A Vibration Exciter for Evaluating Cable Damping of a Cable-Stayed Bridge

Jae Min Kim; Jong Jae Lee; Sang Sup Ahn; Jun Seong Choi

doi:10.4028/www.scientific.net/AST.56.206

Paper Titles

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Piezoelectric Sensor System for Structural Health Monitoring
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Monitoring Prestress Level in Seven Wire Prestressing Tendons by Inter Wire Ultrasonic Wave Propagation
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A Vibration Exciter for Evaluating Cable Damping of a Cable-Stayed Bridge
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Response Control Performance Evaluation of MR Damper by Shaking Table Tests and Real-Time Hybrid Tests
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A Reliability Assessment Model for MR Damper Components within a Smart Structural Control Scheme
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Ride Comfort Analysis of a Full-Vehicle Featuring Magnetorheological Shock Absorbers
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Anti-Overturning Control of a Serially Connected Isolation System Using Piezo Electric and MR Tube Support
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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 56A Vibration Exciter for Evaluating Cable Damping...

A Vibration Exciter for Evaluating Cable Damping of a Cable-Stayed Bridge

Abstract:

It is necessary to accurately estimate the dynamic characteristics of stay cables, especially damping ratios, to design cable damper for appropriate vibration mitigation of a cable-stayed bridge in service. In this study, a vibration exciter has been developed to evaluate the cable damping of a cable-stayed bridge. The feasibility of the developed system was verified through field tests on a 100m long stay cable. The damping ratios of the stay cable were estimated based on acceleration data as well as displacement data measured by digital image processing technique. The performance of the passively operated MR dampers with the different voltage inputs were investigated by comparing the estimated damping ratios.