Cable-stayed structure of a cable-stayed bridge

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...

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.

Images