| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a seismic strengthening method for a bridge, which can realize seismic strengthening without applying direct lining strengthening to a bridge pier, or which can decrease the level of the lining strengthening even if the lining strengthening is performed. Ž<P>SOLUTION: The multispan bridge 1, in which a plurality of girders 2 continue in the direction of a bridge axis, is characterized in that the adjacent girders 2 and 2 can be connected together by means of a connecting device which is constituted to tie the girders 2 and 2 together in a range not exceeding the design expansion/contraction amount of an expansion joint device arranged between the adjacent girders 2 and 2, so as to prevent such a motion that a section between the girders 2 and 2 is opened/closed. A device, in which stoppers 5b and 5b are attached to both ends of a steel wire 5a with a predetermined length, or a seismic control damper is used as the connecting device 5. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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