Implementation of a vibration-based bridge health monitoring system on scour issue

Tzu-Kang Lin, Yen-Po Wang, Ming Chih Huang*, Chen An Tsai

*Corresponding author for this work

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

4 Scopus citations

Abstract

Bridges are prone to suffer from multiple hazards such as earthquake, wind, or floods for the special structural characteristic. To guarantee the stability of bridge structure, how to precisely evaluate the scour depth of bridge foundation has become an important issue recently as most of the unexpected damage or collapse of bridges are caused by hydraulic issue. In this paper, a vibration-based bridge health monitoring system considering the response of superstructure only is proposed to rapidly evaluate the embedded depth of bridge column. To clarify the complex fluid-solid coupling phenomenon, the effect of embedded depth and water level was first verified through a series of static experiment. A finite element model with confinement simulated by soil spring was then established to illustrate the relationship between the fundamental frequency and the embedded depth. With the proposed algorithm, the health condition of the bridge can be inferred by processing the ambient vibration response of the superstructure. To implement the proposed algorithm, a SHM prototype system monitoring the environmental factors such as temperature, water level, and inclination was developed to support on-line processing. The performance of the proposed system was verified by a series of dynamic bridge scour experiment conducted in laboratory flume and compared with the reading from water-proof camera. The result has shown that by using the proposed vibration-based bridge health monitoring system, the embedded depth of bridge column during complex scour process can be reliably reflected.

Original languageEnglish
Title of host publicationInnovation for Applied Science and Technology
Pages1351-1357
Number of pages7
DOIs
StatePublished - 20 Feb 2013
Event2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012 - Kaohsiung, Taiwan
Duration: 2 Nov 20126 Nov 2012

Publication series

NameApplied Mechanics and Materials
Volume284-287
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Conference

Conference2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012
CountryTaiwan
CityKaohsiung
Period2/11/126/11/12

Keywords

  • Bridge scour
  • Short-time fourier transform
  • Structure health monitoring

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    Lin, T-K., Wang, Y-P., Huang, M. C., & Tsai, C. A. (2013). Implementation of a vibration-based bridge health monitoring system on scour issue. In Innovation for Applied Science and Technology (pp. 1351-1357). (Applied Mechanics and Materials; Vol. 284-287). https://doi.org/10.4028/www.scientific.net/AMM.284-287.1351