Pre-stressing carbon fiber cloth reinforcement reinforced concrete column construction method

Abstract

The invention discloses a pre-stressing carbon fiber cloth reinforcement reinforced concrete column construction method. The method comprises the steps: performing chamfering, surface polishing and hole filling treatments on a to-be-reinforced concrete column, and coating the surface of a pre-designed to-be-reinforced part with epoxy, thereby achieving a function of reducing surface friction force between carbon fiber cloth and concrete after the epoxy is solidified, and effectively transferring a pre-stressing force; meanwhile, in order to prevent the edge of the carbon fiber cloth from running before covering, adhering a transparent adhesive tape on the surface of the carbon fiber cloth; clamping the carbon fiber cloth by utilizing self-locking type anchorage clamping pieces, winding the carbon fiber cloth around the covered concrete column, and screwing a screw rod by utilizing a spanner to apply a pre-stressing force; after the pre-stressing force is up to a preset size, and re-coating the surface of the carbon fiber cloth with a layer of epoxy, thereby preventing individual fibers of the carbon fiber cloth from generating breaking and running situations, and ensuring the integral stress. The pre-stressing carbon fiber cloth reinforcement reinforced concrete column construction method has the advantages that the concept is novel, construction steps are clear, simple and practical, and a high-strength function of the carbon fiber cloth is fully exerted, so that the reinforcement effect is integrally improved, and the method is convenient to popularize and apply.

Description

technical field [0001] The invention belongs to the field of structure reinforcement, in particular to a construction method for reinforcing reinforced concrete columns with prestressed carbon fiber cloth. This method is suitable for general housing construction, especially for the reinforcement and reconstruction of reinforced concrete columns of large public buildings (such as schools and shopping malls) that are mainly subjected to axial pressure. Background technique [0002] In recent years, more and more buildings need to be reinforced. For reinforced concrete columns, the traditional reinforcement methods include enlarging the section method, bonding steel reinforcement method and bonding carbon fiber cloth reinforcement method, among which the carbon fiber cloth reinforcement method is based on its construction The advantages of convenience and no increase in building weight have been widely used in recent years, but problems follow after use. First of all, a large ...

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Problems solved by technology

However, this reinforcement method will also encounter some problems in the implementation process. First, the concrete surface is not very smooth after grinding, and the friction resistance between it and carbon fiber cloth will affect the transmission of prestress, thereby affecting its reinforcement effect; secondly, carbon fiber cloth is a single When the prestress is applied to the filamentary braid through the self-locking anchor, due to the uneven force, the individual tows on the surface of the carbon fiber cloth are broken, and the surface "fluffing" occurs, thereby reducing the overall mechanical performance of the carbon fiber cloth. , affecting the improvement of the bearing capacity of the reinforced member

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