| 摘要 |
PROBLEM TO BE SOLVED: To provide a bridge provided with dynamic vibration absorber for insuring wind resisting stability against coupled flutter. SOLUTION: A bridge 1 is provided with dynamic vibration absorbers 2 for restraining flutter vibration due to wind from being revealed, and one or more of the dynamic vibration absorbers 2 are arranged in the fixed positions in the lengthwise direction of the bridge 1 so as not to excite a horizontal vibration mode, close to the frequency at fluttering of the bridge. For not exciting the horizontal vibration mode, there is two sorts of arranging position, and the first position is the positions where the respective horizontal force of a plurality of the dynamic vibration absorbers cancel with each other. The second positions where the absorbers are provided on the nodes of the horizontal vibration mode not to excite the horizontal mode even if the dynamic vibration absorbers generate horizontal force. Hereby because the dynamic vibration absorbers 2 do not excite the horizontal mode, flutter vibration can be restrained without being influenced from the horizontal mode.
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