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Cable-stayed structure of a cable-stayed bridge

A technology of cable-stayed cables and cable-stayed groups, which is applied to cable-stayed bridges, bridges, bridge parts, etc., and can solve the problems of inconvenient installation of dampers, inability to control cable surface vibration, and large cable spacing

Inactive Publication Date: 2011-12-14
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the stay cables in cable-stayed bridges are arranged in a plane or close to the plane. The above-mentioned scheme of installing dampers between adjacent stay cables can only control the vibration of the stay cables in the cable plane, but cannot control the vibration of the stay cables. Vibration outside the cable plane
Moreover, the distance between the cables is generally large, and it is very inconvenient to install the damper.

Method used

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  • Cable-stayed structure of a cable-stayed bridge
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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] A cable-stayed structure of a cable-stayed bridge, comprising a cable-stayed cable 3 and a damper 4, wherein every three cable-stayed cables 3 form a group of 3 cable-stayed cables, and three cable-stayed cables 3 of each group of cable-stayed cables 3 Arranged in a triangular space, its upper end is fixed on the bridge tower 2, and its lower end is fixed on the main girder 1; the damper 4 is installed between the two stay cables 3 of each stay cable group, and each stay cable The cables 3 are connected with the other two stay cables 3 in the same stay cable group through the damper 4, so that the damper 4 forms a spatial arrangement relative to the stay cables 3.

[0022] Such as image 3 As shown, each stay cable group is composed of three stay cables 3 arranged in a triangular space, and may or may not be parallel to each other. The distance between the thr...

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Abstract

The invention discloses a stay cable structure for a cable-stayed bridge, comprising stay cables and dampers, every three stay cables form a stay cable group and the three stay cables of each stay cable group are arranged according to a triangular space, the top ends of the stay cables are fixed on a bridge tower, and the lower ends are fixed on a main beam; each damper is installed between two stay cables of each stay cable group, each stay cable is connected with the other two stay cables in the same stay cable group via the damper, making the damper form a spatial arrangement with respective to the stay cables. The stay cable structure in the invention realizes spatial arrangement of three stay cables of each group, after the damper is connected with every two stay cables, when the stay cable group is under the effect of outside excitation, the three stay cables are in a spatial arrangement, and vibration characteristics are different, therefore, vibration of every stay cable in any direction is restricted by the other two stay cables, thereby realizing purpose of vibration damping. Since the installation positions of the dampers are determined by requirement of the vibration damping design, damping effect of the dampers can be developed to the greatest extent.

Description

technical field [0001] The invention relates to a cable-stayed cable arrangement and damping scheme of a cable-stayed bridge, in particular to a cable-stayed cable structure of a cable-stayed bridge. Background technique [0002] Cable-stayed bridges are a commonly used structural form of long-span bridges, and the layout of their cable-stayed cables is mostly planar. Due to its mechanical and geometric characteristics, stay cables are extremely susceptible to significant vibrations due to wind, earthquake, traffic loads and other factors. This vibration has a great adverse effect on the stay cable itself and the anchoring system at both ends, greatly reducing the durability of the stay cable system and the safety of the bridge. In order to suppress and reduce this kind of vibration, the commonly used measure is to install a vibration damper on the stay cable. Installing the damper requires a fulcrum. The current installation method is to install the damper between the low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/16E01D11/04
Inventor 孙宗光钱国桢
Owner DALIAN MARITIME UNIVERSITY
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