Abstract
Up-to-date structural health monitoring (SHM) studies have been focused mostly on in-land structures such as bridge and building. Only a few research efforts have been made for harbor structures such as caisson-type breakwater. For stability assessment of harbor caisson structures, it is very essential to monitor vibration responses with limited accessibility, to analyze the vibration features, and to specify the sensitive motions with respect to damage in the caisson-foundation’s interface. In this paper, a wireless sensing system for SHM of harbor caisson structures is presented. To achieve the objective, the following approaches were implemented. First, a wave-induced vibration sensing system was designed for global structural health monitoring. Second, global SHM methods which are suitable for damage monitoring of caisson structures were selected to alarm the occurrence of unwanted behaviors. Third, a SHM scheme was designed for the target structure by implementing the selected SHM methods. Operation logics of the SHM methods were programmed based on the concept of the wireless sensor network. Finally, the performance of the proposed system was globally evaluated for a field harbor caisson structure for which a series of tasks were experimentally performed by the wireless sensing system.
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Acknowledgments
Acknowledgements This work was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011-0004253). The authors also would like to acknowledge the financial support of the project ‘Development of inspection equipment technology for harbor facilities’ funded by Korea Ministry of Land, Transportation, and Maritime Affairs.
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Lee, SY., Huynh, T.C., Yoon, HS., Kim, JT., Han, SH. (2013). Wave-Induced Vibration Monitoring for Stability Assessment of Harbor Caisson. In: Allemang, R., De Clerck, J., Niezrecki, C., Wicks, A. (eds) Special Topics in Structural Dynamics, Volume 6. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-6546-1_21
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DOI: https://doi.org/10.1007/978-1-4614-6546-1_21
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