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Long-span bridges, such as suspension bridges or cable-stayed bridges, are highly vulnerable to the wind loads with its low bending / momentum stiffness and low damping ratio. The internal pressure on the bridge may be different at each construction phase, and even when the internal pressure has been anticipated for in-service stage, the vibration may still occur at the construction phase. If such vibration is left untouched, it may cause damages to the parts of the bridge. In case of footbridges, the vertical vibration induced by pedestrians may inflict the serviceability of the bridge, and may even cause structural damages if it’s severe enough, which are why the installation of TMD is required.
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Tuned Mass Damper(TMD) in action during the storm.
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Jindo Bridge
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Tuned Mass Damper(TMD) for inspection before the installation taking place at Jindo Bridge.
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Tuned Mass Damper(TMD) after the installation under the bridge deck at Jindo Bridge.
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Ulleungdo Footbridge
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Tuned Mass Damper was installed on Ulleungdo Footbridge to absorb the wind induced vibration
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