Stay-cable sticky shearing type damper with steering mechanism
A steering mechanism and damper technology, applied in cable-stayed bridges, bridge parts, bridge forms, etc., can solve problems such as reducing the installation height of shock absorbers, affecting the installation of shock absorbers, and affecting the landscape of the entire bridge, and achieves maintenance of landscape, Avoid conflict and ensure the effect of installation height
Inactive Publication Date: 2010-09-08
GUANGDONG PROVINCIAL CHANGDA HIGHWAY ENG
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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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[0025] The Hangzhou Bay Cross-sea Bridge is a convenient channel for the main national highway and the third line to cross Hangzhou Bay. It spans the wide Hangzhou Bay sea area with a total length of 36km. It is currently the longest cross-sea bridge built in the world. The design speed is 100km / h. The bridge has two navigation channels, south and north. The south channel bridge is an A-type single-tower double-cable steel box girder cable-stayed bridge with a main span of 318m, and the navigation clearance is 31m. Tower double-cable plane (space cable) steel box girder cable-stayed bridge with a navigation clearance of 47m. In order to improve the safety of driving on the navigation bridge, the China Communications Highway Planning and Design Institute designed and placed wind barriers outside the railings on both sides of the bridge deck of the north-south channel bridge. The height of the wind barriers is h 1 =3.4m, near tower section h 2 =4.27. It should be said that th...
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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 idealdamping 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 damper with a steering mechanism for reducing the vibration of stay cables in a stay bridge. Background technique [0002] Cable-stayed bridge, as a new type of flexible structure with large-span capability, has developed rapidly in the past fifteen years. With the increase of its span, the cables are also growing. Due to the economy of multi-lane long-span bridges, the number of A-type tower schemes increases, and the use of space cables and parallel cables is also increasing. From a different perspective, the secret system has become a trend. Since the stay cable is a slender member with light weight, high flexibility and small damping, various wind-induced vibrations of the stay cable are becoming more and more prominent. my country is a country with a land coastline of 18,000 kilometers. It is estimated that nearly ...
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IPC IPC(8): E01D19/00E01D11/04
Inventor 王中文陈儒发王波肖桂强顾金钧
Owner GUANGDONG PROVINCIAL CHANGDA HIGHWAY ENG