A frp reinforced rectangular column with corner reinforcement and its construction method

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, in particular to an FRP reinforced rectangular column with corner reinforcement and a construction method that can be used as a structural column. Background technique [0002] Fiber-reinforced plastic (FRP) reinforced structure is a fast-developing reinforcement technology in recent years. FRP has excellent characteristics such as light weight, high strength, corrosion resistance, and easy on-site construction. Using FRP to reinforce the structural column can greatly improve the bearing capacity and ductility of the structural column without changing the appearance of the structural column and increasing the self-weight of the structure. , so it is more and more widely used in the reinforcement and transformation of existing buildings. The basic principle of FRP-strengthened structural columns is the theory of constrained concrete: the composite column is formed af...

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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 chiseling away 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. 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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