Understanding the impulse response method applied to concrete bridge decks

D. J. Clem, J. S. Popovics, T. Schumacher, T. Oh, S. Ham, D. Wu

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

Abstract

The Impulse Response (IR) method is a well-established form of non-destructive testing (NDT) where the dynamic response of an element resulting from an impact event (hammer blow) is measured with a geophone to make conclusions about the element's integrity, stiffness, and/or support conditions. The existing ASTM Standard C1740-10 prescribes a set of parameters that can be used to evaluate the conditions above. These parameters are computed from the so-called 'mobility' spectrum which is obtained by dividing the measured bridge deck response by the measured impact force in the frequency domain. While applying the test method in the laboratory as well as on an actual in-service concrete bridge deck, the authors of this paper observed several limitations that are presented and discussed in this paper. In order to better understand the underlying physics of the IR method, a Finite Element (FE) model was created. Parameters prescribed in the Standard were then computed from the FE data and are discussed. One main limitation appears to be the use of a fixed upper frequency of 800 Hz. Test data from the real bridge deck as well as the FE model both show that most energy is found above that limit. This paper presents and discusses limitations of the ASTM Standard found by the authors and suggests ways for improving it.

Original languageEnglish (US)
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation, Volume 32
EditorsDale E. Chimenti, Donald O. Thompson
PublisherAmerican Institute of Physics Inc.
Pages1333-1340
Number of pages8
ISBN (Electronic)9780735411296
DOIs
StatePublished - Jan 1 2013
Event39th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2012 - Denver, United States
Duration: Jul 15 2012Jul 20 2012

Publication series

NameAIP Conference Proceedings
Volume1511
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference39th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2012
CountryUnited States
CityDenver
Period7/15/127/20/12

Keywords

  • Concrete Bridge Decks
  • Impulse Response
  • Non-Destructive Testing
  • Shallow Delaminations

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Understanding the impulse response method applied to concrete bridge decks'. Together they form a unique fingerprint.

  • Cite this

    Clem, D. J., Popovics, J. S., Schumacher, T., Oh, T., Ham, S., & Wu, D. (2013). Understanding the impulse response method applied to concrete bridge decks. In D. E. Chimenti, & D. O. Thompson (Eds.), Review of Progress in Quantitative Nondestructive Evaluation, Volume 32 (pp. 1333-1340). (AIP Conference Proceedings; Vol. 1511). American Institute of Physics Inc.. https://doi.org/10.1063/1.4789197