High-damping composite stay cable based on carbon fibers and steel strands

Abstract

The invention discloses a high-damping composite stay cable based on carbon fibers and steel strands, and relates to the field of stay cables. The high-damping combined stay cable comprises a core layer, 2-4 composite layers and 1-2 layers of sheaths which are arranged in sequence from inside to outside, wherein a sticky elastic damping material is filled between the core layer and each composite layer; the core layer consists of a plurality of high-intensity steel strands which are tightly arrayed; the composite layers consist of a plurality of composite fibers which are tightly arrayed; the adjacent composite layers are tightly attached; the composite fibers are prepared from a high-intensity steel wire and six carbon fibers; the six carbon fibers wrap the periphery of the high-intensity steel wire and are twisted to form a whole. Vibration attenuation of the stay cable can be accelerated, and the wind-resistant stability of an ultralong stay cable is effectively improved; the weight of the stay cable is reduced, and the transverse shear strength of the stay cable is guaranteed; furthermore, single-cable transportation and cable hanging can be realized, and the ultralong stay cable construction difficulty is reduced.

Description

technical field [0001] The invention relates to the field of stay cables, in particular to a high-damping composite stay cable based on carbon fibers and steel strands. Background technique [0002] The cable-stayed cable is the main load-bearing component of the cable-stayed bridge. The equivalent stiffness of the cable-stayed cable determines the overall stiffness of the cable-stayed bridge. As the span of the cable-stayed bridge increases, the length of the cable-stayed cable also increases. , when the span of the cable-stayed bridge is greater than 2km, it is necessary to use ultra-long steel cable-stayed cables with a length greater than 1km. [0003] The existing ultra-long steel cable-stayed cables not only have a large weight, but also have poor wind resistance stability. In the process of using ultra-long steel cable-stayed cables to erect cable-stayed bridges, the construction of tensioning ultra-long steel cable-stayed cables is relatively difficult. ; After the ...

AI Technical Summary

Problems solved by technology

[0006] (1) For long-span cable-stayed bridges made of composite cable-stayed cables, aerodynamic damping measures are usually required, or dampers are installed on the cables to increase the wind-resistant stability of the cables, and the cost of use High; when the span of the cable-stayed bridge is greater than 2km, it is difficult for aerodynamic vibration reduction measures and dampers to increase the wind resistance stability of the cable-stayed bridge

[0007] (2) When using composite cable-stayed cables for the construction of cable-stayed bridges with a span greater than 2km, it is necessary to use large-scale lifting equipment to transport the entire strand of cable-stayed cables, and at the same time use super-large soft traction devices and tie-rod traction devices for traction, making construction difficult larger

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