| 摘要 |
PROBLEM TO BE SOLVED: To provide an aseismatic structure of an elevated bridge having excellent construction property and capable of holding aseismatic performance of an elevated rigid-frame bridge at a low cost. SOLUTION: This elevated rigid-frame bridge 1 is constituted in such a way that a second plate member 13 is fixed to a side face of a bridge pier 3 having predetermined height 3a so as to direct the other face 13b in the right angle direction to bridge axis and an end part 12a on one side is fixed to a lower end part of an upper structure 7 to erect a first plate member 12 in the vertical direction on one face 13a of the second plate member 13 in a manner of facing each other. A viscoelastic body 14 is filled into a clearance between both of them to constitute an aseismatic device 11. A hollow steel pipe 5c from the vicinity of an upper part having predetermined height 3a of the bridge pier 3 to which the aseismatic device 11 is fixed to a lower end part is formed in such a manner that, although its inside diameter is the same as that of a hollow steel pipe 5b from an upper end part to the vicinity of an upper part having predetermined height 3a, its diameter of cross section is larger than that of the latter, and its thickness of member is increased. COPYRIGHT: (C)2004,JPO
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