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《Journal of Vibration and Shock》 2007-03
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STUDY ON SEISMIC RESPONSE CONTROL FOR A LONG-SPAN FLOATING CABLE-STAYED BRIDGE

QI Xing-jun1, LI Xiao-jun2(1.Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;2.Institute of Engineering Mechanics, China Earthquake Administration, Ha'erbin 150080, China )  
Vibration-suppressing effectiveness of active control, semi-active control and passive control for a long-span floating cable-stayed bridge is calculated and analyzed with its finite element model. Effect of seismic traveling wave on the seismic responses of the cable-stayed bridge is also analyzed. The results indicate that ground motion inputs with various frequency components evidently influence the vibration-suppressing effectiveness of the three control methods. Semi-active control is better than passive control always providing the max damping force for the control effectiveness of the whole seismic response. Influence of seismic traveling wave on the uncontrolled seismic response of the bridge is almost the same as that on the controlled seismic response. Traveling wave can make bad influence on the beam of the bridge, but it is beneficial to the bridge tower. Its bad influence on the three control methods is little. This study provides theoretic guide to vibration control for floating cable-stayed bridges.
【Fund】: 国家科技支撑计划资助重点项目(2006BAC13B02)
【CateGory Index】: U441.3
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