VIBRATION BEHAVIOR OF HYBRID FRP CABLE UNDER INDIRECT EXCITATION
This paper presents the vibration behavior of hybrid FRP cable subjected to indirect excitation including external and parametric excitation, respectively. The background of applying hybrid basalt and carbon FRP (B/CFRP) cables in thousand-meter scale cable-stayed bridge and the studies on cable vibration were first introduced, based on which the advantages of hybrid B/CFRP cable, especially with self-damping design, were clarified. The detailed constitution and principle of self-damping design and the evaluation of the corresponding damping ratio were described then. The primary resonance responses of self-damping hybrid B/CFRP, as well as steel, CFRP and hybrid B/CFRP without self-damping cables, were analyzed in terms of dynamic equilibrium equations. The results show that (1) under external excitation, the amplitude of resonant vibration of self-damping hybrid B/CFRP cable exhibits approximate linearity and shows much smaller value compared with that of the other cables, meanwhile self-damping hybrid B/CFRP cable manifests much smaller increment of tension compared with steel cable; (2) the resonant vibration of self-damping B/CFRP cable can be only excited by relatively large amplitude of parametric excitation and the amplitude is smaller than that of the other cables, similarly, smaller increment of cable tension of self-damping hybrid B/CFRP cable are observed in comparison with that of the steel cable; (3) parametric excitation shows more significant influence to the resonant vibration of all of the cables, which is supposed to be investigated further.
vibration hybrid FRP cable indirect ezcitation self-damping
Xin Wang Zhi-Shen Wu
Department of Urban and Civil Engineering, Ibaraki University, Hitachi 316-8511, Japan
国际会议
广州
英文
1669-1675
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）