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The application of a fuzzy inference system and analytical hierarchy process based online evaluation framework to the Donghai Bridge Health Monitoring System

  • Dan, Danhui (Department of Bridge Engineering, Tongji University) ;
  • Sun, Limin (State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University) ;
  • Yang, Zhifang (Shanghai Municipal Engineering Research Institute (SHMERI)) ;
  • Xie, Daqi (Donghai Bridge Management Ltd.)
  • Received : 2012.06.10
  • Accepted : 2013.07.29
  • Published : 2014.08.25
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Abstract

In this paper, a fuzzy inference system and an analytical hierarchy process-based online evaluation technique is developed to monitor the condition of the 32-km Donghai Bridge in Shanghai. The system has 478 sensors distributed along eight segments selected from the whole bridge. An online evaluation subsystem is realized, which uses raw data and extracted features or indices to give a set of hierarchically organized condition evaluations. The thresholds of each index were set to an initial value obtained from a structure damage and performance evolution analysis of the bridge. After one year of baseline monitoring, the initial threshold system was updated from the collected data. The results show that the techniques described are valid and reliable. The online method fulfills long-term infrastructure health monitoring requirements for the Donghai Bridge.

Keywords

References

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