Cable clamp for clamping suspension cable on suspension bridge equipped with carbon fiber suspension cable

Abstract

The invention relates to a cable clamp for clamping a suspension cable on a suspension bridge equipped with the carbon fiber suspension cable. The cable clamp comprises an upper holding cylinder and alower holding cylinder, wherein the upper holding cylinder and the lower holding cylinder are fixedly connected by bolts; the opposite surfaces of the upper holding cylinder and the lower holding cylinder are incurved; a through hole is formed between the incurved surface of the upper holding cylinder and the incurved surface of the lower holding cylinder; the carbon fiber suspension cable is clamped in the through hole; the diameter of the through hole gradually becomes larger in the longitudinal direction from the center position to two ends of the through hole; and the largest diameter onthe ends of the through hole is the same as the diameter of the carbon fiber suspension cable which is clamped. The cable clamp for clamping the suspension cable on the suspension bridge equipped withthe carbon fiber suspension cable is capable of avoiding excessive shear stress on the carbon fiber suspension cable at the ends of the cable clamp, greatly improving the anti-sliding resistance on the cable clamp, effectively solving the problem of stress relaxation, and enabling the carbon fiber suspension cable to be always in a stable and long-lasting good stress state. The cable clamp is simple in structure, convenient to manufacture and construct, high in practicability, and suitable for clamping the suspension cable on the suspension bridge equipped with the carbon fiber suspension cable.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a cable clamp used for clamping a large cable on a carbon fiber large cable suspension bridge. Background technique [0002] Carbon fiber cables have outstanding advantages such as high tensile strength, light weight, corrosion resistance and low relaxation. Using them to replace the steel wire cables commonly used on suspension bridges can greatly reduce the self-weight of the bridge, improve the bearing capacity of the bridge, and avoid the need for large steel cables. The problem of water immersion corrosion does not require precise waterproof and anti-corrosion treatment. [0003] For suspension bridges with super long spans, carbon fiber cables are an ideal cable material, but the existing cable clamp through holes for clamping steel wire cables are straight cylindrical holes. , there are many defects: (1) The transverse elastic modulus of carbon fiber...

AI Technical Summary

Problems solved by technology

[0003] For suspension bridges with super long spans, carbon fiber cables are an ideal cable material, but the existing cable clamp through holes for clamping steel wire cables are straight cylindrical holes. , there are many defects: (1) The transverse elastic modulus of carbon fiber is very small. When the clamping force of the cable clamp is large, the transverse shrinkage deformation of the large carbon fiber cable is large, and the clamping force outside the cable clamp suddenly becomes zero. As a result, the transverse shear stress concentration at the end of the cable clamp (especially the outermost cable of the large cable) is concentrated, and there is a small-radius bending problem, while the carbon fiber cable has poor shear resistance and small-radius bending resistance. It will seriously weaken the bearing capacity of the large cable; (2) The longitudinal shear resistance of the carbon fiber surface is also relatively weak. When a certain sling is replaced, the pulling force of the sling adjacent to the sling increases, and the sliding force becomes larger, so the large cable needs a high anti-slip safety reserve; (3) The stress relaxation problem of the carbon fiber large cable clamp is relatively large The steel wire large cable clamp is more serious, and the anti-slip force dissipates faster

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