Smart Structures and Systems

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Optimal sensor placement for cable force monitoring using spatial correlation analysis and bond energy algorithm

  • Li, Shunlong (Department of Bridge and Tunnel engineering, Harbin Institute of Technology) ;
  • Dong, Jialin (Zhejiang Scientific Research Institute of Transport) ;
  • Lu, Wei (Department of Civil and Environment Engineering, Harbin Institute of Technology (Shenzhen), HIT Campus of Xili University Town) ;
  • Li, Hui (Department of Bridge and Tunnel engineering, Harbin Institute of Technology) ;
  • Xu, Wencheng (CCCC Highway Consultants CO., Ltd. (HPDI)) ;
  • Jin, Yao (CCCC Highway Consultants CO., Ltd. (HPDI))
  • Received : 2017.04.21
  • Accepted : 2017.11.14
  • Published : 2017.12.25
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Abstract

Cable force monitoring is an essential and critical part of the safety evaluation of cable-supported bridges. A reasonable cable force monitoring scheme, particularly, sensor placement related to accurate safety assessment and budget cost-saving becomes a major concern of bridge administrative authorities. This paper presents optimal sensor placement for cable force monitoring by selecting representative sensor positions, which consider the spatial correlativeness existing in the cable group. The limited sensors would be utilized for maximizing useful information from the monitored bridges. The maximum information coefficient (MIC), mutual information (MI) based kernel density estimation, as well as Pearson coefficients, were all employed to detect potential spatial correlation in the cable group. Compared with the Pearson coefficient and MIC, the mutual information is more suitable for identifying the association existing in cable group and thus, is selected to describe the spatial relevance in this study. Then, the bond energy algorithm, which collects clusters based on the relationship of surrounding elements, is used for the optimal placement of cable sensors. Several optimal placement strategies are discussed with different correlation thresholds for the cable group of Nanjing No.3 Yangtze River Bridge, verifying the effectiveness of the proposed method.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China

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