common signal processing techniques, is studied in this research....

Damage Detection of Concrete Gravity Dams using Hilbert-Huang Method

Published Online: Feb 14, 2019

Page range: 7 - 16

Received: May 26, 2018

Accepted: Sep 05, 2018

DOI: https://doi.org/10.2478/jaes-2018-0012

Keywords
structural damage, damage index, modal shapes, signal processing, relative frequency error

© 2018 Sajad Esmaielzadeh et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Damage Detection of Concrete Gravity Dams using Hilbert-Huang Method

Published Online: Feb 14, 2019

Page range: 7 - 16

Received: May 26, 2018

Accepted: Sep 05, 2018

DOI: https://doi.org/10.2478/jaes-2018-0012

Keywordsstructural damage, damage index, modal shapes, signal processing, relative frequency error

© 2018 Sajad Esmaielzadeh et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
structural damage, damage index, modal shapes, signal processing, relative frequency error