Composite CFRP (Carbon Fibre Reinforced Polymer) tendon anchoring system

Abstract

The invention discloses a composite CFRP (Carbon Fibre Reinforced Polymer) tendon anchoring system which comprises an anchor ring, a two-piece wedge-shaped clip, a soft metal sheath and an epoxy adhesive film, wherein the soft metal sheath is fixed at the anchoring end of a CFRP tendon by the epoxy adhesive film so as to form an integral apparatus; and the integral apparatus is inserted in the two-piece wedge-shaped clip, and the two-piece wedge-shaped clip extends in the anchor ring and then is fixed. The composite anchorage device has the characteristics of small size, large anchoring force, and easiness for installation and use, and is applicable to the on-site construction of prestressed structures. Under the condition of not increasing the size of the anchor ring, the anchoring force can be increased in a mode of increasing the bonding length of the soft metal sheath, and the transverse force of the CFRP tendon is protected. The composite CFRP tendon anchoring system can anchor a single tendon, and also can anchor multiple tendons, thus being extremely applicable to prestressed structures.

Description

technical field [0001] The invention relates to the field of prestressed structures in civil engineering, in particular to a composite CFRP tendon anchorage system. Background technique [0002] Carbon Fiber Reinforced Polymer (CFRP) has the advantages of light weight, high strength, good corrosion resistance, good fatigue resistance and small prestress loss. At present, CFRP bars have been applied to prestressed structures instead of steel bars as cable members in the structure, and good results have been achieved. [0003] CFRP tendons require a special anchorage method due to their weak transverse mechanical properties. The existing CFRP tendon anchoring methods are mainly bonded and clamped anchors. These two different types of anchors have their own advantages and disadvantages: [0004] 1. The bonded anchor has a large anchoring force and can anchor multiple tendons, but the anchor is large in size, high in cost and inconvenient to use; [0005] 2. The clamping anch...

AI Technical Summary

Problems solved by technology

[0004] 1. The bonded anchor has a large anchoring force and can anchor multiple tendons, but the anchor is large in size, high in cost and inconvenient to use;

[0005] 2. The clamping anchor body is small in size and easy to use, but the anchoring force is limited, usually only a single bar can be anchored, the processing accuracy is high and the versatility is poor

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