Abstract
It is necessary to accurately estimate the dynamic characteristics of stay cables, especially dam** ratios, in order to design a cable damper for the appropriate vibration mitigation of a cable-stayed bridge in service. In this study, a vibration exciter has been developed to evaluate the cable dam** of a cable-stayed bridge. The feasibility of the developed system was verified through field tests on a 100 m long stay cable. The dam** ratios of the stay cable were estimated based on acceleration data as well as on displacement data measured by a digital image processing technique. The performance of the passively operated magneto-Rheological (MR) dampers with different voltage inputs were investigated by comparing the estimated dam** ratios. It has been found that the newly developed vibration exciter has advantages in its simple mechanism, easy on-site installation, and quick resonance finding algorithm.
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References
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Lee, JJ., Kim, JM., Ahn, SS. et al. Development of a cable exciter to evaluate dam** ratios of a stay cable. KSCE J Civ Eng 14, 363–370 (2010). https://doi.org/10.1007/s12205-010-0363-6
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DOI: https://doi.org/10.1007/s12205-010-0363-6