Anchorage and manufacturing process of cfrp tendon stay cable group anchors for bridges

Abstract

The invention discloses a CFRP rib inhaul cable group anchorage device for a bridge. The device comprises an anchor cup, an upper wire separation end plate, a lower wire separation end plate and multiple wire separation partition plates located between the upper wire separation end plate and the lower wire separation end plate are arranged in the anchor cup, the ends of CFRP ribs penetrate through a wire separation vibration attenuation block, the lower wire separation end plate, all the wire separation partition plates and the upper wire separation end plate in sequence from bottom to top and then are fixed to the upper wire separation end plate, the upper wire separation end plate, the lower wire separation end plate and all the wire separation partition plates are each provided with wire separation holes allowing the CFRP rib to pass through, each wire separation hole is internally provided with a gasket, the space formed by the upper end plate, the lower end plate and the inner wall of the anchor cup is divided into multiple filling chambers by the wire separation partition plates, and each filling chamber is filled with rubber mass. According to the CFRP rib inhaul cable group anchorage device, the wire separation end plates and the wire separation partition plates are arranged in the anchor cup, so that wire separation and fixation for the CFRP ribs are facilitated, meanwhile, the anchorage device is separated into the multiple filling chambers, the rubber mass in each filling chamber is made of hard particles with different yields, such as iron sand particles or aluminum oxide particles, rigidity of the rubber mass is adjusted to be increased gradually from the lower end of the anchorage device to the upper end of the anchorage device, the device is adapted to the anchoring loading features of the CFRP ribs, and the anchoring force of the CFRP ribs is raised.

Description

technical field [0001] The invention relates to a CFRP tendon stay cable group anchor for bridges and a manufacturing process thereof. Background technique [0002] According to the analysis of the disease data of cables of many cable-stayed bridges at home and abroad, many cables in bridges have different degrees of steel wire corrosion due to the infiltration of water and air, which endangers the service life of cables and the operation safety of bridges. At present, the durability of cables and slings is generally 10-20 years, which is much lower than that of other bridge components. It is necessary to replace steel wire with CFRP (carbon fiber reinforced composite material) bars with higher strength, light weight and good durability. [0003] There are deficiencies in the existing CFRP tendon stay cable group anchorage: 1. Before the tensile strength of the CFRP tendon is reached, the CFRP tendon is sheared and broken. 2. The cable is composed of dozens of CFRP tendons...

AI Technical Summary

Problems solved by technology

[0003] There are deficiencies in the existing CFRP tendon stay cable group anchorage: 1. Before the CFRP tendon tensile strength is reached, the CFRP tendon is sheared and broken

2. The cable is composed of dozens of CFRP tendons, and it is difficult to install and position the wires

3. The epoxy resin with the same performance as the anchorage colloid cannot adapt to the anchoring characteristics of CFRP tendons, and the anchoring efficiency is low, making it difficult to give full play to the properties of CFRP materials.

The CFRP tendon in this patent is only positioned by the anchor ring, and the thickness of the anchor ring is relatively large, and the epoxy adhesive film that can be accommodated in the anchor ring is limited, that is, the strength of the CFRP tendon being fused and bonded is low, and the anchor colloid is made of the same Performance Epoxy film cannot adapt to the anchoring characteristics of CFRP tendons, and the anchoring efficiency is low, making it difficult to give full play to the properties of CFRP materials

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