Reconfigurable wireless monitoring systems for bridges: validation on the Yeondae Bridge

Junhee Kim, Jerome P. Lynch, Daniele Zonta, Jong Jae Lee, Chung Bang Yun

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

1 Citation (Scopus)

Abstract

The installation of a structural monitoring system on a medium- to large-span bridge can be a challenging undertaking due to high system costs and time consuming installations. However, these historical challenges can be eliminated by using wireless sensors as the primary building block of a structural monitoring system. Wireless sensors are low-cost data acquisition nodes that utilize wireless communication to transfer data from the sensor to the data repository. Another advantageous characteristic of wireless sensors is their ability to be easily removed and reinstalled in another sensor location on the same structure; this installation modularity is highlighted in this study. Wireless sensor nodes designed for structural monitoring applications are installed on the 180 m long Yeondae Bridge (Korea) to measure the dynamic response of the bridge to controlled truck loading. To attain a high nodal density with a small number (20) of wireless sensors, the wireless sensor network is installed three times with each installation concentrating sensors in one portion of the bridge. Using forced and free vibration response data from the three installations, the modal properties of the bridge are accurately identified. Intentional nodal overlapping of the three different sensor installations allows mode shapes from each installation to be stitched together into global mode shapes. Specifically, modal properties of the Yeondae Bridge are derived off-line using frequency domain decomposition (FDD) modal analysis methods.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7292
EditionPART 1
DOIs
Publication statusPublished - 8 Mar 2009
EventSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009 - San Diego, CA, United States
Duration: 9 Mar 200912 Mar 2009

Conference

ConferenceSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009
CountryUnited States
CitySan Diego, CA
Period9/03/0912/03/09

Keywords

  • FDD
  • modal analysis
  • structural monitoring
  • wireless sensor
  • bridges
  • concrete bridges
  • domain decomposition methods
  • dynamic response
  • electric network synthesis
  • frequency domain analysis

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  • Cite this

    Kim, J., Lynch, J. P., Zonta, D., Lee, J. J., & Yun, C. B. (2009). Reconfigurable wireless monitoring systems for bridges: validation on the Yeondae Bridge. In Proceedings of SPIE - The International Society for Optical Engineering (PART 1 ed., Vol. 7292). [72920T] https://doi.org/10.1117/12.816007