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Novel reinforcing method of small-section rectangular reinforced concrete column

A technology of reinforced concrete columns and small sections, applied in the directions of columns, piers, pillars, etc., can solve the problems of shear failure of FRP cloth, difficulty in grinding and chamfering of reinforced rectangular columns, and breaking, and improve the bearing capacity and deformation capacity. , The effect of eliminating stress concentration and avoiding corner damage

Inactive Publication Date: 2017-06-13
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Abstract
  • Description
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a new type of reinforcement method for small-section rectangular reinforced concrete columns, which is suitable for rectangular columns with a section length of less than 600mm, to solve the difficulty of chamfering the rectangular columns of steel bars, and due to the stress concentration at the ends, FRP cloth is broken due to premature shear failure

Method used

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  • Novel reinforcing method of small-section rectangular reinforced concrete column
  • Novel reinforcing method of small-section rectangular reinforced concrete column

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Embodiment Construction

[0022] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0023] In the description of the present invention, unless otherwise stated, the meaning of "multilayer" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention.

[0024] Such as figure 1 , 2 As shown, this embodiment provi...

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Abstract

The invention belongs to the field of civil engineering, and in particular relates to a new type of reinforcement method for a rectangular reinforced concrete column with a small cross-section, namely: firstly paste a FRP corner strip on each of the four corners of the rectangular reinforced concrete column section along the horizontal direction, The fibers in the FRP corner strips are in the horizontal direction, and the gaps between the adjacent FRP corner strips in the horizontal direction are filled with epoxy resin, and then the FRP wrapping strips are pasted around the same cross section on the outside of all FRP corner strips. The method of the present invention solves the problem of difficult chamfering of the rectangular column, reduces the stress concentration at the end of the rectangular column, prevents the FRP cloth at the end from being sheared and broken prematurely, and greatly improves the material performance of the FRP cloth. The utilization rate increases the strength and ductility of the reinforced concrete column, and improves its bearing capacity and deformation capacity.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a reinforcement method for a novel small-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. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C3/34E04G23/02
CPCE04C3/34E04G23/02
Inventor 王作虎杨文雄崔宇强刘杜
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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