Wave number-based technique for detecting slope discontinuity in simple beams using moving test vehicle

J. D. Yau, Judy Ping Yang*, Y. B. Yang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The wavelength characteristic is a useful clue for locating and assessing the severity of slope discontinuity in beams. In this study, the slope discontinuity of a beam is represented by an internal hinge restrained by elastic springs, and the wavelength of the beam is calculated indirectly from the vertical response of a test vehicle during its travel over the beam. The key parameters of the problem at hand are first unveiled using an approximate, closed-form solution for the response of the vehicle moving at low speeds over the bridge. Then a two-beam element model with slope discontinuity is formulated for the vehicle-bridge interaction (VBI) system for use in numerical simulation. In the examples, the wavenumber-based response of the test vehicle is used to identify the location and severity of the discontinuity in the beam. It is demonstrated that the wavelength-based technique presented herein by using the moving test vehicle as a moving sensor system offers a promising, alternative approach for damage detection in girder type bridges.

Original languageEnglish
Article number1750060
JournalInternational Journal of Structural Stability and Dynamics
Volume17
Issue number6
DOIs
StatePublished - 1 Aug 2017

Keywords

  • Bridge
  • slope discontinuity
  • test vehicle
  • wave number
  • wavelength

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