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Smart Structures and Systems
  Volume 10, Number 4, October - November 2012, pages 313-329

Sensor placement for structural health monitoring of Canton Tower
Ting-Hua Yi, Hong-Nan Li and Ming Gu

    A challenging issue in design and implementation of an effective structural health monitoring (SHM) system is to determine where a number of sensors are properly installed. In this paper, research on the optimal sensor placement (OSP) is carried out on the Canton Tower (formerly named Guangzhou New Television Tower) of 610 m high. To avoid the intensive computationally-demanding problem caused by tens of thousands of degrees of freedom (DOFs) involved in the dynamic analysis, the three dimension finite element (FE) model of the Canton Tower is first simplified to a system with less DOFs. Considering that the sensors can be physically arranged only in the translational DOFs of the structure, but not in the rotational DOFs, a new method of taking the horizontal DOF as the master DOF and rotational DOF as the slave DOF, and reducing the slave DOF by model reduction is proposed. The reduced model is obtained by IIRS method and compared with the models reduced by Guyan, Kuhar, and IRS methods. Finally, the OSP of the Canton Tower is obtained by a kind of dual-structure coding based generalized genetic algorithm (GGA).
Key Words
    structural health monitoring (SHM); canton tower; optimal sensor placement (OSP); generalized genetic algorithm (GGA); model reduction
Ting-Hua Yi and Hong-Nan Li : School of Civil Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116023, China
Ting-Hua Yi and Ming Gu : State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University,
Shanghai 200092, China

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