A decomposed prestressed carbon fiber tensioning device and its construction method

Abstract

The invention discloses a decomposition-type prestressed carbon fiber tensioning device which comprises a pair of prestressed tensioning components symmetrically fixed on a to-be-reinforced component, at least one carbon fiber board arranged between the prestressed tensioning component, a tensioning anchor connecting the end of each carbon fiber board onto the adjacent prestressed tensioning component, and at least two anchoring boards compressing the carbon fiber boards on the surface of a to-be-reinforced structure. The invention further discloses a construction method applied on the prestressed carbon fiber tensioning device. The decomposition-type prestressed carbon fiber tensioning device is simple in structural design, a prestressed carbon fiber anchor is decomposed into the reusable tensioning anchor and a flat plate anchor which is permanently fixed by means of bonding through epoxy structure glue and compressing through bolts, and the decomposition-type prestressed carbon fiber tensioning device is simple in structure and low in cost.

Description

technical field [0001] The invention relates to the technical field of civil structure engineering, in particular to a decomposed prestressed carbon fiber tensioning device and a construction method. Background technique [0002] The technology of prestressed carbon fiber reinforced concrete structure bending member is to use carbon fiber as prestressed tendon, apply prestress to carbon fiber and anchor it on the concrete bending member through special tension anchoring device, and the bending member through epoxy Structural glue is bonded to bear the tensile stress. This reinforcement technology combines the active reinforcement technology of external prestressing with the high-strength performance of carbon fiber materials, which greatly improves the utilization rate of carbon fiber materials and can effectively heal the existing concrete structures. The crack disease of the component can greatly improve the ultimate bearing capacity of the reinforced component. [0003] ...

AI Technical Summary

Problems solved by technology

The tensile stress value of carbon fiber is ≥100KN. Generally, 4 bolts at each end are used to transfer new prestress to the original structure. The stress is concentrated and part of the tension anchoring device needs to excavate the structural surface concrete when installing it. For the structure of civil buildings or industrial plants The stiffness or the thickness of the concrete beam slab or the height of the beam is relatively smaller than that of the bridge structure. Obviously, the existing prestressed carbon fiber reinforcement technology cannot be popularized and applied in the structural reinforcement of civil buildings and industrial plants

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