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Proceedings Paper

Electromechanical impedance-based health diagnosis for tendon and anchorage zone in a nuclear containment structure
Author(s): Jiyoung Min; Hyojin Shim; Chung-Bang Yun
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Paper 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.

Paper Details

Date Published: 26 March 2012
PDF: 9 pages
Proc. SPIE 8345, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012, 83454O (26 March 2012); doi: 10.1117/12.919867
Show Author Affiliations
Jiyoung Min, KAIST (Korea, Republic of)
Hyojin Shim, KAIST (Korea, Republic of)
Chung-Bang Yun, KAIST (Korea, Republic of)

Published in SPIE Proceedings Vol. 8345:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2012
Masayoshi Tomizuka; Chung-Bang Yun; Jerome P. Lynch, Editor(s)

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