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Vibration-Based Monitoring of Prestress-Loss in PSC Girder Bridges  

Kim, Jeong-Tae (부경대학교 해양공학과)
Hong, Dong-Soo (부경대학교 해양공학과)
Park, Jae-Hyung (부경대학교 해양공학과)
Cho, Hyun-Man (부경대학교 해양공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.21, no.1, 2008 , pp. 83-90 More about this Journal
Abstract
A vibration-based monitoring system is newly proposed to predict the loss of prestress forces in prestressed concrete (PSC) girder bridges. Firstly, a global damage alarming algorithm is newly proposed to monitor the occurrence of prestress-loss by using the change in frequency responses. Secondly, a prestress-loss prediction algorithm is selected to estimate the extent of prestress-loss by using the change in natural frequencies. Finally, the feasibility of the proposed system is experimentally evaluated on a scaled PSC girder model for which acceleration responses were measured for several damage scenarios of prestress-loss.
Keywords
vibration-based monitoring; prestress-loss; damage detection; psc girder; natural frequency; acceleration response;
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Times Cited By KSCI : 1  (Citation Analysis)
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