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19 April 2013 Vibration-based damage identification of reinforced concrete member using optical sensor array data
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Detect and locate the structural damage from direct measurements can be done only when the sensors are very closely located to the damage initiating point, which is generally impossible to predict, particularly for the reinforced concrete structures. With the availability of high resolution distributed sensing, using optical tracker on light targets, the damage location as well as the level of damage can be identified. The objective of this paper is to conduct structural system identification of reinforced concrete frame by using the proposed structural integrity index (identify element curvature and null-space damage index) and the estimation of finite element strain. Finally, discussion on the identified time-varying system natural frequency and stiffness/strength degradation of the reinforced concrete structure from global measurement in relating to the calculated structural integrity index using optical sensing array data and element strain on the identification of damage location and damage severity are presented.
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Chin-Hsiung Loh, Shu-Hsien Chao, and Chi-Hang Li "Vibration-based damage identification of reinforced concrete member using optical sensor array data", Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 86920A (19 April 2013);

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