Prestressed tension device and method for fiber sheet

Abstract

The invention relates to a prestressed tension device for a fiber sheet. The prestressed tension device comprises an adjustable support, a digital display torque wrench, a sleeve and a clamping plate. The adjustable support is formed by connecting a first support body and a second support body through screws and nuts, the fiber sheet is clamped and fixed to the support body on one side of the adjustable support through the clamping plate, the torque wrench is matched with the sleeve to adjust the nuts, the distance between the support bodies is changed accordingly, and the fiber sheet is tensioned. According to the prestressed tension method based on the prestressed tension device for the fiber sheet, prestressed tension of the fiber sheet is achieved by adjusting the screws and the nuts, and fastening tension is controlled through the digital display torque wrench. Compared with the prior art, the prestressed tension device and method have the advantages that the device is simple in structure, flexible in mounting and disassembling, low in manufacturing cost and capable of being repeatedly used; the construction method is simple and practicable, operation can be carried out by one worker, tensioning force is accurately controlled, and construction efficiency is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of structure reinforcement construction, in particular to a prestressed stretching device and a prestressed stretching method for fiber sheets. Background technique [0002] In recent years, fiber sheets have been more and more widely used in the field of structural repair and reinforcement due to their 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 sheets is widely promoted, researchers also found that there are obvious technical defects in the commonly used reinforcement methods of high-strength fiber sheets: since the elastic modulus of high-strength fiber sheets is only equivalent to that of steel, the When the steel bar yields, its strength is less than 20%. Only when the component cracks seriously and the deformation inc...

AI Technical Summary

Problems solved by technology

However, while the reinforcement method of high-strength fiber sheets is widely promoted, researchers also found that there are obvious technical defects in the commonly used reinforcement methods of high-strength fiber sheets: since the elastic modulus of high-strength fiber sheets is only equivalent to that of steel, the When the steel bar yields, its strength is less than 20%. Only when the component cracks seriously and the deformation increases significantly, can it develop more strength value, but at this time, the component often cannot meet the normal use requirements.

2) Install permanent anchors on the reinforcement components, and stretch the fiber sheets with the reinforcement components themselves as the reaction frame. It is difficult, and the anchors cannot be reused, which increases the one-time investment cost

This method is simple and easy to implement, and the input cost is low, but there is no prestressed tensioning device that is easy to construct on the market, and the applied tension cannot be controlled

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