| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently suppress the deformation of an elevated bridge and to rationally adopt bridge piers of infilled steel pipe concrete construction. SOLUTION: A unit structural body A comprising bridge piers 1 and a bridge girder, and a unit structural body B comprising bridge piers 3 and a bridge girder 4 are connected, and a vibration control device is interposed at a connection part thereof. The flexural rigidity of the bridge piers 1, 3 are set to have difference between the natural periods of the respective unit structural bodies A, B. The unit structural bodies A with the bridge piers 1 of infilled steel pipe concrete construction, and the unit structure bodies B with the bridge piers 3 of reinforced concrete construction are alternately connected, and the flexural rigidity of the bridge piers 1 of infilled steel pipe concrete construction is set lower than that of the bridge piers 3 of reinforced concrete construction. A viscoelastic damper 5 constituted by inserting viscoelastic bodies 8, 10 in a bonded state between the relatively displaceable steel plates 6, 7, 9 is used as the vibration control device.
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