Study on Optimized Shock Absorption Design of a Floating Cable-Stayed Bridge

Abstract:

Floating system of cable-stayed bridges under seismic action will produce larger longitudinal bending moment and displacement, in order to ensure the safety of the structure, damping measures should be taken in longitudinal direction. Taking a mainspan for 416 m of the cable-stayed bridge as an example, four different damper layout schemes were analyzed by nonlinear dynamic time history method. The results show that installing viscous dampers at the abutment location to function better comparing with other three cases. For getting the best damping effect, the optimal parameters of damper are analyzed. The investigation indicates that adding viscous dampers can significantly reduce the girder movements, and the reduction depends on damper parameters. Finally, the optimal damping parameters with ξ=0.3 and C=10000 can be chosen for this cable-stayed bridge.

• Periodical: Applied Mechanics and Materials (Volumes 438-439)
• Pages: 874-878
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.438-439.874
• Online since: October 2013
• Authors: Sheng Ping Wu, Li Xu, Zhen Zheng Fang
• Keywords: Cable-Stayed Bridge, Regression Analysis, Shock Absorption Design, Viscous Damper

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