Title:
DAMPER OF DIAGONAL CABLE IN CABLE STAYED BRIDGE
Document Type and Number:
Japanese Patent JP2993403
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent effectively and easily various vibrations of diagonal cables in a cable stayed bridge.
SOLUTION: A cylindrical magnetic material 2 surrounding a part of a diagonal cable 6 portion is surrounded with a distance from the outer periphery of the magnetic material 2. The vibration of a diagonal cable 6 is restricted at a part of the diagonal cable by making use of the attraction force between the cable and a cylindrical magnet 3 fixed to the main girder 7 and the restricted state is released by making use of the reverse force against the attraction force during vibration to change the vibration mode of the diagonal cable. The restriction and release of vibration are repeated alternately to transfer the energy of the primary vibration mode to a high order and prevent the promotion of vibration and also reduce steady vibrations.
Inventors:
KATAMURA RITSUTAI
NAKANO TATSUJI
NAKANO TATSUJI
Application Number:
JP22999095A
Publication Date:
December 20, 1999
Filing Date:
September 07, 1995
Export Citation:
Assignee:
KAJIMA KENSETSU KK
International Classes:
E01D1/00; E01D11/00; E01D11/04; E01D19/16; F16F15/03; (IPC1-7): E01D1/00; E01D11/00
Attorney, Agent or Firm:
Satoshi Hisakado (1 person outside)
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