Intelligent parallel steel wire bridge suspension cable

Abstract

The invention relates to an intelligent parallel steel wire bridge suspension cable. With the cable adopted, the defect of incapability of realizing real-time monitoring of the cable body of a suspension cable in the prior art can be eliminated. The intelligent parallel steel wire bridge suspension cable comprises a cable body; a plurality of steel wires are arranged in parallel to form the cable body; grooves are formed in the peripheries of at least two steel wires in the cable body; closed type fiber grating strain sensors are arranged in the grooves; and the steel wires provided with the fiber grating strain sensors are arranged in a layered manner in a vertical direction in the cable body. The closed type fiber grating strain sensors are embedded into the grooves, since the closed type fiber grating strain sensors are not exposed at the exteriors of the steel wires, the closed type fiber grating strain sensors can be prevented from being broken due to squeezing and can be effectively protected; the closed type fiber grating strain sensors can monitor the cable body in real time; and the fiber grating strain sensors are arranged in a layered manner in a vertical direction in the cable body, the influence of suspension can be calculated according to the difference of the monitoring result of the fiber grating strain sensor at the upper layer and the monitoring result of the fiber grating strain sensor at the lower layer.

Description

technical field [0001] The invention relates to a suspension cable structure, in particular to an intelligent suspension cable for parallel steel wire bridges. Background technique [0002] Suspension cable, a cable carrying a load between two suspension points. Each point in the suspension cable can only bear tension, and the tension at each point is along the tangent direction of the suspension cable at this point. [0003] Since the advantage of the suspension cable is that each point only bears tension but no bending moment, the force analysis is relatively simple, so the design is simple and reliable and can give full play to the performance of the steel, so as to achieve the economic effect of saving materials and reducing weight. Cable suspension structures have been widely used in some large-span building structures in modern times. Such as suspension bridges. [0004] Suspension bridge, also known as suspension bridge (suspension bridge), refers to a bridge that ...

AI Technical Summary

Problems solved by technology

[0010] The invention solves the defect that the cable body of the suspension cable cannot be monitored in real time in the prior art, and provides an intelligent suspension cable of a parallel steel wire bridge. Grooves are arranged in the steel wires, and optical fiber gratings are arranged in the grooves to realize real-time monitoring of the cable stays. , while protecting the fiber grating

[0011] The present invention also solves the defect that the existing monitoring method cannot monitor the suspension of the suspension cable, and provides an intelligent suspension cable of a parallel steel wire bridge. Monitoring of force changes in the suspension direction of the suspension cable

[0012] The invention also solves the defect that the existing optical fiber grating is pasted on the inner wall of the groove, and the sensitivity of the strain measurement will be reduced during the stress process of the cable body, and provides an intelligent suspension cable for parallel steel wire bridges, the optical fiber grating is not isolated from the inner wall of the groove. Paste directly, thereby reducing the influence on the sensitivity of strain measurement during the stress process of the steel wire

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