Stay-cable sticky shearing type damper with steering mechanism

Abstract

The invention discloses a inclined stay cable viscous shearing type damper with a steering mechanism used in bridge building field, which comprises: a damping container filled with macromolecular viscous material, a plugboard and a support; the damping container is disposed on the support; one end of the plugboard is disposed in the macromolecular viscous material in the damping container, and the other end is connected with the stay cable of bridge. The invention is characterized in that: a stay cable steering mechanism capable of changing the inclination angle on the horizontal plane or bridge side surface is disposed between the plugboard and the stay cable. By disposing a steering mechanism capable of transmitting vibration response on the viscous shearing type damper, the invention ensures the installation height of the vibration damper on cable, avoids the conflict of the vibration damper body and air partition, maintains the good look of the whole bridge, and achieves the ideal damping effect.

Description

Technical field [0001] The invention relates to a vibration damping device in the field of bridge construction, in particular to a stay cable viscous shear type damper with a steering mechanism for reducing cable vibration in a cable-stayed bridge. Background technique [0002] Cable-stayed bridges, as a new type of flexible structure with large spanning capabilities, have developed rapidly in the past 15 years. With the increasing of its span, the cable is also growing. Due to the economy of multi-lane long-span bridges, the number of A-type tower schemes has increased, and the use of space cables and parallel cables has also increased. From a perspective, the Misso system has become a trend. In view of the fact that the stay cable is a slender member with light weight, high flexibility and low damping, the various wind-induced vibrations of the stay cable are also increasingly prominent. my country is a country with a coastline of 18,000 kilometers. It is estimated that my coun...

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Problems solved by technology

The research shows that for the passive control system, the ratio of the distance Xc between the installation position of the shock absorber and the anchorage point of the lower end cable to the cable length L is best kept in the range of 0.03. Small) should not be less than 0.025. Due to the limitations of the above characteristics, when the bridge is equipped with wind barrier facilities, the installation of the shock absorber will be affected, because the horizontal deflection angle of the bridge axis near the tower cable is relatively large during the implementation process, so It caused overlap with the wind barrier facilities, so the installation height of the shock absorber had to be lowered, which seriously affected the landscape of the whole bridge

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