Monitoring cracks and prestress-loss in PSC girder bridges using vibration-based damage detection techniques

Jae-Hyung Park; Jeong-Tae Kim; Yeon-Sun Ryu; Jung-Mi Lee

doi:10.1117/12.720907

11 April 2007 Monitoring cracks and prestress-loss in PSC girder bridges using vibration-based damage detection techniques

Jae-Hyung Park, Jeong-Tae Kim, Yeon-Sun Ryu, Jung-Mi Lee

Author Affiliations +

Proceedings Volume 6532, Health Monitoring of Structural and Biological Systems 2007; 65321V (2007) https://doi.org/10.1117/12.720907
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

In this study, a vibration-based method to simultaneously predict prestress-loss and flexural crack in PSC girder bridges is presented. Prestress-loss and flexural crack are two typical, but quite different in nature, types of damage which can be occurred in PSC girder bridges. The following approaches are implemented to achieve the objective. Firstly, two vibration-based damage detection techniques which can predict prestress-loss and flexural crack are described. The techniques are prestress-loss prediction model and mode-shape-based crack detection method. In order to verify the feasibility and practicality of the techniques, two different lab tests are performed. A free-free beam with external unbonded tendons is used to verify the feasibility of the prestress-loss prediction model. In additional, a PSC girder with an internal unbonded tendon is used to evaluate the practicality of the prestress-loss prediction model and the mode-shape- based crack detection method.

Citation Download Citation

Jae-Hyung Park, Jeong-Tae Kim, Yeon-Sun Ryu, and Jung-Mi Lee "Monitoring cracks and prestress-loss in PSC girder bridges using vibration-based damage detection techniques", Proc. SPIE 6532, Health Monitoring of Structural and Biological Systems 2007, 65321V (11 April 2007); https://doi.org/10.1117/12.720907

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