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Method for improving FRP tendon concrete structure ductility

A kind of concrete structure and concrete technology, which is applied in the direction of building components, building structure, earthquake resistance, etc., can solve the problems of no plastic rotation ability and small deformation ability, and achieve the effect of overcoming the defects of brittle failure, increasing curvature ductility, and convenient construction

Inactive Publication Date: 2011-08-31
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because FRP bars are brittle materials, their deformation capacity is significantly smaller than that of ordinary steel bars. With their high tensile strength and linear stress-strain relationship, FRP bar concrete structures may not have the corresponding plastic rotation capacity, resulting in obvious brittle structural members.

Method used

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  • Method for improving FRP tendon concrete structure ductility
  • Method for improving FRP tendon concrete structure ductility
  • Method for improving FRP tendon concrete structure ductility

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: see figure 1 , figure 2 , the method for improving the ductility of the FRP reinforced concrete structure is as follows: according to the cross-sectional size of the FRP reinforced concrete structure 1 and the number and diameter of the FRP reinforcement 2, make the required element 3 in this embodiment, and drill in the element 3. The corresponding holes, when the FRP bars 2 in the FRP reinforced concrete structure are installed, are figure 1 Install the fixed element 3 at the required element 3 position marked in , and then pour concrete to complete the construction of the FRP reinforced concrete structure. The specific operation steps are as follows:

[0022] (1) According to the cross-sectional size of the FRP reinforced concrete member 1 and the number and diameter of the FRP reinforced concrete member 2, make the component member 3 (integral type);

[0023] (2) Drill holes perpendicular to the surface in the element 3;

[0024] (3) When the FRP bar...

Embodiment 2

[0026] Example 2: see figure 2 , this embodiment is basically the same as the above-mentioned embodiment, the difference is that the element 3 is a separate type, that is, the element 3 can be installed on each or every few FRP bars, and the element 3 can be installed in combination After completion, the entire cross-sectional shape of the FRP reinforced concrete member 1 can still be assembled.

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Abstract

The invention relates to a method for improving FRP tendon concrete structure ductility, comprising the step of building an FRP tendon concrete structure. When the FRP tendon concrete structure is built, a component with effective compressive strength and formability is installed in a zone which has larger bending moment of the FRP tendon concrete structure so as to improve the ductility capability of the structure. Under the condition of constant FRP tendon formability, the invention effectively increases the deformation of the concrete compressive zone and the curvature ductility of a crosssection, overcomes the defect of the brittle failure of the FRP tendon concrete construction member to ensure that the FRP tendon can be widely applied. The invention does not change concrete appearance size, has convenient construction, is economically feasible and is a method for effectively improving the FRP tendon concrete structure ductility.

Description

technical field [0001] The invention relates to a method for improving the ductility of an FRP reinforced concrete structure. Background technique [0002] Corrosion of steel bars has a very serious impact on the durability of reinforced concrete structures, which will reduce the normal service life of the structure and increase the maintenance cost of the structure. Fiber-Reinforced Plastics (FRP) bars are a high-performance composite material. , has the advantages of light weight, high strength, high chemical stability (acid, alkali, salt and oxide, etc.), electromagnetic neutrality, etc., the long-term comprehensive benefit of being used in concrete structures is better than that of steel bars, and it has good application prospects. However, because FRP reinforcement is a brittle material, its deformation capacity is significantly smaller than that of ordinary reinforcement. Its high tensile strength and linear stress-strain relationship make the FRP reinforcement concret...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B1/16E04B1/98
Inventor 刘涛张智梅王英锐张晏戌公孙铭褚卫丰许文前
Owner SHANGHAI UNIV
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