Debonding detection in FRP-strengthened concrete structures utilising nonlinear Rayleigh wave mixing

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dc.contributor.authorCao, Y.
dc.contributor.authorNg, C.T.
dc.contributor.authorSmith, S.T.
dc.date.issued2023
dc.description.abstractThis paper reports an investigation on the use of Rayleigh wave mixing method for the debonding detection in concrete structures strengthened with externally bonded fibre-reinforced polymer (FRP) composite plates. A three-dimensional (3D) finite element model is developed to simulate the propagation of Rayleigh waves in FRPstrengthened concrete structures. In this model, the frequency domain of the transmitted waves shows the generation of second harmonics and combinational harmonics on account of debonding. The numerically simulated results are then experimentally validated with carbon fibre-reinforced polymer (CFRP)-plated concrete blocks containing two different sizes of debonding. Based on the experimentally verified numerical model, parametric studies are then conducted, where a nonlinear debonding crack growth parameter is proposed. The nonlinear Rayleigh wave mixing method is proven to be practical, reliable, and sensitive for detecting debonding at bonded concrete-FRP interfaces in FRP-strengthened reinforced concrete (RC) structures.
dc.description.statementofresponsibilityYuqiao Cao, Ching Tai Ng, Scott T. Smith
dc.identifier.citationMeasurement, 2023; 214
dc.identifier.doi10.1016/j.measurement.2023.112736
dc.identifier.issn0263-2241
dc.identifier.issn1873-412X
dc.identifier.orcidSmith, S.T. [0000-0002-8837-1214]
dc.identifier.urihttps://hdl.handle.net/2440/138683
dc.language.isoen
dc.publisherElsevier BV
dc.relation.granthttp://purl.org/au-research/grants/arc/DP200102300
dc.relation.granthttp://purl.org/au-research/grants/arc/DP210103307
dc.relation.granthttp://purl.org/au-research/grants/arc/DP220103665
dc.rights© 2023 Elsevier Ltd. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.measurement.2023.112736
dc.subjectFRP-strengthened concrete; Debonding; Wave mixing; Contact acoustic nonlinearity; Higher harmonics; Combinational harmonics; Rayleigh wave
dc.titleDebonding detection in FRP-strengthened concrete structures utilising nonlinear Rayleigh wave mixing
dc.typeJournal article
pubs.publication-statusPublished

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