Prestressed carbon cloth reinforced tensioner

Abstract

The invention relates to a prestressed carbon cloth reinforced tensioner which is characterized by comprising two counterforce racks (1), wherein the two counterforce racks (1) are fixed to both sides of a component (13) through bolts; the counterforce racks (1) are provided with a supporting device (3); one end of carbon cloth (12) is connected with an anchorage device (5) after bypassing the supporting device (3); the anchorage device (5) is connected with one end of a universal joint (6); the other end of the universal joint (6) is connected with a pull rod (10); the pull rod (10) is provided with a lifting jack (9), and a fixing nut (7) and a tension nut (11) which are respectively positioned on both sides of the lifting jack (9); and the fixing nut (7) is positioned on the outer side of a backing board between the two counterforce racks (1). The invention has the advantages of convenient assembly and disassembly, favorable adaptability, simple operation, accurate tensioning control and little prestressing loss, is especially suitable for engineering constructions and can enhance the engineering efficiency.

Description

technical field [0001] The invention relates to a device for stretching carbon fiber cloth onto a component. Background technique [0002] Reinforcement of carbon fiber cloth to components is a very effective prestressing reinforcement technology, which has many advantages, but some key technical problems are still unresolved, and there is no complete set of tensioning equipment suitable for construction sites. [0003] At present, scholars at home and abroad mainly use the following methods to apply prestress to carbon fiber cloth: [0004] (1) Use a hydraulic jack to make the bending member produce reverse bending, and then paste the carbon fiber cloth on the reinforced member. After the structural adhesive is completely cured, remove the jack from the reinforced member, thereby indirectly applying prestress to the carbon fiber cloth. This method It can be called the pre-bending method, the schematic diagram is shown in figure 1 . [0005] In fact, the pre-bending metho...

AI Technical Summary

Problems solved by technology

Unimpregnated carbon fiber cloth is soft in texture, and it is very difficult to anchor with clip-type anchors; carbon fiber cloth has good tensile performance, but it is easy to be damaged when pressed and cut; carbon fiber cloth is woven by many extremely fine carbon fiber filaments, carbon fiber After the cloth is anchored and stretched, the tow tends to break one by one due to uneven force and even the entire cross-section breaks; after the carbon fiber cloth is stretched to a controlled stress value, it is pasted on the component with structural adhesive, and there is a period of curing time. It is also a problem to be solved to ensure that the established prestress does not decrease after the jack is removed

[0012] The above problems cannot be solved by the existing carbon fiber cloth stretching equipment

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