Prestress tensioning device and use method of fiber cloth

Abstract

The invention relates to a prestress tensioning device and use method of fiber cloth. Two ends of a supporting rod are fixedly connected with steel members through base plates, a hydraulic jack is fixed between one end of the supporting rod and one base plate, and two mutually-parallel rolling shafts are arranged on each steel member. According to the use method, the fiber cloth is wound around the rolling shafts by one circle, a lap joint length is reserved, clamping pieces are used for conducting firm clamping on the lap joint area of the fiber cloth, pressurization is carried out on the hydraulic jack, the prestress tensioning device and the fiber cloth are jointly lifted to the portion which needs reinforcing, and the construction operation of pasting the high-strength fiber cloth can be carried out. The prestress tensioning device and use method of the fiber cloth has the advantages of being simple and skillful in structure, being not limited by the field, easy to construct and capable of fully developing a strength value of the high-strength fiber cloth, adopting the mode that the jack is internally arranged to exert expansive force, and achieving the aim of exerting prestress due to the fact that the high-strength fiber cloth wound on the rolling shaft is lengthened through the rolling shafts arranged on the end portions.

Description

technical field [0001] The invention belongs to the technical field of structure reinforcement construction, and in particular relates to a prestressed tensioning device and a use method of fiber cloth. Background technique [0002] In recent years, fiber cloth has been more and more widely used in the field of structural repair and reinforcement due to its unique advantages such as light weight, high strength (the strength of carbon fiber is about 10 times that of steel), corrosion resistance, and convenient construction. However, while the reinforcement method of high-strength fiber cloth is widely promoted, researchers also found that there are obvious technical defects in the common reinforcement method of high-strength fiber cloth: since the elastic modulus of high-strength fiber cloth is not higher than that of steel, when the tensile steel bar yields, Its strength is only less than 20%, and only when the component is severely cracked and the deformation is significant...

AI Technical Summary

Problems solved by technology

However, while the reinforcement method of high-strength fiber cloth has been widely promoted, researchers have also found that there are obvious technical defects in the common reinforcement method of high-strength fiber cloth: since the elastic modulus of high-strength fiber cloth is not higher than that of steel, when the tensile steel bar yields, Its strength is only less than 20%. Only when the component is severely cracked and the deformation is significantly increased, it is possible to exert more strength value, but at this time the component can no longer meet the normal use requirements.

[0004] Since there is no high-strength fiber cloth prestressed tensioning equipment that is easy to construct in the market, the development of high-strength fiber cloth prestressed construction equipment has become the key to the popularization and use of this technology.

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