Spiral friction type anchor device for fiber reinforced composite material rib pull cable

Abstract

The invention discloses a spiral friction type anchor device for a fiber reinforced composite material rib pull cable. The spiral friction type anchor device comprises a cover plate A, a cover plate B, a post core and a pull cable fastener, wherein the cover plate A and the cover plate B are provided with spiral grooves, the post core is provided with a spiral groove, the cross section of the spiral grooves formed in the cover plates and the post core are respectively in semicircular shapes with the same diameter, the spiral grooves formed in the two cover plates and the post core are mutually matched for forming a space spiral groove with the round cross section, the cover plate A is respectively provided with an inlet hole and an output hole at the starting point and the terminal point of the spiral groove, an FRP (fiber reinforced plastic) rib pull cable with the same cross section diameter as the spiral grooves passes through the inlet hole of the cover plate A to be wound in the spiral groove of the core post and passes through the output hole of the cover plate A, the FPR rib pull cable is covered by a space rotating groove curve surface formed by the cover plates and the post core, and the tail end of the FRP rib pull cable is fixed by the pull cable fastener arranged on the cover plate A. The cover plate A, the cover plate B and the post core with the spiral groove are connected and fixed through positioning pins arranged at the two ends. The spiral friction type anchor device has the advantages that the structure is reasonable, the performance is reliable, and durability is realized.

Description

[0001] This application is a divisional application with application number: 201310278641.9, application date "2013.7.4", and name "Adjustable Preload Friction Anchor Applied to Fiber Reinforced Composite Rib Cables". technical field [0002] 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 [0003] 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 ...

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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