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Composite stirrup

A technology of composite materials and stirrups, which is applied in the field of composite material stirrups, can solve the problems of non-standard use of sea sand mixing concrete, failure of components, hidden safety hazards, etc., to achieve increased rigidity, rapid forming, and improved overall mechanical performance Effect

Inactive Publication Date: 2013-08-14
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to various reasons in the project, there is a phenomenon of non-standard use of sea sand to mix concrete, resulting in rapid corrosion of steel bars and failure of components
All of the above situations will cause major safety hazards and economic losses.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as Figure 6 As shown, a composite material stirrup is an ordinary rectangular stirrup 1, which is used in a precast concrete beam, and the longitudinal reinforcement at the bottom of the beam and the vertical reinforcement at the top of the beam are both composite material reinforcement. When in use, the composite material bars are inserted into the rectangular stirrups 1 and bound with thin iron wires to form a reinforcement cage. The ordinary rectangular stirrup 1 is prefabricated in a factory and manufactured by manual winding, that is, the resin-impregnated composite fiber bundle is wound on a pre-made mold, and the mold can be released after the resin is cured.

Embodiment 2

[0028] Such as Figure 7 As shown, a composite material stirrup is a rectangular stirrup 1 with a composite material bracket 5, which is used in a concrete beam. The longitudinal reinforcement at the bottom of the beam and the vertical reinforcement at the top are both composite material reinforcement, and the concrete is made of sea sand Mixed concrete. When in use, pass the composite material longitudinal reinforcement and vertical reinforcement through the rectangular stirrup 1, and press them into the clamping groove to be fixed. The rectangular stirrup 1 with the composite material bracket 5 is prefabricated in the factory. Firstly, a composite material cavity profile with the same cross-sectional shape as the rectangular stirrup 1 is produced by pultrusion process, and then the corresponding width is cut according to the designed size to form the rectangular stirrup. Rectangular stirrup 1 with bracket 5 of composite material.

Embodiment 3

[0030] Such as Figure 8 As shown, a composite material stirrup is a rectangular composite stirrup 2, which is used in a concrete column. 2. Fix it with the longitudinal reinforcement to form a reinforcement cage (the thin iron wire at the binding place is omitted in the figure). The rectangular composite stirrup 2 is prefabricated in a factory. Firstly, a multi-cavity hollow tube of composite material with the same cross-sectional shape as the stirrup is produced by pultrusion process, and then the corresponding width is cut according to the designed size to form the rectangular composite stirrup 2 .

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Abstract

The invention discloses a composite stirrup. A single limb of the composite stirrup is a composite flat bar, a composite is a continuous fiber reinforced resin based composite, and the composite stirrup is divided into rectangular stirrups, circular stirrups, compound stirrups or spiral stirrups according to the form. The composite stirrup disclosed by the invention has the characteristics of convenience for production and molding and accurate size; when the composite stirrup is matched with composite ribs, the durableness of a reinforced concrete structure can be effectively improved; meanwhile, the composite stirrup also can be applied to sea water or sea sand mixed concrete; and the composite stirrup can be made of local materials, and thus the material and construction costs are lowered. Therefore, the composite stirrup has broad application prospect in coastal regions and northern areas in which a large number of snow melting salts are used.

Description

technical field [0001] The invention relates to a composite material stirrup, in particular to a stirrup which can be used for various concrete components. Background technique [0002] As a modern engineering structural material, reinforced concrete has been widely used in various fields of civil engineering. However, due to the presence of a large number of microcracks in reinforced concrete members during normal use, moist air and other media will invade the interior of the concrete and contact with the steel bars, causing corrosion and rust of the steel bars, greatly reducing the durability of reinforced concrete members. The maintenance and repair of reinforced concrete structures has become a burden for governments of all countries. Especially in areas where deicing salt is used in large quantities in the north, structures such as bridges exposed to the natural environment will have serious corrosion of internal steel bars due to erosion by deicing salt. In addition,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/20
Inventor 齐玉军刘伟庆黄杨方海
Owner NANJING UNIV OF TECH
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