Numerical simulations and experimental measurements of steel and ice impacts on concrete for acoustic interrogation of delaminations in bridge decks

Brian A. Mazzeo, Anjali N. Patil, Jeffrey M. Klis, Randy C. Hurd, Tadd T. Truscott, W. Spencer Guthrie

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Delaminations in bridge decks typically result from corrosion of the top mat of reinforcing steel, which leads to a localized separation of the concrete cover from the underlying concrete. Because delaminations cannot be detected using visual inspection, rapid, large-area interrogation methods are desired to characterize bridge decks without disruption to traffic, without the subjectivity inherent in existing methods, and with increased inspector safety. To this end, disposable impactors such as water droplets or ice chips can be dropped using automatic dispensers onto concrete surfaces to excite mechanical vibrations while acoustic responses can be recorded using air-coupled microphones. In this work, numerical simulations are used to characterize the flexural response of a model concrete bridge deck subject to both steel and ice impactors, and the results are compared with similar experiments performed in the laboratory on a partially delaminated concrete bridge deck slab. The simulations offer greater understanding of the kinetics of impacts and the responses of materials. © 2014 AIP Publishing LLC.
Original languageEnglish (US)
Title of host publicationAIP Conference Proceedings
PublisherAmerican Institute of Physics Inc.subs@aip.org
Pages895-902
Number of pages8
ISBN (Print)9780735412118
DOIs
StatePublished - Jan 1 2014
Externally publishedYes

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