Method for improving FRP tendon concrete structure ductility

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

Inactive Publication Date: 2010-03-17
SHANGHAI UNIV
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  • 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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment one: see figure 1 , figure 2 , the method for improving the ductility of FRP-reinforced concrete structures is as follows: according to the cross-sectional size of FRP-reinforced concrete structure 1 and the quantity and diameter of FRP tendons 2, make the required element member 3 in this embodiment, and drill in element element 3 Corresponding hole, when installing FRP bar 2 in the FRP bar concrete structure, in figure 1 Install the fixed element 3 at the position of the required element 3 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 quantity and diameter of the FRP reinforced concrete member 2, the element member 3 (integral type) is made;

[0023] (2) drilling a hole perpendicular to the surface in the element member 3;

[0024] (3) When installing ...

Embodiment 2

[0026] Embodiment two: see figure 2 , this embodiment is basically the same as the above-mentioned embodiment, the difference is that the element component 3 is a separate type, that is, the element component 3 can be installed on each or every few FRP tendons, and the element component 3 can be installed in combination After finishing, 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, which is used in the construction of the FRP-reinforced concrete structure to improve the ductility of the FRP-reinforced concrete structure. Background technique [0002] Steel bar corrosion 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 resistance, etc.), electromagnetic neutrality, etc. The long-term comprehensive benefits of applying to concrete structures are better than steel bars, and have good application prospects. However, because FRP bars are brittle materials, their deformation capacity is significantly smaller than ...

Claims

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Application Information

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IPC IPC(8): E04B1/98E04B1/16
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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