| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration control structure for a bridge, which can reliably and effectively improve earthquake performance of the bridge by vibration control, and a setting method for the same.SOLUTION: A vibration control mechanism B, in which an inertia mass damper 4 and a spring member 5 are connected together in series, is installed in the state of being connected to upper and lower structures 2 and 3 in parallel with a bearing 6. The upper and lower structures 2 and 3 are relatively displaced, and a weight of the inertia mass damper 4 is rotated to exert an inertia mass effect. A frequency of the vibration control mechanism B, which is determined by the inertia mass damper 4 and the spring member 5, is synchronized with a predominant frequency of a bridge 1 by the spring member 5.SELECTED DRAWING: Figure 1 |
