Fibre reinforced plastic (FRP) reinforcing rectangular column with corner reinforcement and construction method thereof

Abstract

The invention discloses a fibre reinforced plastic (FRP) reinforcing rectangular column with corner reinforcement and a construction method of the FRP reinforcing rectangular column. The FRP reinforcing rectangular column is characterized in that an FRP reinforcing layer (2) of a rectangular column (1) is provided with a prefabricated chamfer (3) and corner reinforcement (4). The FRP reinforcing rectangular column has the advantages of small amount of FRP, high reinforcing efficiency, low reinforcing cost, high bearing capacity and ductility of the reinforcing column, high accuracy of FRP reinforcing construction, convenience in construction, etc.

Description

Technical field [0001] The invention mainly relates to the field of building structures in civil engineering, and particularly refers to a FRP reinforced rectangular column with corner reinforcement that can be used as a structural column and a construction method. Background technique [0002] Fiber reinforced plastic (FRP) reinforcement structure is the rapid development of reinforcement technology in recent years. FRP has excellent characteristics such as light weight, high strength, corrosion resistance, and easy on-site construction. FRP is used to reinforce the structural column. Under the premise of basically not changing the appearance of the structural column and increasing the structural weight, the bearing capacity and ductility of the structural column are greatly improved. Therefore, it is more and more widely used in the reinforcement and transformation of existing buildings. The basic principle of FRP-reinforced structural columns is the theory of constrained conc...

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Problems solved by technology

[0004] At present, the main problem of using FRP to strengthen rectangular columns is that in the reinforcement design stage, in order to overcome the problem of reducing the reinforcement effect caused by the stress concentration of the FRP reinforcement layer at the chamfer of the reinforcement column, the method of increasing the number of FRP reinforcement layers is often used Solution, although the bearing capacity and ductility of the reinforced column can be improved, but the stress concentration phenomenon at the chamfered part is not actually improved, and the utilization efficiency of FRP is reduced instead, which leads to a reduction in the ratio of reinforcement efficiency / cost; in the field construction stage , after removing the concrete at the corner of the rectangular column (take the concrete column as an example), the corner must be partially repaired, and the chamfer must be formed according to the design radius of curvature, and this work is currently done manually, and the formed chamfer The radius of curvature often cannot guarantee that the design requirements are met along the entire height of the column, and the actual reinforcement effect of FRP is difficult to control, which affects the safety of the structure

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