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Published in:
2011 | OriginalPaper | Chapter
Effectiveness of Smart Dampers for Hybrid FRP Cable in Long-Span Cable-Stayed Bridge
Authors : Xin Wang, Zhishen Wu
Published in: Advances in FRP Composites in Civil Engineering
Publisher: Springer Berlin Heidelberg
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This paper presents a theoretical evaluation of modal damping of hybrid FRP cable with smart dampers for long-span cable-stayed bridge. Based on previous studies of FRP and hybrid FRP cables, hybrid FRP cable exhibited advantages in static and dynamic behavior compared with conventional steel cables and newly developed CFRP cables. One of the advantages is its designable sectional structure that can improve internal damping and benefit vibrational control of stay cable under various excitations. To validate the effectiveness of hybrid FRP cable with smart damper design, the principle and design consideration of smart dampers were first described. Based on the energy principle, the theoretical expression on modal damping was derived for in-plane vibration. Finally, in terms of a detail designed hybrid FRP cable with smart damper, the damping ratio was evaluated which demonstrated the effectiveness of smart damper design.