Pretightening-force-adjustable friction-type anchorage device applied to fiber-reinforced composite material rib inhaul cable

Abstract

The invention discloses a pretightening-force-adjustable friction-type anchorage device applied to a fiber-reinforced composite material rib inhaul cable. The pretightening-force-adjustable friction-type anchorage device comprises a cover plate A, a cover plate B, a column core with a spiral groove, and an inhaul cable fastener, the cover plate A and the cover plate B are provided with spiral grooves respectively, sections of the spiral grooves in the cover plates and the column core are all semicircles identical in diameter, the spiral grooves in the two cover plates and the column core are matched with one another to form a space spiral groove with a round section, an inlet hole and an outlet hole are formed at the starting point and the ending point of the spiral groove of the cover plate A, an FRP (fiber reinforced polymer) rib inhaul cable identical with the section of the spiral groove in diameter penetrates the inlet hole of the cover plate A, is wound in the spiral groove in the column core and penetrates the outlet hole of the cover plate A, the FRP rib inhaul cable is wrapped by a curved surface of the space spiral groove formed by the cover plates and the column core, and the tail end of the FRP rib inhaul cable is fixed by the inhaul cable fastener mounted on the cover plate A. The pretightening-force-adjustable friction-type anchorage device applied to the fiber-reinforced composite material rib inhaul cable is reasonable in structure, reliable in performance and durable.

Description

technical field [0001] The invention relates to an anchoring device for fiber-reinforced composite material (FRP) tendon cables in civil engineering and traffic engineering, and is an adjustable pre-tightening force friction anchorage used in fiber-reinforced composite material tendon cables. Background technique [0002] At present, the maximum main span of cable-stayed bridges in the world has reached 1088m (Sutong Bridge), and the steel cables used have gradually reached their limit. Because as the span continues to increase significantly, the weight of the steel cable stays will increase significantly in the proportion of the load of the bridge, and at this moment the steel cable stays are no longer competent. Super-long-span suspension bridges also have the same problem. Carbon fiber reinforced composite (CFRP) tendons have the advantages of light weight, high strength, corrosion resistance, fatigue resistance, low relaxation, good electromagnetic insulation and good s...

AI Technical Summary

Problems solved by technology

The mechanical clamping anchor has the problem of uniformity of compressive stress in the clamping area; when the tension direction of the cable changes continuously, the mechanical clamping anchor also has problems such as bending and shear fatigue at the end of the clamping area. Bonded anchors also have problems such as bending at the end of the bonded area and shear fatigue.

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