Vortex induced vibrations and the controlling experiment research of Central-slotted Box Section for suspension bridge
OUYANG Ke-jian,CHEN Zheng-qing,HAN Yan,LI Hong-li
(1. Wind Engineering Experiment Research Center, Hunan University, Changsha 410082, Hunan, China;
2. School Of Civil Engineering and Architecture, Changsha 410076, Hunan, China)
Abstract: Vortex induced vibrations(VIV) and the controlling measure of Central-slotted Box Section for Suspension Bridges have been studyed by wind tunnel experiments in this paper, The conversion relationships between the resonant amplitudes of the sectional model and the prototype bridge are considered, and the correction coefficients of mode shape are also presented. Both of the two controlling VIV methods designed in this paper may control the VIV successful. The second method is able to control the VIV effectively which have been presented in this paper on condition that do not alter the the section shape,and the second method also correspond to actual engineering practice needs. The research has alsio shown that it is effective to restrain the amplituds of VIV by increasing the damping ratio.