Water-damper for Wind-induced Vibration control of Cable-stayed Bridge in Construction Stage

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (15) : 7-15.

Li Yu1，Pan Biao1，Li Chen2

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Abstract

relative to finished cable-stayed bridge, wind-induced vibration can be caused more easily in max double cantilever construction of cable-stayed bridge because of its low stiffness and damping. Water-damper is suggested with its convenience and low cost. And the CFD Analysis and vibration reduction test are carried on to study the effectiveness of vibration control. The CFD Analysis and vibration reduction test results show that: 1) System damping can be increased significantly by applying water-damper with holes. And structural vibration can be reduced effectively. 2) Effectiveness of water-damper can not be used with lower or higher opening rate. 3) If holes are applied in the edge of water-damper, external flow vortex will fall off. If holes are applied in the middle of water-damper, system damping will be increased. 4) Effect of holes in sides of water-damper on system damping will changed with the difference of position of holes. And the system damping can be decreased significantly with lower or higher opening rate of sides. 5) Effectiveness of water-damper can decreased with increasing volume. The optimal opening rate should also be designed to achieve good Effectiveness of vibration reduction. In conclusion, the vibration can be controlled effectively by applying water-damper with low cost and convenience, which is especially suitable for controlling wind-induced vibration in construction stage.

Key words

cable-stayed bridge / max double cantilever construction / water-damper / wind-induced vibration / vibration reduction and energy dissipation

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Li Yu1，Pan Biao1，Li Chen2. Water-damper for Wind-induced Vibration control of Cable-stayed Bridge in Construction Stage[J]. Journal of Vibration and Shock, 2016, 35(15): 7-15

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