CFRP-steel combined cable structure and electrochemical anti-corrosion method using rainwater to conduct electricity

Abstract

The invention relates to a CFRP-steel combined cable structure, which comprises a sheath, a plurality of parallel steel wires and an internal CFRP cable strand are arranged in the sheath, an insulating permeable cladding is arranged on the surface of the internal CFRP cable strand, the parallel steel wires are electrically connected with the negative electrode of a rectifier, the internal CFRP cable strand is electrically connected with the positive electrode of the rectifier, and the rectifier is connected with a power source; the invention further discloses an electrochemical anti-corrosion method utilizing rainwater to conduct electricity, rainwater enters the sheath through the damaged part on the sheath and forms an electric connection path after flowing through the parallel steel wires and the internal CFRP cable strands, and the rectifier is matched with the power source to apply external potential to the internal CFRP cable strands to form cathode protection. The corrosion can be effectively inhibited, and the service life of an existing cable is greatly prolonged.

Description

technical field [0001] The invention relates to the field of design and manufacture of composite cables for super-long-span suspension bridges, in particular to a CFRP-steel composite cable structure and an electrochemical anti-corrosion method using rainwater to conduct electricity. Background technique [0002] For more than a century, with the continuous improvement of the strength of high-strength steel wires, the spans of completed suspension bridges have also been continuously increased. In the construction of larger-span suspension bridges in the future, the uneconomical and difficult construction brought about by too large main cable area will become prominent problems, which must be solved by improving the material strength or using other high-strength new materials. The final design of the upcoming Messina Strait Bridge is a road-rail dual-purpose suspension bridge with a span layout of 960m+3300m+810m. The two famous proposals for the 14Km gorge-wide bridge colle...

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Problems solved by technology

[0004] However, the design theory of lightweight suspension bridge cables and the applicability of wind resistance design theory and the current theory need to be further studied. International research on CFRP suspension bridges is currently in its infancy, and domestic research in this area is still very little. Many scientific issues and The key technology has not been solved, and the relevant design and construction guidelines have not yet been formed, and systematic and in-depth research is urgently needed

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