26 March 2012 Electromechanical impedance-based health diagnosis for tendon and anchorage zone in a nuclear containment structure
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Abstract
For a nuclear containment structure, the structural health monitoring is essential because of its high potential risk and grave social impact. In particular, the tendon and anchorage zone are to be monitored because they are under high tensile or compressive stress. In this paper, a method to monitor the tendon force and the condition of the anchorage zone is presented by using the impedance-based health diagnosis system. First, numerical simulations were conducted for cases with various loose tensile forces on the tendon as well as damages on the bearing plate and concrete structure. Then, experimental studies were carried out on a scaled model of the anchorage system. The relationship between the loose tensile force and the impedance-based damage index was analyzed by a regression analysis. When a structure gets damaged, the damage index increases so that the status of damage can be identified. The results of the numerical and experimental studies indicate a big potential of the proposed impedance-based method for monitoring the tendon and anchorage system.
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Jiyoung Min, Jiyoung Min, Hyojin Shim, Hyojin Shim, Chung-Bang Yun, Chung-Bang Yun, } "Electromechanical impedance-based health diagnosis for tendon and anchorage zone in a nuclear containment structure", Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 83454O (26 March 2012); doi: 10.1117/12.919867; https://doi.org/10.1117/12.919867
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