A trc prestress implementing device and its construction method for strengthening rc components

Abstract

The invention discloses a TRC prestress implementing device and a construction method for reinforcing RC components, including an anchoring mechanism, a tensioning mechanism, a layered positioning mechanism and a fiber net clamp; Lock box 1; tensioning mechanism includes anchor crosspiece 2, centering mechanism 2, self-locking box 2 and tensioning drive assembly; fiber mesh clamp is wedge-shaped, including clamp cover plate and clamp bottom plate that can be detachably connected; layered positioning mechanism There are a plurality of them, which are evenly arranged between the anchoring mechanism and the tensioning mechanism, and are used for forming equidistant distribution of each layer of fiber webs in the multi-layer fiber webs. The present invention can complete the application of prestress to the multi-layer fiber net at the construction site without resorting to large and complicated equipment, and realize the prestress TRC to strengthen the RC member. Good application prospect and economic value.

Description

technical field [0001] The invention relates to the technical field of structure strengthening construction, in particular to a TRC prestress implementing device and a construction method for strengthening RC components. Background technique [0002] FRP strengthening and repairing structure technology is another new type of structural strengthening technology after enlarging the concrete section and bonding steel. The reinforcement of the structure is achieved by wrapping, wrapping, and pasting FRP on the surface of the component. Compared with the traditional enlarged concrete section or steel-bonded concrete reinforcement, FRP reinforcement technology has the advantages of space saving, simple construction, no need for on-site fixed facilities, easy guarantee of construction quality, basically no increase in structural size and weight, corrosion resistance and durability Good features. Therefore, FRP reinforcement technology has attracted much favor and attention. Howe...

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Problems solved by technology

[0006] The disadvantage is that the prestressed carbon fiber cloth usually cannot stick to the surface of the component to be reinforced. Although the fiber cloth can be fixed by applying organic resin glue, the resin glue has poor adaptability to high temperature resistance, aging resistance and wet concrete surface. Poor, and the thickness and uniformity of the resin adhesive layer will lead to uneven stress distribution at the interface between the two, affecting the reinforcement effect; in addition, the prestressing device of the carbon fiber cloth must remain effective and cannot be removed after the reinforcement is completed, otherwise Due to the interface bonding problem, the fiber cloth will suffer serious prestress loss, which will affect the reinforcement effect

[0007] Patent CN105350790A discloses a method for reinforcing reinforced concrete slabs with prefabricated prestressed TRC slabs. The prefabricated prestressed TRC thin slabs are attached to the surface of reinforced concrete for the purpose of giving full play to the tensile properties of TRC materials. However, this method has the following two disadvantages: (1) The prestress is applied to the prefabricated TRC plate. Only when the component to be reinforced undergoes a large deformation, the reinforcement layer can exert its reinforcement effect, and cannot restore the deformation of the original component during service, and the reinforcement effect is not obvious; ( 2) The thickness of the prefabricated TRC board is too small to be roughened. Therefore, it is difficult to ensure the bonding quality between the reinforcement layer and the original component during the implementation process. destroy

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