Structural health monitoring of a cable-stayed bridge using acceleration data via wireless smart sensor network

S. Cho, J. Park, H. J. Jung, C. B. Yun, S. Jang, H. Jo, B. F. Spencer, T. Nagayama, J. W. Seo

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

Abstract

This paper presents the data analysis results of structural health monitoring (SHM) carried out on a cable-stayed bridge in Korea (the 2 nd Jindo Bridge) using a dense array of scalable wireless smart sensors. As a prior work, a finite element (FE) model is constructed based on an in-depth study of the detailed drawings, and the acceleration data from the existing wired monitoring system is analyzed to be used as a reference data of wireless sensors' performance. A total of 70 wireless smart sensor nodes have been deployed underneath of the deck, on the pylons, and on the cables to capture the vibration of the bridge excited by traffic and environmental loadings. Data analysis is carried out for modal properties of deck/pylon and tension forces of cables. Modal properties of the bridge are identified using the stochastic subspace identification methods based on the measured 3-axis acceleration, and the results are compared with those obtained from the existing wired monitoring system and FE analysis. Tension forces of 10 parallel wire strand cables among 60 stay cables are also estimated from the ambient acceleration data, and compared with those of the initial design and obtained during two previous regular inspections. The results of the data analyses demonstrate that the present dense wireless smart sensor networks perform very effectively for SHM of the cable-stayed bridge, giving direct access to the physical status of the bridge.

Original languageEnglish (US)
Title of host publicationBridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management
Pages158-164
Number of pages7
StatePublished - 2010
Event5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010 - Philadelphia, PA, United States
Duration: Jul 11 2010Jul 15 2010

Publication series

NameBridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management

Other

Other5th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2010
CountryUnited States
CityPhiladelphia, PA
Period7/11/107/15/10

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Building and Construction

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  • Cite this

    Cho, S., Park, J., Jung, H. J., Yun, C. B., Jang, S., Jo, H., Spencer, B. F., Nagayama, T., & Seo, J. W. (2010). Structural health monitoring of a cable-stayed bridge using acceleration data via wireless smart sensor network. In Bridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management (pp. 158-164). (Bridge Maintenance, Safety, Management and Life-Cycle Optimization - Proceedings of the 5th International Conference on Bridge Maintenance, Safety and Management).