Debonding detection of FRP strengthened concrete beams by using impedance measurements and an ensemble PSO adaptive spectral model

Sun, Rui and Sevillano Bravo, Enrique and Perera Velamazán, Ricardo (2015). Debonding detection of FRP strengthened concrete beams by using impedance measurements and an ensemble PSO adaptive spectral model. "Composite Structures", v. 125 ; pp. 374-387. ISSN 0263-8223. https://doi.org/10.1016/j.compstruct.2015.02.011.

Description

Title: Debonding detection of FRP strengthened concrete beams by using impedance measurements and an ensemble PSO adaptive spectral model
Author/s:
  • Sun, Rui
  • Sevillano Bravo, Enrique
  • Perera Velamazán, Ricardo
Item Type: Article
Título de Revista/Publicación: Composite Structures
Date: July 2015
ISSN: 0263-8223
Volume: 125
Subjects:
Freetext Keywords: FRP strengthening; Concrete; Debonding; Electromechanical impedance; Spectral model; Structural health monitoring
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Mecánica
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

An impedance-based midspan debonding identification method for RC beams strengthened with FRP strips is presented in this paper using piezoelectric ceramic (PZT) sensor?actuators. To reach this purpose, firstly, a two-dimensional electromechanical impedance model is proposed to predict the electrical admittance of the PZT transducer bonded to the FRP strips of an RC beam. Considering the impedance is measured in high frequencies, a spectral element model of the bonded-PZT?FRP strengthened beam is developed. This model, in conjunction with experimental measurements of PZT transducers, is used to present an updating methodology to quantitatively detect interfacial debonding of these kinds of structures. To improve the performance and accuracy of the detection algorithm in a challenging problem such as ours, the structural health monitoring approach is solved with an ensemble process based on particle of swarm. An adaptive mesh scheme has also been developed to increase the reliability in locating the area in which debonding initiates. Predictions carried out with experimental results have showed the effectiveness and potential of the proposed method to detect prematurely at its earliest stages a critical failure mode such as that due to midspan debonding of the FRP strip.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainBIA2013-46944-C2-1-PUnspecifiedUniversidad Politécnica de MadridDesarrollo de tecnologías inteligentes de monitorización estructural inalámbrica basadas en sensores FBG y PZT

More information

Item ID: 35882
DC Identifier: http://oa.upm.es/35882/
OAI Identifier: oai:oa.upm.es:35882
DOI: 10.1016/j.compstruct.2015.02.011
Official URL: http://www.sciencedirect.com/science/article/pii/S0263822315000872
Deposited by: Memoria Investigacion
Deposited on: 01 Mar 2016 10:01
Last Modified: 31 Jul 2016 22:30
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