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Experiments of Vibration Control of SMA Damper-stayed Cable System


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Experiments of Vibration Control of SMA Damper-stayed Cable System
ZUO Xiao-bao1LI Ai-qun2SUN Xiang-hua1
1.School of Sciences,NUST,Nanjing 210094,China;2.College of Civil Engineering,Southeast University,Nanjing 210096,China
shape memory alloys dampers stayed cables vibration control
In order to control vibration of cable in cable-stayed bridge under external excitation such as wind and rain,a shape memory alloy(SMA) damper is designed and installed on the stayed cable.The structure and analytical model of the damper,and the vibration equation of a SMA damper-stayed cable system are presented.Taking 1∶60 model of the Runyang cable-stayed bridge(in Jiangsu,China) as a test platform,the experiments on vibration control of the system made up of SMA damper,stayed cable and bridge deck are carried out to investigate the effects of SMA damper on the model-cable’s vibration control under free vibration and excitation induced by the deck free vibration.Experimental results show that the SMA damper installed in plane of the cable can decrease 50% of the free vibration decay time of the cable in plane,and reduce above 39% of the cable in-plane coupling vibration response peaks induced by the deck vibration.The SMA damper can effectively control the vibration of the cable.


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Last Update: 2008-12-30