SEMI-ACTIVE VIBRATION CONTROL OF STAY CABLE INSTALLED WITH MAGNETORHEOGICAL FLUID DAMPERS
This paper presents innovative vibration controls of stay cables in cable-stayed bridges using semi-active MR fluid dampers. Theoretical analysis and experimental investigation along with in-situ tests are conducted in this study. The behavior of the MR damper is predicted by the modified Bouc-Wen model based on the performance test of the MR damper. The control efficiency of the MR dampers to reduce the stay cable using passive and semi-active control strategy are tested and compared with each other strategy. Experimental results demonstrate that all control strategies of the MR damper are effective to mitigate the stay cable model vibration. Moreover,the semi-active MR damper can achieve much better mitigation efficacy than the passive MR dampers due to negative stiffness provided by the semi-active MR damper. Based on the measured experimental data,a model of MR damper coupled with stay cable is proposed to better predict the MR damper response with the constant current input. The developed model is validated by the numerical simulations of the measured experimental data.
Stay cable Vibration control Semi-active Magnetorheogical fluid damper
Min Liu Hui Li Xin-Chun Guan
School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,P.R. China
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
1137-1142
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）