Novel reinforcing method of large-section rectangular reinforced concrete column

Abstract

The invention belongs to the field of civil engineering and particularly relates to novel reinforcing method of a large-section rectangular reinforced concrete column. Namely, a first fiber reinforced plastic (FRP) corner band is stuck at the four rotary corners of the rectangular reinforced concrete column section in the horizontal direction correspondingly firstly, interspaces between the adjacent first FRP corner bands in the horizontal direction are filled and leveled up with epoxy resin, and then an FRP side face band is stuck on the outer side of each first FRP corner band; the two adjacent first FRP corner bands on the same side face are covered with the corresponding FRP side face band, and interspaces between the FRP side face bands are filled and leveled up with epoxy resin in the horizontal direction; and finally, a second FRP corner band is stuck at the four rotary corners of the rectangular reinforced concrete column section in the horizontal direction correspondingly, and fibers in the first FRP corner bands and the second FRP corner bands are in the horizontal direction. According to the novel reinforcing method of the large-section rectangular reinforced concrete column, stress concentration of the ends of the rectangular pillar can be reduced, end FRP cloth is prevented from being damaged untimely, and the bearing capacity and deforming capacity of the rectangular pillar are greatly improved.

Description

technical field [0001] The invention belongs to the field of civil engineering, in particular to a method for reinforcing a novel large-section rectangular reinforced concrete column. Background technique [0002] Fiber Reinforced Plastics (FRP) is a new type of material formed by mixing fiber materials and matrix materials (resin) in a certain proportion. It has many excellent properties such as light weight, high strength, corrosion resistance, and fatigue resistance. It is widely used in civil engineering, not only for the reinforcement of existing structures, but also for new structures. The basic principle of FRP reinforcement technology is: when the reinforced concrete rectangular column is subjected to axial load, it will expand laterally, and the FRP fabric will generate tensile stress, which provides lateral constraints on the core concrete, making the concrete in a stress state of three-dimensional compression, thereby increasing the core strength. The compressive...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a reinforcement method for a rectangular reinforced concrete column with a large cross-section, which is suitable for a rectangular column with a section length of more than 600mm, so as to solve the difficulty of chamfering the rectangular column of steel bars and the stress concentration caused by the chamfering. The problem that the FRP cloth is broken prematurely

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